Re: Opportunity missed by Python ?
On Thu, Oct 13, 2011 at 11:07 AM, Chris Angelico wrote: > On Thu, Oct 13, 2011 at 8:45 PM, candide wrote: > > Dart is the very new language created by Google to replace Javascript. > > So Python was not able to do the job? Or may be they don't know about > Python > > at Google ;) ? > > > > Also, Dart is looking to support (optional) strict typing, which > Python doesn't do. That's a fairly major performance enhancement. > > Traits from Enthought has defined types. I'm no expert mind so might not be suitable. Cheers, Jack -- The earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that in glory and in triumph they could become the momentary masters of a fraction of a dot. - Carl Sagan [Pale Blue Dot] -- http://mail.python.org/mailman/listinfo/python-list
Execute a command on remote machine in python
Hi, I am first time trying my hands on python scripting and would need some guidance from the experts on my problem. I want to execute a windows command within python script from a client machine on a remote target server, and would want the output of the command written in a file on client machine. What is the way it could be achieved. Thanks in advance, Roark. -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
On 11/15/11 12:04, Roark wrote: Hi, I am first time trying my hands on python scripting and would need some guidance from the experts on my problem. I want to execute a windows command within python script from a client machine on a remote target server, and would want the output of the command written in a file on client machine. What is the way it could be achieved. If your doing windows to windows then you could wrap PsExec (sysinternals) or the open source but more or less abandoned RemCom (http://sourceforge.net/projects/rce). Disadvantage is that both of them are a royal PITA to wrap nicely. There are multiple problems with re-redirected STDOUT/STDERR Advantage is that you don't need to configure anything on the target machine. hth -- mph -- http://mail.python.org/mailman/listinfo/python-list
PREFIX directory for pip command
Is it possible to specify PREFIX directory for pip command by environment variable? I found that 'pip install --install-option=--prefix=PREFIX' works well, but I don't want to specify '--install-option=--prefix=PREFIX' every time. I prefer to specify it by environment variable such as:: export PIP_INSTALL_DIR=$PWD/local Is it possible? Or any idea? -- regards, makoto -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
Martin P. Hellwig wrote: On 11/15/11 12:04, Roark wrote: Hi, I am first time trying my hands on python scripting and would need some guidance from the experts on my problem. I want to execute a windows command within python script from a client machine on a remote target server, and would want the output of the command written in a file on client machine. What is the way it could be achieved. If your doing windows to windows then you could wrap PsExec (sysinternals) or the open source but more or less abandoned RemCom (http://sourceforge.net/projects/rce). Disadvantage is that both of them are a royal PITA to wrap nicely. There are multiple problems with re-redirected STDOUT/STDERR Advantage is that you don't need to configure anything on the target machine. hth have a look at execnet http://codespeak.net/execnet/ It allows you to execute python code on a remote machine, assuming the distant machine has python installed. Work fine with either nix or windows systems. Regarding the file transfert, it sounds like pywin32 provides the netcopy service, but I'm not sure, I'm not working with windows. JM -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
On Tue, Nov 15, 2011 at 11:04 PM, Roark wrote: > Hi, > > I want to execute a windows command within python script from a client > machine on a remote target server, and would want the output of the > command written in a file on client machine. What is the way it could > be achieved. This looks like a job for SSH. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
It sounds like Fabric is what you're after. We use it at work and it's the best thing since ssh. ;] http://docs.fabfile.org/en/1.3.2/index.html (Actually, it uses ssh internally and allows you to do remote shell-like programming in a pythonic fashion.) Cheers, Xav On 15 November 2011 22:04, Roark wrote: > Hi, > > I am first time trying my hands on python scripting and would need > some guidance from the experts on my problem. > > I want to execute a windows command within python script from a client > machine on a remote target server, and would want the output of the > command written in a file on client machine. What is the way it could > be achieved. > > > Thanks in advance, > Roark. > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
In article , Chris Angelico wrote: > On Tue, Nov 15, 2011 at 11:04 PM, Roark wrote: > > Hi, > > > > I want to execute a windows command within python script from a client > > machine on a remote target server, and would want the output of the > > command written in a file on client machine. What is the way it could > > be achieved. > > This looks like a job for SSH. You might also want to look at fabric (http://fabfile.org). It's a nice python library for remote command execution built on top of SSH. A more general answer is that, yes, SSH is the right thing to be looking at for your basic connectivity, data transport and remote command execution. But trying to deal with raw SSH will drive you batty. Something like fabric, layered on top of SSH, will make things a lot easier. -- http://mail.python.org/mailman/listinfo/python-list
Re: else in try/except
On 2011-11-15, Barry W Brown wrote: > I thought that the point of the else clause is that it is reached > only if there is no exception in the try clause. Not really. If that's all you wanted, then you just put the code at the end of the try block. -- Grant Edwards grant.b.edwardsYow! ... I see TOILET at SEATS ... gmail.com -- http://mail.python.org/mailman/listinfo/python-list
Re: PREFIX directory for pip command
Makoto Kuwata wrote: > Is it possible to specify PREFIX directory for pip command by > environment variable? > > I found that 'pip install --install-option=--prefix=PREFIX' works well, > but I don't want to specify '--install-option=--prefix=PREFIX' every time. > I prefer to specify it by environment variable such as:: > >export PIP_INSTALL_DIR=$PWD/local > > Is it possible? Or any idea? I'd try export PIP_INSTALL_OPTION=--prefix=$PWD/local using a config file is also possible. See http://www.pip-installer.org/en/latest/configuration.html Ciao Marc -- http://mail.python.org/mailman/listinfo/python-list
Re: else in try/except
