Hi,
> But the problem is that by specifying the type as ctypes.c_char_p,
> ctypes will hide that pointer from you and return a Python object
> instead. I'm not sure how ctypes is doing it under the hood, but I
> suspect ctypes is doing it's own strdup of the string on conversion, and
> managing t
> Does ctypes, when using restype, frees allocated memory?
>
> For example, will the memory allocated by "strdup" be freed after the "del"
> statement? If not, how can I free it?
I've tried the following program and I'm more confused now :) Can anyone
explain the output?
---
import ctypes
im
Hi,
Does ctypes, when using restype, frees allocated memory?
For example, will the memory allocated by "strdup" be freed after the "del"
statement? If not, how can I free it?
---
import ctypes
libc = ctypes.cdll.LoadLibrary('libc.so.6')
strdup = libc.strdup
strdup.argtypes = [ctypes.c_char_p]
Changed to self.get_ext_full_path(ext.name) and it works now.
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Hi,
I'm playing around with generating extension moudle to Python in Go. This is
for a blog post - not production ready.
The Go code is compiled to a shared library and the Python module is using
ctypes to call the Go code in the shared library. I know it's know a classic
extension module with
> Anyone know where can I look in the Python source code to investigate
> this?
Probably around
https://github.com/python/cpython/blob/master/Objects/floatobject.c
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Hi,
> Would be grateful if you could post it to python-authors also:
> https://mail.python.org/mailman/listinfo/python-authors
Done. Though list seems very dormant.
Thanks,
Miki
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Hi All,
I'm excited that my book "Python Brain Teasers: 30 brain teasers to tickle your
mind and help become a better developer." is out.
You can grab is from https://gum.co/iIQT (PDF & ePUB). Let me know how many
teasers did you get right.
If you're curious, a sample of the book, including th
Hi,
> Where is the correct interpreter?
> I have installed python several times
> Pycharm all ways selects
>
> C:\ProgramFiles\JetBrains\PyCharm Community Edition 2019.3.3\bin\pycharm64.exe
This is the PyCharm executable, not the Python one. See
https://www.jetbrains.com/help/pycharm/configuring
If you're trying to access the machine from another machine, you need to change
the host to '0.0.0.0'. 'localhost' is the internal interface.
On Sunday, August 19, 2018 at 10:36:25 PM UTC+3, Νίκος wrote:
> Hello,
>
> i just installed bottle and flask web frameworks in my CentOS environment but
Hi,
PyCon Israel 2018 call for papers is open, submit a talk today, another three
tomorrow :)
See more at http://il.pycon.org/2018/
All the best,
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You need to set the Python interpreter for the project to be the Anaconda one.
See https://www.jetbrains.com/help/pycharm/configuring-python-interpreter.html
On Monday, November 27, 2017 at 1:56:58 AM UTC+2, C W wrote:
> Hello all,
>
> I am a first time PyCharm user. I have Python 3 and Anaconda i
You need to set the Python interpreter for the project to be the Anaconda one.
See https://www.jetbrains.com/help/pycharm/configuring-python-interpreter.html
On Monday, November 27, 2017 at 1:56:58 AM UTC+2, C W wrote:
> Hello all,
>
> I am a first time PyCharm user. I have Python 3 and Anaconda
Hi,
Just wanted to share a project I'm working on. It a super fast serverless that
support Python handlers as well.
Check out more at https://www.iguazio.com/nuclio-new-serverless-superhero/
Code at https://github.com/nuclio/nuclio/
Happy hacking,
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Can you show us some of the code you tried?
On Monday, June 26, 2017 at 10:19:46 AM UTC+3, Bhaskar Dhariyal wrote:
> Hi everyone!
>
> I have a dataset which I want to make model trainable. I ahve been trying to
> do some thing for past 2-3 days.
>
> Actually I wanted to clean 'desc' and 'keywo
Hi All,
The second PyCon Israel will take place June 11-14, 2017.
