Installing python-gnutls on Windows
Hi, I'm new to python and would like to request your help installing python-gnutls on windows. Are there binaries available which can be installed ? Looks like the setup.py file which came with the package is for Debian. I tried modifying it for windows but am still getting errors. get_options() is not getting the include directories and libraries so I harcoded the include directories. I'm getting the following error now: //--- C:\Development\python\python-gnutls-1.1.8>python setup.py build -- compiler=mingw32 running build running build_py running build_ext building 'gnutls.library._gnutls_init' extension Traceback (most recent call last): File "setup.py", line 86, in libraries='-lgnutls -lgnutls-extra')]) File "C:\Python26\lib\distutils\core.py", line 152, in setup dist.run_commands() File "C:\Python26\lib\distutils\dist.py", line 975, in run_commands self.run_command(cmd) File "C:\Python26\lib\distutils\command\build_ext.py", line 471, in build_exte nsions self.build_extension(ext) ... depends=ext.depends) File "C:\Python26\lib\distutils\ccompiler.py", line 689, in compile depends, extra_postargs) File "C:\Python26\lib\distutils\ccompiler.py", line 363, in _setup_compile "'include_dirs' (if supplied) must be a list of strings" TypeError: 'include_dirs' (if supplied) must be a list of strings //- I would really appreciate your help Thanks Ramg -- http://mail.python.org/mailman/listinfo/python-list
Python configuration question when python scripts are executed using Appweb as web server.
Hi All
I have installed python 2.6.2 in windows xp professional machine. I
have set the following environment variables -- PYTHONPATH. It points
to following windows folders: python root folder, the lib folder and
lib-tk folder. I have configured IIS to execute python scripts.
I do not have any issues executing python scripts from the python
interpreter window or from the browser using IIS as the web server.
However, when I use the open source Appweb web browser to execute
python scripts. It is able to execute only simple script without
issues. For example, hello.py executes fine.
hello.py
#!/usr/bin/env python
print "Content-type: text/html\n\n"
print "Hello world!"
However I am not able to execute python scripts that contain import
statements. I need to point out here that i do not have issue with
using os or sys packages. When I tried to execute the sample client
script that came with the gnutls wrapper for python, I got error. I
narrowed it down to the "from ... import" line in the example.
from gnutls.crypto import *
from gnutls.connection import *
Next I modified it to the functions used in the client python scripts
(NOTE: I have added some additional functions to connection and crypto
python scripts).
from gnutls.crypto import X509Certificate, X509PrivateKey, X509CRL
from gnutls.connection import AnonClientCred
Next step, in order to debug, I used the module finder to see what is
happening. To being with I used the module finder to find out the
modules loaded for the simple script hello.py.
hello2.py
#!/usr/bin/env python
import modulefinder
import pdb
pdb.set_trace()
finder = modulefinder.ModuleFinder()
finder.run_script('hello.py')
print "Content-type: text/html\n\n"
print ""
print sys.exc_info()
print 'Loaded modules:'
for name, mod in finder.modules.iteritems():
print '%s: ' % name,
print ','.join(mod.globalnames.keys()[:3])
print '-'*50
print 'Modules not imported:'
print '\n'.join(finder.badmodules.iterkeys())
print ""
I got the error. Please see below for error as captured from Appweb
logs. See lines 3 to 5.
cgi:5 main 356: CGI Response: read 89 bytes
cgi:6 main 356: Data is:
> c:\appweb\web\hello2.py(9)()
-> finder = modulefinder.ModuleFinder()
(Pdb)
cgi:5 main 356: CGI Response: read 0 bytes
cmd:7 main getExitCode: process 0, code 1
default:1 main Error: 503 "Service Unavailable" for "/hello2.py",
file "c:/appweb/web/hello2.py": CGI process /hello2.py: exited
abnormally with exit code: 1
request:5 main 356: flushOutput: background 0
Once again, let me stress that this issue is happening only when I use
appweb as the web server.
Some details on Appweb that I found out: Appweb opens up a new console
process and executes the python scripts. See sample below:
cmd:5 pool.0 Running: C:\Dev\Ironic\Tools\Python26\python.exe c:/
appweb/web/hello2.py
When python scripts are executed in this fashion, should there be
additional command line arguments be passed? Am I missing any
additional settings. Also can you help with improving the debugging
lines in hello2.py so that I can identify the issue.
Please help.
Thanks.
Ram G.
--
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Re: Python configuration question when python scripts are executed using Appweb as web server.
On Aug 3, 8:42 pm, "Gabriel Genellina" wrote:
> En Mon, 03 Aug 2009 11:04:07 -0300, IronyOfLife
> escribió:
>
> > I have installed python 2.6.2 in windows xp professional machine. I
> > have set the following environment variables -- PYTHONPATH. It points
> > to following windows folders: python root folder, the lib folder and
> > lib-tk folder.