On 11/15/11 2:31 PM, Grant Edwards wrote: On 2011-11-15, Barry W Brown wrote: I thought that the point of the else clause is that it is reached only if there is no exception in the try clause. Not really. If that's all you wanted, then you just put the code at the end of the try block. No, he's right. You should only put code in the try: block where you want exceptions to be caught. Everything else should be outside of the block. You really do want to minimize the amount of code inside the try: block. try: # minimal code that might raise exceptions that you want to catch except ThisError: # handle ThisError exceptions, and probably continue execution except ThatError: # handle ThatError exceptions, and probably continue execution else: # Code that only runs if ThisError or ThatError were not # raised in the try: block. This code may raise ThisError or ThatError # exceptions that should not be caught by the above except: blocks. # Other code that runs regardless if a caught-and-continued exception # was raised or not -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
On Nov 15, 1:04 pm, Roark wrote: > Hi, > > I am first time trying my hands on python scripting and would need > some guidance from the experts on my problem. > > I want to execute a windows command within python script from a client > machine on a remote target server, and would want the output of the > command written in a file on client machine. What is the way it could > be achieved. > > Thanks in advance, > Roark. Hello Roark, If the command does not change over time, an option could be to encapsulate the command and the output behind an XML-RPC interface. I used it several times now and for me this works perfectly. XML-RPC is part of the Python standard library, so it should work out of the box on windows and linux. It also supports mixed programming languages (maybe C# on windows to get the info you want and python on linux on the client). Kind regards, Marco -- http://mail.python.org/mailman/listinfo/python-list
Re: PREFIX directory for pip command
On Tue, Nov 15, 2011 at 11:33 PM, Marc Christiansen wrote: > > I'd try > export PIP_INSTALL_OPTION=--prefix=$PWD/local It works very well. Thank you. -- regards, makoto > > using a config file is also possible. See > http://www.pip-installer.org/en/latest/configuration.html > > Ciao > Marc > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute a command on remote machine in python
You could easily script this with popen calling secure shell to execute a command and capture the output. Sent from my iPhone On Nov 15, 2011, at 7:04 AM, Roark wrote: > Hi, > > I am first time trying my hands on python scripting and would need > some guidance from the experts on my problem. > > I want to execute a windows command within python script from a client > machine on a remote target server, and would want the output of the > command written in a file on client machine. What is the way it could > be achieved. > > > Thanks in advance, > Roark. > -- > http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: all() is slow?
On Nov 7, 1:00 pm, "OKB (not okblacke)"
wrote:
> I noticed this (Python 2.6.5 on Windows XP):
> http://book-az.com
> >>> import random, timeit
> >>> def myAll(x):
>
> ... for a in x:
> ... if a not in (True, False):
> ... return False
> ... return True>>> x = [random.choice([True, False]) for a in xrange(0,
> 500)]
> >>> timeit.timeit('myAll(x)', 'from __main__ import myAll, x',
>
> number=10)
> 0: 9.7685158309226452>>> timeit.timeit('all(a in (True, False) for a in x)',
> 'from __main__
>
> import x', number=10)
> 1: 12.348196768024984>>> x = [random.randint(0,100) for a in xrange(0,
> 500)]
> >>> def myAll(x):
>
> ... for a in x:
> ... if not a <= 100:
> ... return False
> ... return True>>> timeit.timeit('myAll(x)', 'from __main__ import myAll,
> x',
>
> number=10)
> 4: 2.8248207523582209>>> timeit.timeit('all(a <= 100 for a in x)',
> 'gc.enable(); from
>
> __main__ import x', number=10)
> 5: 4.6433557896324942
>
> What is the point of the all() function being a builtin if it's
> slower than writing a function to do the check myself?
>
> --
> --OKB (not okblacke)
> Brendan Barnwell
> "Do not follow where the path may lead. Go, instead, where there is
> no path, and leave a trail."
> --author unknown
--
http://mail.python.org/mailman/listinfo/python-list
RE: Extracting elements over multiple lists?
>>for x in a, b, c: >>del x[0] >for arr in [a,b,c]: > arr.pop(0) >(Peter's "del" solution is quite close, but I find the 'del' statement >tricky in python and will mislead many python newcomers) Can you expand on why 'del' is "tricky"/misleading? Ramit Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 -- This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. -- http://mail.python.org/mailman/listinfo/python-list
suppressing import errors
Hi, Is there a way to suppress all the errors when importing a module in python? By that I mean.. If I have other imports in the module I'm trying to import that fail, I still want my module to be imported that way.. Many thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
As with any Python code, you can wrap the import into a try: except block. try: import badModule except: pass # Or otherwise handle the exception - possibly importing an alternative module. As with any except statement, specific exceptions may be caught (rather than the blank, catch everything). Chris On Tue, Nov 15, 2011 at 9:11 AM, Andreea Babiuc wrote: > Hi, > > Is there a way to suppress all the errors when importing a module in python? > > By that I mean.. If I have other imports in the module I'm trying to import > that fail, I still want my module to be imported that way.. > > Many thanks. > > -- > http://mail.python.org/mailman/listinfo/python-list > > -- http://mail.python.org/mailman/listinfo/python-list
RE: overview on dao
>> Perhaps you should call it "LaoZiDao". >I just prefer shorter name. DAO as Data Access Objects is a common acronym in several languages (i.e. Java), so you will continually have this naming conflict. Just be aware that this conflict will happen frequently in the minds of many programmers. Ramit P.S. I vote for PyLaoziDao :P Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 -- This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On 15 November 2011 17:24, Chris Kaynor wrote: > As with any Python code, you can wrap the import into a try: except block. > > try: > import badModule > except: > > pass # Or otherwise handle the exception - possibly importing an > alternative module. > > Hmm, I know this might sound silly, but if it fails I still want to import the module and disable those lines of code that are related to the reason while the module failed to be imported in the first place. Even if that makes the code not 100% correct. Does that make sense ? > As with any except statement, specific exceptions may be caught > (rather than the blank, catch everything). > > Chris > > On Tue, Nov 15, 2011 at 9:11 AM, Andreea Babiuc > wrote: > > Hi, > > > > Is there a way to suppress all the errors when importing a module in > python? > > > > By that I mean.. If I have other imports in the module I'm trying to > import > > that fail, I still want my module to be imported that way.. > > > > Many thanks. > > > > -- > > http://mail.python.org/mailman/listinfo/python-list > > > > > -- > http://mail.python.org/mailman/listinfo/python-list > -- Blog: Http://andreeababiuc.ro Photo Portfolio: http://royaa.daportfolio.com -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Nov 15, 2011, at 12:35 PM, Andreea Babiuc wrote:
>
>
> On 15 November 2011 17:24, Chris Kaynor wrote:
> As with any Python code, you can wrap the import into a try: except block.