* 11 June Django girls workshop at Red Hat Israel offices in Raanana
* 12-13 June PyCon Israel main event at Wohl center
* 14 June PyCon Israel workshops and sprints
We still have some sponsorship spots available, great recruiting
You can do this with pandas:
import pandas as pd
from io import StringIO
io = StringIO('''\
idABCDE
10010000
10101100
10210
> for row in cus:
>print(row.budget_code)
>
>
> NameError: name 'budget_code' is not defined
You'll need to use a DictCursor to be able to access rows by name and not
position (which IMO is the preferred way).
cus = conn.cursor(pymysql.cursors.DictCursor)
cus.execute("SELECT * FROM
On Tuesday, June 21, 2016 at 2:03:28 PM UTC+3, Pushpanth Gundepalli wrote:
> Guys, can you please share me some sites where we can practice python
> programs for beginners and Intermediate.
IMO you can do that at https://www.codecademy.com/learn/python
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> Is there a way to get hourly weather forecast data (temperature,
> chance of precipitation) from the command line in Debian Linux?
If you Google for "weather API" you'll find several sites who give programmatic
access to weather data.
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Greetings,
The first PyCon Israel is happening! It's taking place on May 2-3, 2016, will
be attended by hundreds of Pythonistas, and is sponsored by major international
and local companies that use Python as part of their daily work.
CFP is open, please head over to http://il.pycon.org/2016/ to
> When I enter into the command window "pip install matplotlib", it reads this
> below (this is not the full version of it):
> ...
Installing scientific packages can be a pain. I recommend you take a look at
https://www.continuum.io/downloads
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Hi,
> config = {id: 1, canvas: (3840, 1024), comment: "a comment",
> {id: 4, gate: 3, (0,0, 1280, 1024)},
> {id: 5, gate: 2, (1280, 0, 2560, 1024)},
> {id: 6, gate: 1, (2560, 0, 3840, 1024)}}
This is not valid Python. Are you trying to have a list of d
> I been trying to compile matplotlib in a python3.4 virtual env using
> pip version 1.7 on Fedora 22. I am in about 3 weeks learning python
> and Django so I am not clear on the error response to:
> ...
> File "/usr/lib64/python3.4/distutils/version.py", line 343, in _cmp
> if self
On Thursday, September 10, 2015 at 1:11:59 PM UTC+3, chen...@inhand.com.cn
wrote:
> hi:
> I have to use numpy package. My python runs on my embedded arm
> device. So, how do i cross compile numpy?
conda has support for ARM - http://continuum.io/blog/new-arch
BTW: I suggest you write a better
Greetings,
> 0. Classes where Idle is used:
> Where?
At client site. Mostly big companies.
> Level?
>From beginner to advanced.
> Idle users:
> 1. Are you
> grade school (1=12)?
> undergraduate (Freshman-Senior)?
> post-graduate (from whatever)?
post-graduate
> 2. Are you
> beginner (1st class,
> What are your best time saving tips when programming Python?
* Use the REPL. Write small chunks of code and test them as you go
* Know what's available in the standard library (sets, Counter, deque ...)
* Learn how to pick good packages from PyPI (community, last commit ...)
* import this
--
htt
> >The forums at https://sourceforge.net/p/pypi/support-requests/ (which is
> >linked from "PyPI Support") seems pretty deserted. What is the right
> >location for these kind of issues?
> That is one place.
> https://bitbucket.org/pypa/pypi/issues
Thanks!
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Greetings,
After confirming email I can't login to PyPI with the password and when trying
to rest I get: user "Cyberint" is unknwon to me. However when trying to
re-register it says the user is already there.
The forums at https://sourceforge.net/p/pypi/support-requests/ (which is linked
from
> If anyone may kindly suggest what is the error I am doing.
It's close to impossible to know without seeing the server side code.
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Thanks Chris, I was hitting the wrong URL by mistake.
Didn't think an extra / will make all that difference :)
On Tuesday, March 10, 2015 at 2:12:13 PM UTC+2, Chris Angelico wrote:
> On Tue, Mar 10, 2015 at 10:55 PM, Steven D'Aprano
> wrote:
> > Miki Tebeka wro
Greetings,
$ time curl -I https://pypi.python.org/pypi/
HTTP/1.1 200 OK
Date: Tue, 10 Mar 2015 10:24:30 GMT
...