>
> Why? Did you read it somewhere? Usually there is no need to set the
> PYTHONPATH variable at all; remove it.
>
> > I have configured IIS to execute python scripts.
>
> > I do not have any issues executing python scripts from the python
> > interpreter window or from the browser using IIS as the web server.
>
> Try again after PYTHONPATH is removed, and make sure you can import all
> the required modules from the Python console. Only then try to run the cgi
> scripts.
>
> > However, when I use the open source Appweb web browser to execute
> > python scripts. It is able to execute only simple script without
> > issues. [...]However I am not able to execute python scripts that
> > contain import
> > statements. I need to point out here that i do not have issue with
> > using os or sys packages. When I tried to execute the sample client
> > script that came with the gnutls wrapper for python, I got error. I
> > narrowed it down to the "from ... import" line in the example.
>
> > from gnutls.crypto import *
> > from gnutls.connection import *
>
> Check that the above lines work fine from inside the Python console.
> If not, something went wrong when you installed the gnutls Python package.
>
> > Next step, in order to debug, I used the module finder to see what is
> > happening. To being with I used the module finder to find out the
> > modules loaded for the simple script hello.py.
>
> Debugging cgi scripts isn't easy sometimes; try adding this line at the
> start of your script:
>
> import cgitb;cgitb.enable()
>
> You should get a nicely formatted stack trace whenever an exception is
> raised. If you get an HTTP error instead (like 500 Internal Server Error)
> it's likely a syntax error, you must fix it before continuing.
> Then, you may find that modulefinder is no more needed.
>
> > import pdb
> > pdb.set_trace()
>
> pdb cannot work inside a CGI script; remove that.
>
> > Once again, let me stress that this issue is happening only when I use
> > appweb as the web server.
>
> I don't know appweb, but if you first make sure the script works from the
> command line, it should be much easier to make it work in the web server.
>
> --
> Gabriel Genellina
Hi Gabriel
Thanks for your reply.
As I had mentioned in my original post, I am able to successfully
execute gnutls client python script while using python interpreter and
from the web browser while using IIS as web server. The scripts were
not executing successfully only when I used AppWeb as web server.
Setting PYTHONPATH environment variables is mentioned in Python docs.
I figured out how to get the debug statements to write to Appweb logs
and from there I found out the issue to be ImportError. Python does
provide a very cryptic error message. "(, ImportError('DLL load failed: The specified
module could not be found.',), )"
I then downloaded filemon (as suggested in another forum) utility tool
for windows environment. Using the tool I found that python.exe is
trying to load gnutls related dlls from system path and a list of
folders (I dont know why it didnt try to pick up the dlls from all the
path provided in PATH environment variable) none of which contain the
gnutls related dlls.
I solved the issue temporarily by copying the gnutls related dlls to
the path searched by python.exe
Now my gnutls client python script executes successfully when i use
Appweb as the web server,
NOTE: When I use python interpreter or IIS as webserver the path where
python.exe looks for gnutls related dll's are different. In this
scenario python.exe is able to successfully load the required dlls.
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Re: Python configuration question when python scripts are executed using Appweb as web server.
Hi Gabriel On Aug 5, 4:18 pm, "Gabriel Genellina" wrote: > En Tue, 04 Aug 2009 10:15:24 -0300, IronyOfLife > escribió: > > > On Aug 3, 8:42 pm, "Gabriel Genellina" wrote: > >> En Mon, 03 Aug 2009 11:04:07 -0300, IronyOfLife > >> escribió: > > >> > I have installed python 2.6.2 in windows xp professional machine. I > >> > have set the following environment variables -- PYTHONPATH. It points > >> > to following windows folders: python root folder, the lib folder and > >> > lib-tk folder. > > >> Why? Did you read it somewhere? Usually there is no need to set the > >> PYTHONPATH variable at all; remove it. > > > Setting PYTHONPATH environment variables is mentioned in Python docs. > > Could you provide a link please? Setting PYTHONPATH should not be Here are couple of links that discusses setting PYTHONPATH environment variable. http://docs.python.org/using/windows.html http://www.daimi.au.dk/~chili/PBI/pythonpath.html > necesary, and in fact it's a very bad idea. Environment variables are > global, but Python modules may depend on the Python version, architecture, > install location... By example, you may install a 64 bits Python 3.1 > version *and* a 32 bits Python 2.5 version and they both can coexist > peacefully - but an extension module compiled for the former cannot be > used in the later version. You must build a separate library for each > version, and install them in two separate directories. But since the > PYTHONPATH variable is shared by all installations, which directory should > contain? > It's best not to use PYTHONPATH at all and rely on other alternatives > (like .pth files, that are searched relative to the current Python > executable, so different versions use different configuration files) I understand your concerns regarding setting of PYTHONPATH while multiple versions of Python are installed on the same machine. My fix however does not use PYTHONPATH. The GNUTLS wrapper module for PYTHON loads the GNUTLS dll's and it was not able to find them. Using FileMon (win tool) I found out the paths that are scanned and I copied the dlls to one of such paths. I still do not like this fix. This is a temporary solution. Can you explain maybe with some sample how to set .pth files? Maybe this will resolve my issue. > > > I solved the issue temporarily by copying the gnutls related dlls to > > the path searched by python.exe > > Glad to see you could finally fix it! > > -- > Gabriel Genellina Thanks very much for your reply. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python configuration question when python scripts are executed using Appweb as web server.