>
> try:
> import badModule
> except:
>
>
> pass # Or otherwise handle the exception - possibly importing an
> alternative module.
>
>
> Hmm, I know this might sound silly, but if it fails I still want to import
> the module and disable those lines of code that are related to the reason
> while the module failed to be imported in the first place. Even if that
> makes the code not 100% correct.
>
> Does that make sense ?
It makes sense. It probably also makes sense to only do an "except
ImportError", since if there are other errors (say, syntax errors in a module
you're trying to import, rather than its absence, you probably want to know
about it.
To disable code that won't work without the module you're trying to import, you
can always set flags in your module. For example, I've got a project at work
that can use a variety of communications interfaces, including using PySerial
for serial port comms. But if someone doesn't have PySerial installed, I want
it to fail gracefully and just not support serial. So I can do the following:
try:
import serial
_serial_enabled = True
except ImportError:
print("PySerial not installed - serial ports not supported!")
_serial_enabled = False
And then elsewhere in my module, I can check the value of _serial_enabled to
see if I should e.g. list the serial ports in available communications
interfaces.
Of course, if there's some other error in PySerial (maybe I installed a broken
version with a syntax error?), that error will get propagated up, which is a
good thing, because I'd rather know that PySerial is broken than just have it
tell me it's not installed (which is what would happen if I simply caught all
exceptions). Your mileage may vary.
- Dave
--
http://mail.python.org/mailman/listinfo/python-list
Re: Extracting elements over multiple lists?
On 11/15/2011 12:01 PM, Prasad, Ramit wrote: (Peter's "del" solution is quite close, but I find the 'del' statement tricky in python and will mislead many python newcomers) Can you expand on why 'del' is "tricky"/misleading? Ramit a = someexpression... b = a del a Does not (necessarily) delete the object that a refers to. It merely deletes the symbol a. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: overview on dao
On 15/11/2011 17:26, Prasad, Ramit wrote: Perhaps you should call it "LaoZiDao". I just prefer shorter name. DAO as Data Access Objects is a common acronym in several languages (i.e. Java), so you will continually have this naming conflict. Just be aware that this conflict will happen frequently in the minds of many programmers. Ramit P.S. I vote for PyLaoziDao :P Just don't confuse it with PyDao, which is already taken. :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
David Riley wrote:
On Nov 15, 2011, at 12:35 PM, Andreea Babiuc wrote:
On 15 November 2011 17:24, Chris Kaynor wrote:
As with any Python code, you can wrap the import into a try: except block.
try:
import badModule
except:
pass # Or otherwise handle the exception - possibly importing an
alternative module.
Hmm, I know this might sound silly, but if it fails I still want to import the
module and disable those lines of code that are related to the reason while the
module failed to be imported in the first place. Even if that makes the code
not 100% correct.
Does that make sense ?
It makes sense. It probably also makes sense to only do an "except
ImportError", since if there are other errors (say, syntax errors in a module you're
trying to import, rather than its absence, you probably want to know about it.
To disable code that won't work without the module you're trying to import, you
can always set flags in your module. For example, I've got a project at work
that can use a variety of communications interfaces, including using PySerial
for serial port comms. But if someone doesn't have PySerial installed, I want
it to fail gracefully and just not support serial. So I can do the following:
try:
import serial
_serial_enabled = True
except ImportError:
print("PySerial not installed - serial ports not supported!")
_serial_enabled = False
And then elsewhere in my module, I can check the value of _serial_enabled to
see if I should e.g. list the serial ports in available communications
interfaces.
Of course, if there's some other error in PySerial (maybe I installed a broken
version with a syntax error?), that error will get propagated up, which is a
good thing, because I'd rather know that PySerial is broken than just have it
tell me it's not installed (which is what would happen if I simply caught all
exceptions). Your mileage may vary.
- Dave
If I'm not wrong the OP wants to disable the line *in the module being
imported*, which is kindof silly and doesn't make sense to answer his
question.
Anreea, tell us why the module you are importing is failing and if this
module is yours, we may provide you a proper way to handle this
situation (though I'm pretty sure everything is in Dave's proposal).