Content-Length: 9870689
curl -I https://pypi.python.org/pypi/ 0.02s user 0.00s system 2% cpu
12.271 total
$
Note the long time (for comparison hitting pyth
Thanks for all the answers!
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Greetings,
I've compiled a list of "python -m" tools at
pythonwise.blogspot.com/2015/01/python-m.html.
Did I miss something? What are your favorite "python -m" tools?
Thanks,
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Greetings,
> I'm a beginner of python, I just want your help.
We'll gladly do it, however you need to invest some time and write better
questions :) See http://www.catb.org/esr/faqs/smart-questions.html
> How can I get the Failure values from the Console in to a txt or a csv file?
We need more i
Greetings,
> I'd like to build a web site for myself, essentially a "vanity" web site to
> show off whatever web development skills I have, and perhaps do some
> blogging. I'm a Python developer, so I'd like to develop the site with the
> following stack:
> web applications written with Python
Greetings,
> I am trying to run this snippet of code.
>
> from pandas.io.data import DataReader
> ...
>
> I keep getting this error.
>
> Traceback (most recent call last):
>
> File "C:\Python27\download_dow.py", line 1, in
>
> from pandas.io.data import DataReader
>
> ImportError: No
Greetings,
On Wednesday, September 24, 2014 5:57:15 PM UTC+3, Ian wrote:
> Then your result depends on the order of your input, which is usually
> not a good thing.
As stated in previous reply - I'm OK with that.
> Why would you need to determine the *number* of bins in advance? You
> just need t
On Tuesday, September 23, 2014 7:33:06 PM UTC+3, Rob Gaddi wrote:
> While you're at it, think
> long and hard about that definition of fuzziness. If you can make it
> closer to the concept of histogram "bins" you'll get much better
> performance.
The problem for me here is that I can't determin
On Tuesday, September 23, 2014 4:37:10 PM UTC+3, Peter Otten wrote:
> x eq y
> y eq z
> not (x eq z)
>
> where eq is the test given above -- should x, y, and z land in the same bin?
Yeah, I know the counting depends on the order of items. But I'm OK with that.
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Greetings,
Before I start writing my own. Is there something like collections.Counter
(fore frequencies) that does "fuzzy" matching?
Meaning x is considered equal to y if abs(x - y) < epsilon. (x, y and my case
will be numpy.array).
Thanks,
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Greetings,
> I should've mentioned that I want to import my csv as a data frame or numpy
> array or as a table.
If you know the max length of a row, then you can do something like:
def gen_rows(stream, max_length):
for row in csv.reader(stream):
yield row + ([None] * (max_
Greetings,
> there is only one line in mydown.py .
>
>
> import requests
> ...
> >>> import mydown
> >>> requests.get(url)
>
> Traceback (most recent call last):
>
> File "", line 1, in
>
> NameError: name 'requests' is not defined
You need to call mydown.requests, but I think you're mi
Greetings,
> >>> import pandas as pd
>
> No module named numpy
I find the most painless way of installing the Python scientific stack is using
Anaconda
http://continuum.io/downloads
HTH,
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Greetings,
> The installation went through successfully, however I
> noticed that some of the _*.so files did not get built under
> lib/python2.6/lib-dynload/ folder (eg _sha256.so) , which is likely the reason
> why my setuptools install failed due to the error:
I believe you need the developer l
> Is there a library for Python that can easily create flowcharts using a
> simple API?
Maybe https://code.google.com/p/pydot/ ?
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Greetings,
> So, what's the best practice here? How do people deal with the false
> positives? Is there some way to annotate the source code to tell
> pyflakes to ignore something?
We use flake8 (pyflakes + pep8) as pre step for the tests. We fail the tests on
any output from flake8.
flake8
Greetings,
> Ok, so I have an issue with cleaning up threads upon a unexpected exit.
What do you mean by "unexpected exit"? Uncaught exception? SIGTERM? ...
> Using atexit doesn't work because it's called after the daemon threads are
> killed.
I don't follow. Who is killing the daemon threads?
> (If you don't know what the strop
> module is, go ahead and forget it now.)
+1 QOTW :)
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> I have seen by chance a number of years ago a book on Python programming
> for running on mobile phones (of a certain producer only). What is the
> current state of the art in that? Could someone kindly give a few good
> literature references? Thanks in advance.