Hi Gabriel Thanks for the detailed and useful reply. On Aug 7, 1:37 am, "Gabriel Genellina" wrote: > En Thu, 06 Aug 2009 12:49:30 -0300, IronyOfLife > escribió: > > > > > > > On Aug 5, 4:18 pm, "Gabriel Genellina" wrote: > >> En Tue, 04 Aug 2009 10:15:24 -0300, IronyOfLife > >> escribió: > >> > On Aug 3, 8:42 pm, "Gabriel Genellina" wrote: > >> >> En Mon, 03 Aug 2009 11:04:07 -0300, IronyOfLife > >> > >> >> escribió: > > >> >> > I have installed python 2.6.2 in windows xp professional machine. I > >> >> > have set the following environment variables -- PYTHONPATH. It > >> points > >> >> > to following windows folders: python root folder, the lib folder > >> and > >> >> > lib-tk folder. > > >> >> Why? Did you read it somewhere? Usually there is no need to set the > >> >> PYTHONPATH variable at all; remove it. > > >> > Setting PYTHONPATH environment variables is mentioned in Python docs. > > >> Could you provide a link please? Setting PYTHONPATH should not be > > > Here are couple of links that discusses setting PYTHONPATH environment > > variable. > >http://docs.python.org/using/windows.html > > Ouch, that document should be reworked and updated! > > >http://www.daimi.au.dk/~chili/PBI/pythonpath.html > > That's mostly obsolete for current versions. Since PEP370 [0] was > implemented, a per-user private directory is already in sys.path now, so > there is no need to play with PYTHONPATH. Thanks for the clarification on PYTHONPATH. > > > I understand your concerns regarding setting of PYTHONPATH while > > multiple versions of Python are installed on the same machine. My fix > > however does not use PYTHONPATH. The GNUTLS wrapper module for PYTHON > > loads the GNUTLS dll's and it was not able to find them. Using FileMon > > (win tool) I found out the paths that are scanned and I copied the > > dlls to one of such paths. I still do not like this fix. This is a > > temporary solution. > > Note that this cannot be fixed from inside Python. When you import a > module, the interpreter scans the directories in ITS search path > (sys.path) looking for a matching module. Once the module is found: > - if it is a Python file, it's executed > - if it is an extension module (a .pyd file, in fact a .dll renamed) it's > loaded using LoadLibraryEx (a Windows function), and finally its > initialization routine is executed. > > For LoadLibrary to successfully load the module, all its external > references must be resolved. That is, Windows must locate and load all > other DLLs that this module depends on, using its own search strategy [1], > taking into account the PATH environment variable and many other places. > > It is at this stage that you get the error: when the gnutls wrapper > attempts to load the gnutls DLL. That search is done by Windows, not by > Python, and PYTHONPATH has nothing to do with it. > > Why different results in IIS and appweb? Note that there exist several > search strategies, they depend on the application home directory, the > location of the .exe, whether SetDllDirectory was called or not, whether > the application has a manifest or not, a .local file or not... Hard to > tell with so many variables. This is fairly easy to explain. When I configured IIS to execute python scripts, as per the documentation I pass two command line arguments. Appweb works this way. It opens up a new command process and in the function parameter for environment it sets only SYSTEMROOT. It does not set the PATH variable (A BUG IN APPWEB which I have passed on to them. They have not commented or provided any work around) for Windows platform. So while loading the gnutls client script is loaded, the following path is searched 1. gnutls\library 2. C:\windows 3. C:\WIndows\system 4. C:\WIndows\system32 5. Folder where pyhton.exe is present. And when I use IIS, the PATH variable is also set. So in this case all the folders in the PATH are also searched and LoadLibrary is able to successfully find the GNUTLS related Dlls without any issues. You were mentioning about .local file or manifest file to specify the path. I used the python's build command to build the wrapper. Is there a way to mention in setup.py to generate the .manifest file? I wold very much appreciate if you can help me with that. I will also look for answers for how to modify setup.py to generate manifest file or .local file etc.. > > > Can you explain maybe with some sample how to set .pth files? Maybe > > this will resolve my issu