JM
PS : @Dave there is a way to avoiding adding symbols to your global
namespace, assign None to the module's name on import errors. Then
before using it, just test the module bool value : if serial:
serial.whateverMethod()
--
http://mail.python.org/mailman/listinfo/python-list
Gossip Protocol in Python
Hi All, I am new to Python. I have to implement a overlay network of around 500 nodes which are arranged as a random graph. To generate theoverlay network I will be using networkx. My query is, is there a way to implement Gossip protocol in my overlay network using Python. Like one node initiated the Gossip of a message, then in how many epoch time it reaches all the nodes in the network. Thanks. Regards, Alisha -- http://mail.python.org/mailman/listinfo/python-list
Wing IDE 4.1.1 released
Hi, Wingware has released version 4.1.1 of Wing IDE, an integrated development environment designed specifically for the Python programming language. Wing IDE is a cross-platform Python IDE that provides a professional code editor with vi, emacs, and other key bindings, auto-completion, call tips, refactoring, context-aware auto-editing, a powerful graphical debugger, version control, unit testing, search, and many other features. **Changes in Version 4.1.1** Highlights of this release include: * Goto-definition on symbols in the shells * Expanded and improved auto-editing support (enable this in the Edit > Keyboard Personality menu): * Auto-closing * Auto-enter invocation args * Apply quote/comment/paren/etc to selection * Auto-enter spaces * Insert EOL and indent for new block * Continue comment on new line * Auto-indent when pasting multi-line text in Python code (undo once restores original indentation) * Improved Smart Tab key option for Python * Indent to Match menu and tool bar items toggle indentation to one indent position lower if already at matching indent level * Improved auto-indent of else, elif, except, and finally * Experimental Turbo auto-completer mode for Python that treats any non-word key as a completion key and Ctrl, Alt, and Command as a cancel keys * Link to docs.python.org in Source Assistant * Include argument names in auto-completer during invocation * About 30 other bug fixes and minor improvements Complete change log: http://wingware.com/pub/wingide/4.1.1/CHANGELOG.txt **New Features in Version 4** Version 4 adds the following new major features: * Refactoring -- Rename/move symbols, extract to function/method, and introduce variable * Find Uses -- Find all points of use of a symbol * Auto-Editing -- Reduce typing burden by auto-entering expected code * Diff/Merge -- Graphical file and repository comparison and merge * Django Support -- Debug Django templates, run Django unit tests, and more * matplotlib Support -- Maintains live-updating plots in shell and debugger * Simplified Licensing -- Includes all OSes and adds Support+Upgrades subscriptions Details on licensing changes: http://wingware.com/news/2011-02-16 **About Wing IDE** Wing IDE is an integrated development environment designed specifically for the Python programming language. It provides powerful editing, testing, and debugging features that help reduce development and debugging time, cut down on coding errors, and make it easier to understand and navigate Python code. Wing IDE can be used to develop Python code for web, GUI, and embedded scripting applications. Wing IDE is available in three product levels: Wing IDE Professional is the full-featured Python IDE, Wing IDE Personal offers a reduced feature set at a low price, and Wing IDE 101 is a free simplified version designed for teaching beginning programming courses with Python. Version 4.0 of Wing IDE Professional includes the following major features: * Professional quality code editor with vi, emacs, and other keyboard personalities * Code intelligence for Python: Auto-completion, call tips, find uses, goto-definition, error indicators, refactoring, context-aware auto-editing, smart indent and rewrapping, and source navigation * Advanced multi-threaded debugger with graphical UI, command line interaction, conditional breakpoints, data value tooltips over code, watch tool, and externally launched and remote debugging * Powerful search and replace options including keyboard driven and graphical UIs, multi-file, wild card, and regular expression search and replace * Version control integration for Subversion, CVS, Bazaar, git, Mercurial, and Perforce * Integrated unit testing with unittest, nose, and doctest frameworks * Django support: Debugs Django templates, provides project setup tools, and runs Django unit tests * Many other features including project manager, bookmarks, code snippets, diff/merge tool, OS command integration, indentation manager, PyLint integration, and perspectives * Extremely configurable and may be extended with Python scripts * Extensive product documentation and How-Tos for Django, matplotlib, Plone, wxPython, PyQt, mod_wsgi, Autodesk Maya, and many other frameworks Please refer to http://wingware.com/wingide/features for a detailed listing of features by product level. System requirements are Windows 2000 or later, OS X 10.3.9 or later (requires X11 Server), or a recent Linux system (either 32 or 64 bit). Wing IDE supports Python versions 2.0.x through 3.2.x and Stackless Python. For more information, see the http://wingware.com/ **Downloads** Wing IDE Professional and Wing IDE Personal are commercial software and require a license to run. A free trial can be obtained directly from the product when launched. Wing IDE Pro -- Full-featured product: http://wingware.com/downloads/wingide/4.1 Wing IDE Personal -- A simplified IDE: http://wingware.com/
Re: suppressing import errors
On Nov 15, 2011, at 1:58 PM, Jean-Michel Pichavant wrote: > PS : @Dave there is a way to avoiding adding symbols to your global > namespace, assign None to the module's name on import errors. Then before > using it, just test the module bool value : if serial: serial.whateverMethod() True, and that does avoid polluting namespace. However, you shouldn't be testing for None as a bool; you should instead do an "if is None:" (or, of course, "is not None"). - Dave -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting elements over multiple lists?
On Wed, Nov 16, 2011 at 5:17 AM, Dave Angel wrote: > a = someexpression... > b = a > > del a > > Does not (necessarily) delete the object that a refers to. It merely > deletes the symbol a. I'd have to classify that as part of the change of thinking necessary for a refcounted language, and not specific to del at all. The del statement is identical to "a = None" in terms of deleting objects; someone who's come from C++ might want to explicitly del every variable before returning, but that's the only way that it's tied to 'del'. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Wed, Nov 16, 2011 at 6:39 AM, David Riley wrote: > True, and that does avoid polluting namespace. However, you shouldn't be > testing for None as a bool; you should instead do an "if is None:" > (or, of course, "is not None"). Why not? Is there some other way for the module object to evaluate as false? ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: (don't bash me too hard) Python interpreter in JavaScript