I'm not an expert, but take a look
>> How do you deal with tests (both on dev machine and Jenkins) that need
>> credentials (such as AWS keys)?.
> I've done several of these. Another option that may work in some
> contexts is to mock the test altogether;
Thanks, but mocking is last resort for me, it reduces the value of testing
gr
Greetings,
How do you deal with tests (both on dev machine and Jenkins) that need
credentials (such as AWS keys)?. I know of the following methods:
1. Test user with known (stored in source control) limited credentials
2. ~/.secrets (or any other known location) RC file which is not in source
c
Greetings,
http://pypi2u.appspot.com/ is a simple service that notifies you on new
versions of packages you're interested in.
You can view the code, fill bugs and suggest ideas at
https://bitbucket.org/tebeka/pypi2u
Hope you find it useful,
--
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> I want to develop a instant message server, simply has user and group
> entity.
> Is there any better existing open-source one?
> Thus I can download and have a look.
You can take a look at Twisted Words
(https://twistedmatrix.com/trac/wiki/TwistedWords).
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IIRC creating a directory is atomic in most environments.
On Sunday, February 9, 2014 2:39:51 AM UTC-8, Asaf Las wrote:
> Hi
>
>
>
> Which one is most recommended to use for mutex alike locking to
>
> achieve atomic access to single resource:
>
>
>
> - fcntl.lockf
>
> - os.open() with O_
> Thank you that's nicer, but ifiilterfalse is not in Python 3 (could
>
> use filter of course).
It was renamed to filterfalse -
http://docs.python.org/3.3/library/itertools.html#itertools.filterfalse
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On Saturday, February 1, 2014 6:12:28 AM UTC-8, andrea crotti wrote:
> I'm giving a talk tomorrow @Fosdem about generators/iterators/iterables..
>
>
>
> The slides are here (forgive the strange Chinese characters):
>
> https://dl.dropboxusercontent.com/u/3183120/talks/generators/index.html#3
>
> I want that print "hello" should appear on screen as well as get saved in a
> log file.
> How can I accomplish this?
There are many ways to do this, here's one:
class MultiWriter(object):
def __init__(self, *writers):
self.writers = writers
self.isatty = False
def write
On Wednesday, November 20, 2013 6:36:56 AM UTC-8, Alec Taylor wrote:
> Anyway, here is the link: https://github.com/rauhryan/huboard
I thought you wanted a Python bases solution.
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> Can you recommend an open source project (or two) written in Python;
> which covers multi project + sub project issue tracking linked across
> github repositories?
Don't know if it covers all what you need, but http://trac.edgewall.org/ is
written in Python, and has many, many plugins.
--
https
On Tuesday, October 29, 2013 10:48:58 AM UTC-7, Barry Warsaw wrote:
> So too has my latest stint as Python Release Manager. Over the 19 years I
> have been involved with Python,
Thanks Barry for all the hard work.
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> Wouldn't it
> better to add a feature to Python to write the name of DLL which load
> has been failed?
If you start Python with the -v (verbose) flag, you can see all the calls to
dlopen.
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> Is it possible with argparse to have this syntax for a script?
> my-script (-a -b VALUE-B | -c -d VALUE-D)
>
> I would like to do this with the argparse module.
You can probably do something similar using sub commands
(http://docs.python.org/2/library/argparse.html#sub-commands).
--
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> Is there an import / distutils tutorial out there? I'm looking for it, but
> perhaps one of you already knows where to find it. Thanks!
Did you have a look at http://docs.python.org/3.3/distutils/examples.html?
Another thing to do is to look at what other packages on PyPi are doing.
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On Wednesday, June 12, 2013 8:59:44 PM UTC-7, Ranjith Kumar wrote:
> I'm looking for speech to text conversation python library for linux and mac
Not a Python library, but maybe you can work with
http://cmusphinx.sourceforge.net/
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> Now! I have written a python script . I want to call a golang script in
> python script.
> Who can give me some advices?
See http://gopy.qur.me/extensions/examples.html and
http://www.artima.com/weblogs/viewpost.jsp?thread=333589
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> I already have the .so files compiled.
http://docs.python.org/2/distutils/setupscript.html#installing-package-data ?