On Wed, Nov 16, 2011 at 7:37 AM, Passiday wrote: > The app would have basic IDE for writing and debugging the python code, but > the interpretation, of course, would be done in JavaScript. I'd like to avoid > any client-server transactions, so all the interpretation should take place > on the client side. The purpose of all this would be to create educational > platform for learning the programming in python. Hmm. If it's to be an educational platform, I would recommend doing something like the W3Schools "tryit" page [1] and just go back to the server each time. You have potential security issues to watch out for (so it may be worth chrooting your interpreter), but it's sure to be easier than rewriting the entire interpreter in another language. You would have to maintain your implementation as the language evolves, keep it bug-free, etc, etc. ChrisA [1] eg http://www.w3schools.com/html/tryit.asp?filename=tryhtml_basic -- http://mail.python.org/mailman/listinfo/python-list
(don't bash me too hard) Python interpreter in JavaScript
Hello, I am looking for a way how to bring Python interpreter to JavaScript, in order to provide a web-based application with python scripting capabilities. The app would have basic IDE for writing and debugging the python code, but the interpretation, of course, would be done in JavaScript. I'd like to avoid any client-server transactions, so all the interpretation should take place on the client side. The purpose of all this would be to create educational platform for learning the programming in python. I hoped somebody already had done something like this, but I couldn't google up anything. I've found some crazy project emulating PC in JavaScript (and even running Linux on top of it), but not a python interpreter. Of course, I could take the python source and brutally recode it in JavaScript, but that seems like awful lot of work to do. Any ideas how I should proceed with this project? -- http://mail.python.org/mailman/listinfo/python-list
Re: (don't bash me too hard) Python interpreter in JavaScript
On Tue, Nov 15, 2011 at 1:37 PM, Passiday wrote: > Hello, > > I am looking for a way how to bring Python interpreter to JavaScript, in > order to provide a web-based application with python scripting capabilities. > The app would have basic IDE for writing and debugging the python code, but > the interpretation, of course, would be done in JavaScript. I'd like to avoid > any client-server transactions, so all the interpretation should take place > on the client side. The purpose of all this would be to create educational > platform for learning the programming in python. > > I hoped somebody already had done something like this, but I couldn't google > up anything. I've found some crazy project emulating PC in JavaScript (and > even running Linux on top of it), but not a python interpreter. You could take a look at pyjamas, but it's precompiled. I don't know whether they have support for runtime compilation at all. -- http://mail.python.org/mailman/listinfo/python-list
Re: (don't bash me too hard) Python interpreter in JavaScript
On 15-11-2011 21:37, Passiday wrote: Hello, I am looking for a way how to bring Python interpreter to JavaScript, in order to provide a web-based application with python scripting capabilities. The app would have basic IDE for writing and debugging the python code, but the interpretation, of course, would be done in JavaScript. I'd like to avoid any client-server transactions, so all the interpretation should take place on the client side. The purpose of all this would be to create educational platform for learning the programming in python. I hoped somebody already had done something like this, but I couldn't google up anything. I've found some crazy project emulating PC in JavaScript (and even running Linux on top of it), but not a python interpreter. Of course, I could take the python source and brutally recode it in JavaScript, but that seems like awful lot of work to do. Any ideas how I should proceed with this project? skulpt ? cheers, Stef -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Nov 15, 2011, at 3:01 PM, Chris Angelico wrote: > On Wed, Nov 16, 2011 at 6:39 AM, David Riley wrote: >> True, and that does avoid polluting namespace. However, you shouldn't be >> testing for None as a bool; you should instead do an "if is None:" >> (or, of course, "is not None"). > > Why not? Is there some other way for the module object to evaluate as false? Well, probably not. It was my understanding that "None" evaluating to a Boolean false was not necessarily guaranteed; I've even gotten some warnings from Python to that effect, though I can't recall the context in which that happened. In any case, PEP 8 states: Comparisons to singletons like None should always be done with 'is' or 'is not', never the equality operators. Also, beware of writing "if x" when you really mean "if x is not None" -- e.g. when testing whether a variable or argument that defaults to None was set to some other value. The other value might have a type (such as a container) that could be false in a boolean context! Obviously, that last bit doesn't apply to modules; they're not going to evaluate as False in general. I just bristle when I see people writing "if x" when they really mean "if x is not None", perhaps because it's not The Right Way(tm)? It mostly comes down to aesthetics, I guess. Write what you really mean. - Dave -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Wed, Nov 16, 2011 at 8:20 AM, David Riley wrote: > Comparisons to singletons like None should always be done with > 'is' or 'is not', never the equality operators. > > Also, beware of writing "if x" when you really mean "if x is not None" > -- e.g. when testing whether a variable or argument that defaults to > None was set to some other value. The other value might have a type > (such as a container) that could be false in a boolean context! It's probably quicker to execute "if x is None" than "if x" (presumably the former just compares the two pointers). On the other hand, it's more compact to leave off the "is None". And on the gripping hand, neither "quicker to execute" nor "more compact" equates to "more Pythonic". ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On 15 November 2011 21:34, Chris Angelico wrote: > On Wed, Nov 16, 2011 at 8:20 AM, David Riley wrote: >> Comparisons to singletons like None should always be done with >> 'is' or 'is not', never the equality operators. >> >> Also, beware of writing "if x" when you really mean "if x is not None" >> -- e.g. when testing whether a variable or argument that defaults to >> None was set to some other value. The other value might have a type >> (such as a container) that could be false in a boolean context! > > It's probably quicker to execute "if x is None" than "if x" > (presumably the former just compares the two pointers). On the other > hand, it's more compact to leave off the "is None". And on the > gripping hand, neither "quicker to execute" nor "more compact" equates > to "more Pythonic". It's idiomatic to write "x is None" when you want to know whether x is None. -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Tue, Nov 15, 2011 at 2:42 PM, Arnaud Delobelle wrote: > It's idiomatic to write "x is None" when you want to know whether x is None. It's also idiomatic to just write "if x:" when you want to know whether x is something or nothing, and that's what I would probably do here. Either is correct. -- http://mail.python.org/mailman/listinfo/python-list
Re: (don't bash me too hard) Python interpreter in JavaScript
On 11/15/2011 3:52 PM, Ian Kelly wrote: On Tue, Nov 15, 2011 at 1:37 PM, Passiday wrote: Hello, I am looking for a way how to bring Python interpreter to JavaScript, in order to provide a web-based application with python scripting capabilities. The app would have basic IDE for writing and debugging the python code, but the interpretation, of course, would be done in JavaScript. I'd like to avoid any client-server transactions, so all the interpretation should take place on the client side. The purpose of all this would be to create educational platform for learning the programming in python. I hoped somebody already had done something like this, but I couldn't google up anything. I've found some crazy project emulating PC in JavaScript (and even running Linux on top of it), but not a python interpreter. You could take a look at pyjamas, but it's precompiled. I don't know whether they have support for runtime compilation at all. Perhaps one could use pyjamas to compile pypy to javascript ;-). -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Tue, Nov 15, 2011 at 1:34 PM, Chris Angelico wrote: > On Wed, Nov 16, 2011 at 8:20 AM, David Riley wrote: >> Comparisons to singletons like None should always be done with >> 'is' or 'is not', never the equality operators. >> >> Also, beware of writing "if x" when you really mean "if x is not None" >> -- e.g. when testing whether a variable or argument that defaults to >> None was set to some other value. The other value might have a type >> (such as a container) that could be false in a boolean context! > > It's probably quicker to execute "if x is None" than "if x" > (presumably the former just compares the two pointers). On the other > hand, it's more compact to leave off the "is None". And on the > gripping hand, neither "quicker to execute" nor "more compact" equates > to "more Pythonic". I decided to run some tests to see which is faster. As is turns out, in simple cases (eg, True), "if x: pass" is faster than "if x is None: pass" if x is True, and otherwise its the same. If x is a custom type (I only tested a simple custom class written in Python), "if x is None: pass" is significantly faster. Overall, performance-wise, it is irrelevant - use the code that is the most clear in the situation. Only if there is a custom type involved, and then only if that type defines Python code to be executed, does it matter. The tests (the code is shown later - its about 53 lines, with lots of copy+paste...): 1a: 0.04 usec/pass -- if None: pass 1b: 0.03 usec/pass -- if True: pass 1c: 0.27 usec/pass -- if customObjectWithNonZero: pass 1d: 0.04 usec/pass -- if customObjectNoNonZero: pass 2a: 0.04 usec/pass -- if None is None: pass 2b: 0.04 usec/pass -- if True is None: pass 2c: 0.04 usec/pass -- if customObjectWithNonZero is None: pass 2d: 0.04 usec/pass -- if customObjectNoNonZero is None: pass The tests were run on Python 2.6x64 on Windows: 2.6.4 (r264:75706, Aug 4 2010, 17:00:56) [MSC v.1500 64 bit (AMD64)] The code: import timeit def test(): numRuns = 1000 statement1 = 'if x: pass' statement2 = 'if x is None: pass' setup1 = 'x = None' setup2 = 'x = True' setup3 = ''' class Test(object): def __nonzero__(self): return True x = Test()''' setup4 = ''' class Test(object): pass x = Test()''' t1a = timeit.Timer(stmt=statement1, setup=setup1) t1b = timeit.Timer(stmt=statement1, setup=setup2) t1c = timeit.Timer(stmt=statement1, setup=setup3) t1d = timeit.Timer(stmt=statement1, setup=setup4) t2a = timeit.Timer(stmt=statement2, setup=setup1) t2b = timeit.Timer(stmt=statement2, setup=setup2) t2c = timeit.Timer(stmt=statement2, setup=setup3) t2d = timeit.Timer(stmt=statement2, setup=setup4) a1 = [] b1 = [] c1 = [] d1 = [] a2 = [] b2 = [] c2 = [] d2 = [] for i in xrange(10): a1.append(100 * t1a.timeit(number=numRuns)/numRuns) b1.append(100 * t1b.timeit(number=numRuns)/numRuns) c1.append(100 * t1c.timeit(number=numRuns)/numRuns) d1.append(100 * t1d.timeit(number=numRuns)/numRuns) a2.append(100 * t2a.timeit(number=numRuns)/numRuns) b2.append(100 * t2b.timeit(number=numRuns)/numRuns) c2.append(100 * t2c.timeit(number=numRuns)/numRuns) d2.append(100 * t2d.timeit(number=numRuns)/numRuns) print "1a: %.2f usec/pass" % (sum(a1) / len(a1),) print "1b: %.2f usec/pass" % (sum(b1) / len(b1),) print "1c: %.2f usec/pass" % (sum(c1) / len(c1),) print "1d: %.2f usec/pass" % (sum(d1) / len(d1),) print "2a: %.2f usec/pass" % (sum(a2) / len(a2),) print "2b: %.2f usec/pass" % (sum(b2) / len(b2),) print "2c: %.2f usec/pass" % (sum(c2) / len(c2),) print "2d: %.2f usec/pass" % (sum(d2) / len(d2),) > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting elements over multiple lists?
On Tue, 15 Nov 2011 17:01:23 +, Prasad, Ramit wrote: > Can you expand on why 'del' is "tricky"/misleading? People often imagine that the del statement sends a message to the object "please delete yourself", which then calls the __del__ method. That is incorrect. "del x" is an unbinding operation, it removes the *name* "x" from the current namespace. As a side-effect, if the object which was bound to x no longer has any other references to it, then the garbage collector will delete it and __del__ may be called. (I say "may be called" rather than "will" because there are circumstances where __del__ methods won't get called, such as during interpreter shutdown.) On the other hand, "del x[i]" does work like the way people expect. It deletes items from collections (lists, dicts, etc.) and does so by calling the method x.__delitem__(i). This also may cause the garbage collector to delete the object which was at x[i] if that was the last reference to that object. CPython's implementation keeps a count of references for each object, and the garbage collector deletes the object immediately that reference count reaches zero. This is fast, simple, deterministic (objects will be predictably deleted as soon as they can be), but simple-minded, and so it is aided by a second garbage collector which runs periodically, looking for reference cycles. You can set how often this second garbage collector runs using the gc module. Jython uses the Java garbage collector, and IronPython the .Net garbage collector. Neither are reference counters, and (as far as I know) neither guarantees that objects will be deleted as soon as they are free to be deleted. They will be deleted whenever the garbage collector gets around to it. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting elements over multiple lists?
On Wed, 16 Nov 2011 06:53:26 +1100, Chris Angelico wrote: > On Wed, Nov 16, 2011 at 5:17 AM, Dave Angel wrote: >> a = someexpression... >> b = a >> >> del a >> >> Does not (necessarily) delete the object that a refers to. It merely >> deletes the symbol a. > > I'd have to classify that as part of the change of thinking necessary > for a refcounted language, and not specific to del at all. Languages aren't refcounted. Or at least, *Python* isn't a refcounted language. CPython is a refcounted implementation. IronPython and Jython are not. del behaves exactly the same in IronPython and Jython as it does in CPython: it removes the name, which may have a side-effect of deleting the object. > The del > statement is identical to "a = None" in terms of deleting objects; I'm not entirely sure what you arr trying to say here. I *think* you are trying to say is this: Given that `a` is bound to my_object initially, `del a` from the point of view of my_object is no different from re-binding a to some other object such as None (or any other object). which is true as far as it goes, but it fails to note that the name "a" no longer exists after `del a` while it does exist after `a = None`. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Tue, 15 Nov 2011 14:22:21 -0800, Chris Kaynor wrote: > The tests (the code is shown later - its about 53 lines, with lots of > copy+paste...): Holy unnecessarily complicated code Batman! This is much simpler: [steve@ando ~]$ python -m timeit -s "x = None" "if x is None: pass" 1000 loops, best of 3: 0.0738 usec per loop [steve@ando ~]$ python -m timeit -s "x = True" "if x is None: pass" 1000 loops, best of 3: 0.0799 usec per loop The difference is too small to be significant. If I run the same tests multiple times, the winner could easily change. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting elements over multiple lists?