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> Basically, I'd like to know how to create a proper setup.py script
http://docs.python.org/2/distutils/setupscript.html
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> I want to use spline interpolation function from SciPy in an application and
> at the same time, I don't want the end user to have to install SciPy
> separately.
You can pack you application with py2exe, pyinstaller ... and then they won't
even need to install Python.
Another option (which is
> > You understand that this will result in a chunk of text that is not JSON?
> I think he means something like this:
> >>> json.dumps([float('nan')])
> '["N/A"]'
That's exactly what I mean :)
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[Roland]
> yes, there is: subclass+extend the JSON-encoder, see pydoc json.
Please read the original post before answering. What you suggested does not
work since NaN is of float type.
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> >>> I'm trying to find a way to have json emit float('NaN') as 'N/A'.
> Easiest way is probably to transform your object before you try to write
Yeah, that's what I ended up doing. Wondered if there's a better way ...
Thanks,
--
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>> I'm trying to find a way to have json emit float('NaN') as 'N/A'.
> No. There is no way to represent NaN in JSON. It's simply not part of the
> specification.
I know that. I'm trying to emit the *string* 'N/A' for every NaN.
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Greetings,
I'm trying to find a way to have json emit float('NaN') as 'N/A'.
I can't seem to find a way since NaN is a float, which means overriding
"default" won't help.
Any simple way to do this?
Thanks,
--
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> Pynguin is a python-based turtle graphics application.
I wonder why Pynguin does not get more traction in the teaching sector. Looks
ideal for teaching kids.
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> I have a CSV file with 20 rows and 12 columns and I need to store it as a
> matrix.
If you can use pandas, the pandas.read_csv is what you want.
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> I can't even read that mess... three nested lambda?
I have to say this and other answers in this thread seem not that friendly to
me.
The OP said it's a newbie question, we should be more welcoming to newcomers.
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> I am a newbie to python
Welcome! I hope you'll do great things with Python.
> and am trying to write a program that does a
> sum of squares of numbers whose squares are odd.
OK.
> For example, for x from 1 to 100, it generates 165 as an output (sum
> of 1,9,25,49,81)
I don't follow, you seem to
> I can catch the exception, but don't see any way to tell which row caused the
> problem. Is this information obtainable, short of retrying each row one by
> one?
One way to debug this is to wrap the iterable passed to executemany with one
that remembers the last line. Something like:
cla
> Fianlly my cgi .py script doesnt produce any more errors, i think i ahve
> correct them but it present a blank screen
> Any idea why?
Please post the code to the script, otherwise we can't help you.
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> I'm trying to update to both 2.7.3 and Numpy 1.7.0.
Updating Python is from python.org
If you're on 64bit windows, see http://www.lfd.uci.edu/~gohlke/pythonlibs/
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> I would like to know what are the top 10 most important features (on your
> opinion) in python.
You're in luck :) Raymond Hettinger just gave "Python is Awesome" keynote at
PyCon. You can view the slides at
https://speakerdeck.com/pyconslides/pycon-keynote-python-is-awesome, video will
follow
> can anybody point out a situation where you really need
> itertools.filterfalse() ?
Sometimes you get the predicate as a parameter to another function. This way if
you want to filter out things you can easily do it. Other language (such as
Clojure) have a "complement" function that removes th
> I'm wondering if there's a utility for Python to build GUIs.
IIRC the Qt builder can generate Python code.
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On Thursday, January 24, 2013 2:34:45 AM UTC-8, mik...@gmail.com wrote:
> On Thursday, January 24, 2013 9:43:31 AM UTC, Hazard Seventyfour wrote:
> > for all senior can you suggest me the best, friendly and easy use with nice
> > GUI editor for me, and have many a good features such as auto comple
On Monday, January 7, 2013 8:20:28 PM UTC-8, iMath wrote:
> How to get the selected text of the webpage in chrome through python ?
You can probably use selenium to do that.
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On Sunday, January 6, 2013 8:03:43 AM UTC-8, marc.assin wrote:
> I wonder how I could specify a parameter on the command line from
> within the interpreter.