On Wed, Nov 16, 2011 at 9:25 AM, Steven D'Aprano
wrote:
> Languages aren't refcounted. Or at least, *Python* isn't a refcounted
> language. CPython is a refcounted implementation. IronPython and Jython
> are not. del behaves exactly the same in IronPython and Jython as it does
> in CPython: it removes the name, which may have a side-effect of deleting
> the object.
Yes, I was sloppy there. A non-manually-memory-managed language, if
you will; it's part of Python's spec that you do NOT have to
explicitly release objects you're no longer using.
>> The del
>> statement is identical to "a = None" in terms of deleting objects;
>
> I'm not entirely sure what you arr trying to say here. I *think* you are
> trying to say is this:
>
> Given that `a` is bound to my_object initially, `del a`
> from the point of view of my_object is no different
> from re-binding a to some other object such as None
> (or any other object).
>
> which is true as far as it goes, but it fails to note that the name "a"
> no longer exists after `del a` while it does exist after `a = None`.
Right. Both actions have the same effect wrt deleting my_object; the
only connection between Python's "del" and C++'s "delete" is that,
which del shares with "a = None".
The fact is that, regardless of the Python implementation, deleting
*objects* is not the programmer's responsibility. The only thing he
can or must do is delete *names*.
del a
del globals()['a']
globals().__delitem__('a')
are all roughly equivalent (assuming that a is global). Maybe this is
the best way to explain it - that you're deleting from a "dictionary"
(which may or may not actually be implemented as a dict) of local
names.
ChrisA
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Re: suppressing import errors
On 11/15/2011 4:20 PM, David Riley wrote:
...
None was set to some other value. The other value might have a type
(such as a container) that could be false in a boolean context!
Obviously, that last bit doesn't apply to modules; they're not going to evaluate as False in
general. I just bristle when I see people writing "if x" when they really mean "if
x is not None", perhaps because it's not The Right Way(tm)? It mostly comes down to
aesthetics, I guess. Write what you really mean.
Actually Dave, as your quote from PEP 8 says, the difference is real.
It's not just aesthetics.
Consider this:
x = None
if x:
print('if x == true')
else:
print('if x == false')
if x is None:
print('x is None == true')
else:
print('x is none == false')
y = ''
if y:
print('if y == true')
else:
print('if y == false')
if y is None:
print('y is None == true')
else:
print('y is none == false')
The result is:
if x == false
x is None == true
if y == false
y is none == false
Alan
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Re: (don't bash me too hard) Python interpreter in JavaScript
On 11/15/2011 3:37 PM, Passiday wrote: Hello, I am looking for a way how to bring Python interpreter to JavaScript, in order to provide a web-based application with python scripting capabilities. The app would have basic IDE for writing and debugging the python code, but the interpretation, of course, would be done in JavaScript. I'd like to avoid any client-server transactions, so all the interpretation should take place on the client side. The purpose of all this would be to create educational platform for learning the programming in python. I hoped somebody already had done something like this, but I couldn't google up anything. I've found some crazy project emulating PC in JavaScript (and even running Linux on top of it), but not a python interpreter. Of course, I could take the python source and brutally recode it in JavaScript, but that seems like awful lot of work to do. Any ideas how I should proceed with this project? I don't have any good ideas for how to do this, but I do have a warning. The JavaScript security model prohibits a lot of things that Python does not prohibit. So if you need to do anything like access a file on the user's machine or talk to some computer other than the one you came from, it won't work. Alan -- http://mail.python.org/mailman/listinfo/python-list
Re: suppressing import errors
On Nov 15, 2011, at 5:59 PM, Alan Meyer wrote: > On 11/15/2011 4:20 PM, David Riley wrote: > ... >> None was set to some other value. The other value might have a type >> (such as a container) that could be false in a boolean context! >> >> Obviously, that last bit doesn't apply to modules; they're not going to >> evaluate as False in general. I just bristle when I see people writing "if >> x" when they really mean "if x is not None", perhaps because it's not The >> Right Way(tm)? It mostly comes down to aesthetics, I guess. Write what you >> really mean. > > Actually Dave, as your quote from PEP 8 says, the difference is real. It's > not just aesthetics. I guess I meant it's aesthetics when it comes down to determining whether a module is None or not; a module is never going to evaluate to False under any feasible circumstances. It's not an aesthetic difference when you consider that the global (or local) namespace may be polluted with other variables that have the same name as your module, but then your evaluation would be entirely invalid anyway. But yes, in the general case, it's much more than an aesthetic difference, which is why I always write "if x is None" when I want to know if it's None (rather than False, 0, [], "", etc). I have been bitten way too many times by doing the lazy thing to keep doing it. - Dave -- http://mail.python.org/mailman/listinfo/python-list
redis beginner question
Hi, I'm reading the redis documentation and there is one thing that bothers me. For redis, you need to start a server on localhost. Is there an easy way that my Python script starts this server automatically? Before using my script, I don't want to start redis-server each time. When my program terminates, the server could be shut down automatically. Thanks, Laszlo -- http://mail.python.org/mailman/listinfo/python-list
Re: (n00b) Tkinter trouble
On Tue, Nov 15, 2011 at 12:32 AM, Chris Angelico wrote: > > As a general rule, if any parent is invisible, you won't see the > child, and if any parent is disabled, you can't access the child. Yea, I'm becoming more familiar and comfortable with the GUI hierarchy as I play around. I do like how simple it is to test a concept in Tkinter (just a couple lines builds you a window with any kind of widget you want). > You > may find that there's even a one-line command that will disable the > window, open a new window, wait for the new window to close, and > automatically reenable the window - an "open modal dialog" function or > something. > Apparently I could not do what I was wanting to (state=DISABLED is not a valid option to Toplevel). What I wanted to do was something similar to what the dialogs were doing from tkMessageBox. The window didn't appear changed, but no buttons could be clicked. After looking through the tkMessageBox.py source code, I found the method I was looking for: grab_set. Essentially, I just have to have my new window call its grab_set() method to hog all events. Not really "disabling" the root window (which is why I had a hard time finding it on Google), but it's the exact behavior I was looking for. http://www.python-forum.org/pythonforum/viewtopic.php?f=15&t=4930 was helpful here. The only other approach I (successfully) tried was to use the .withdraw() method on the window during the constructor of the *new* window and execute .deiconify() on it during the new window's destroy() method (before calling Toplevel's destroy on self). I still like the first way better. Thanks! Jason -- http://mail.python.org/mailman/listinfo/python-list