Guido wrote some advice a while back -
http://www.artima.com/weblogs/viewpost.jsp?thread=4829
Import your module and call its main.
The oth
On Sunday, January 6, 2013 5:57:17 AM UTC-8, RueTheDay wrote:
> I am getting the following error when running on Python 2.7 on Ubuntu
> 12.04:
> >>
>
> AttributeError: 'Series' object has no attribute 'str'
I would *guess* that you have an older version of pandas on your Linux machine.
Try "p
On Thursday, December 20, 2012 10:27:54 PM UTC-8, Isml wrote:
> I want to compile python 3.3 with bz2 support on RedHat 5.5 but fail to
> do that. Here is how I do it:
> 1. download bzip2 and compile it(make、make -f Makefile_libbz2_so、make
> install)
Why can't you use yum? (yum install li
On Thursday, December 20, 2012 2:11:45 PM UTC-8, Jack Silver wrote:
> I have two Linux From Scratch machine.
> Hence, I do not need to install all those libraries on the client machine.
> Right ?
It depends on what the client needs. For example if you use zlib compression in
the protocol, you'll
On Wednesday, December 19, 2012 6:38:30 AM UTC-8, Thomas Bach wrote:
> On Wed, Dec 19, 2012 at 05:47:30AM -0800, hugocoolens wrote:
> > ['0.0364771 0.55569', '0.132688 0.808496', '0.232877 0.832833',
> > '0.332702 0.849128', '0.432695 0.862158']
> xs = [ float(x) for x, _ in map(str.split, l) ]
> y
On Thursday, December 13, 2012 7:03:27 AM UTC-8, Daniel Laird wrote:
> I do am import unittest2 as unittest
> NameError: global name 'assertListEqual' is not defined
According to the docs
(http://docs.python.org/2/library/unittest.html#unittest.TestCase.addTypeEqualityFunc)
assertListEqual and f
On Saturday, December 8, 2012 12:22:35 PM UTC-8, Jason Hsu wrote:
> 1. How do I run my Python script in Google App Engine and make the output
> results.csv file publicly available?
Probably https://developers.google.com/appengine/docs/python/blobstore/,
however
https://developers.google.com/app
On Thursday, December 6, 2012 2:15:53 PM UTC-8, subhaba...@gmail.com wrote:
> I am looking for some example of implementing Cosine similarity in python. I
> searched for hours but could not help much. NLTK seems to have a module but
> did not find examples.
Should be easy with numpy:
import
> In other words I need a mini, simple browser;
> something I can build that will open, read and
> display a saved html file.
If you want to view the "raw" HTML, use any editor.
If you want to view the rendered HTML (like in a browser), you can point your
favorite browser to a local file or use
On Wednesday, December 5, 2012 11:14:42 AM UTC-8, Jason Hsu wrote:
> make the *.csv files publicly available to read.
> Can this be done on Heroku? I've gone through the tutorial, but it seems to
> be geared towards people who want to create a whole web site.
See one option -
http://stackoverfl
On Wednesday, December 5, 2012 9:57:31 AM UTC-8, Daniel Doo wrote:
> I am new to Python. Is there a method to “join” two pipe delimited files
> using a unique key that appears in both files?
Have a look at Panda's concat
(http://pandas.pydata.org/pandas-docs/dev/merging.html). It also have util
On Tuesday, December 4, 2012 11:04:15 AM UTC-8, subhaba...@gmail.com wrote:
> >>> cl = HierarchicalClustering(data, lambda x,y: abs(x-y))
> but now I want to visualize it if any one suggest how may I use
> visualization(like matplotlib or pyplot etc.) to see the data?
One option is to use a scatte
On Wednesday, November 28, 2012 4:38:35 AM UTC-8, dach...@gmail.com wrote:
> Thanks.. Creating two subprocesses worked for me. I did the code as below,
Glad it worked.
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On Tuesday, November 27, 2012 8:45:56 PM UTC-8, Roy Smith wrote:
> In the future, the plan is to build a complete fresh virtualenv for
> every deployment. But we're not there yet.
Maybe a repository of virtualenvs, then when deploying you can see if there's
one the matches what you need and use
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