Re: (don't bash me too hard) Python interpreter in JavaScript
On Tuesday, November 15, 2011 12:37:03 PM UTC-8, Passiday wrote: > Hello, > > I am looking for a way how to bring Python interpreter to JavaScript, in > order to provide a web-based application with python scripting capabilities. > The app would have basic IDE for writing and debugging the python code, but > the interpretation, of course, would be done in JavaScript. I'd like to avoid > any client-server transactions, so all the interpretation should take place > on the client side. The purpose of all this would be to create educational > platform for learning the programming in python. > > I hoped somebody already had done something like this, but I couldn't google > up anything. I've found some crazy project emulating PC in JavaScript (and > even running Linux on top of it), but not a python interpreter. > > Of course, I could take the python source and brutally recode it in > JavaScript, but that seems like awful lot of work to do. Any ideas how I > should proceed with this project? Some people have already made an LLVM-to-Javascript compiler, and have managed to build Python 2.7 with it. The LLVM-to-Javascript project is called emscripten. https://github.com/kripken/emscripten/wiki Demo of Python (and a bunch of other languages) here: http://repl.it/ Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: redis beginner question
In article , Jabba Laci wrote: > Hi, > > I'm reading the redis documentation and there is one thing that > bothers me. For redis, you need to start a server on localhost. Is > there an easy way that my Python script starts this server > automatically? Before using my script, I don't want to start > redis-server each time. When my program terminates, the server could > be shut down automatically. > > Thanks, > > Laszlo Why do you want to stop redis after your program terminates? Generally, you just start redis up when the system boots and leave it running. -- http://mail.python.org/mailman/listinfo/python-list
python shell that saves history of typed in commands that will persist between reboots
Hi, Using Windows. Is there a python shell that has a history of typed in commands? I don't need output of commands just what I typed it. I need it to save between sessions - something that no shell seems to do. If I reboot there will still be a command history somewhere. Like bash history in Linux. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: (n00b) Tkinter trouble
On Wed, Nov 16, 2011 at 2:02 PM, Jason Swails wrote: > Apparently I could not do what I was wanting to (state=DISABLED is not a > valid option to Toplevel). What I wanted to do was something similar to > what the dialogs were doing from tkMessageBox. Yes, that would be what you'd want. I wonder, though: Is Toplevel the right window class? There may be a better class for a subwindow. Again, I'm not familiar with Tkinter, but a quick google suggests that Frame or Window might be worth looking into. Ideally, you want the window to disable its parent and claim all events. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: python shell that saves history of typed in commands that will persist between reboots
Maybe you're looking for ipython? History, tab-complete, sort of things in it. goldtech wrote: > Hi, > > Using Windows. Is there a python shell that has a history of typed in > commands? > > I don't need output of commands just what I typed it. I need it to > save between sessions - something that no shell seems to do. If I > reboot there will still be a command history somewhere. > > Like bash history in Linux. > > Thanks -- http://mail.python.org/mailman/listinfo/python-list
Stucked with python logging module
I just scaned through the beginer's guide of logging module, but I
can't get anything from console. The demo just like this:
import logging
logging.debug("This is a demo")
Maybe I should do sth to put the log to stdout in basicConfig first?
Thanks in advance
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Re: Stucked with python logging module
On Wed, Nov 16, 2011 at 8:58 AM, sword wrote:
> I just scaned through the beginer's guide of logging module, but I
> can't get anything from console. The demo just like this:
>
> import logging
> logging.debug("This is a demo")
>
> Maybe I should do sth to put the log to stdout in basicConfig first?
Actually, the problem is not of the output location, but of the
logging level. In the default configuration, logs at DEBUG level are
suppressed. logging.basicConfig will be a simple way to change this.
Are you following the logging documentation at
http://docs.python.org/py3k/howto/logging.html#logging-basic-tutorial?
This page is part of the documentation of the logging module, and is
suitable for first-time logging module users.
In your case, you can do this:
import logging
logging.basicConfig(level=logging.DEBUG)
logging.debug("This is a demo")
--
regards,
kushal
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Got some problems when using logging Filter
The logging cookbook gives an Filter example, explainning how to add
contextural info to log. I can't figure out how to filter log from it.
Suppose I have 3 file, a.py, b.py and main.py
#file: a.py
import logging
logger=logging.getLogger(__name__)
def print_log():
logger.debug("I'm module a")
#file: b.py just like a.py
import logging
logger=logging.getLogger(__name__)
def print_log():
logger.debug("I'm module b")
#file: main.py
import logging
from logging import Filter
logging.basicConfig(level=logging.DEBUG)
logger=logging.getLogger("main")
logger.debug("This is main process")
logger.addFilter(Filter("a"))
And I expected that the console output would contain main and b module
log only. But it turned out that all logs there. Is it the problem of
root logger?
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Re: (don't bash me too hard) Python interpreter in JavaScript
Thanks Carl, this looks like a good base to start from. -- http://mail.python.org/mailman/listinfo/python-list
Re: (don't bash me too hard) Python interpreter in JavaScript
Of course, I am aware of this. But the file system can be emulated, and certain networking can be mediated via the server, too. But for starts, I don't plan to go beyond the basic file operations, if at all. -- http://mail.python.org/mailman/listinfo/python-list
