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List of modules available for import inside Python?

Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
import.modules
Also, is there anything like Cpan for Python?
Aug 28 '08 #1
16 6731
On Wed, Aug 27, 2008 at 9:21 PM, ssecorp <ci**********@gmail.comwrote:
Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
import.modules
Also, is there anything like Cpan for Python?
The closest thing would be PyPI (the Python Package Index)
[http://pypi.python.org/pypi], and easy_install (a package manager for
Python) [http://peak.telecommunity.com/DevCenter/EasyInstall].

- Chris
========
Follow the path of the Iguana...
Rebertia: http://rebertia.com
Blog: http://blog.rebertia.com
--
http://mail.python.org/mailman/listinfo/python-list
Aug 28 '08 #2
On Thu, Aug 28, 2008 at 2:21 PM, ssecorp <ci**********@gmail.comwrote:
Also, is there anything like Cpan for Python?
Try the Python Cheese Shop / PyPi

http://pypi.python.org/pypi

cheers
James

--
--
-- "Problems are solved by method"
Aug 28 '08 #3
ssecorp wrote:
Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
import.modules
there's a helper script in the 2.5 source code kit that locates all
existing standard modules:

http://svn.python.org/projects/pytho...listmodules.py

to get all modules, remove the for-loop that follows after the comment
"get rid of site packages".

also see:

http://effbot.org/zone/listmodules-cgi.htm

</F>

Aug 28 '08 #4
On Aug 28, 6:21*am, ssecorp <circularf...@gmail.comwrote:
Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
Try:
>>help()
helpmodules
Please wait a moment while I gather a list of all available modules...
<snip>
Aug 28 '08 #5
On Aug 28, 12:21 am, ssecorp <circularf...@gmail.comwrote:
Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
import.modules

Also, is there anything like Cpan for Python?
Isn't the most obvious answer to the first question this link?

http://docs.python.org/modindex.html
Aug 28 '08 #6
pr*******@latinmail.com wrote:
>Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
import.modules

Also, is there anything like Cpan for Python?

Isn't the most obvious answer to the first question this link?
depends on whether you want a list of the modules that you might be able
to import, or the modules that are actually present on your system.

</F>

Aug 28 '08 #7
On Aug 27, 11:04*pm, Fredrik Lundh <fred...@pythonware.comwrote:
ssecorp wrote:
Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:
import.modules

there's a helper script in the 2.5 source code kit that locates all
existing standard modules:

http://svn.python.org/projects/pytho...listmodules.py

to get all modules, remove the for-loop that follows after the comment
"get rid of site packages".

also see:

http://effbot.org/zone/listmodules-cgi.htm

</F>
I like to direct new users to pydoc's built-in HTTP server:

import pydoc
pydoc.gui()
(then click the 'open browser' button)
Aug 28 '08 #8
Am Thu, 28 Aug 2008 11:23:01 -0700 schrieb Jason Scheirer:
>
I like to direct new users to pydoc's built-in HTTP server:

import pydoc
pydoc.gui()
(then click the 'open browser' button)
Now, this is cool !

Thanks a lot!

Martin

Aug 28 '08 #9
Michele Simionato wrote:
On Aug 28, 6:21Â*am, ssecorp <circularf...@gmail.comwrote:
>Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:

Try:
>>>help()
helpmodules
Please wait a moment while I gather a list of all available modules...
<snip>
This looks like it could be a useful tool, but when I try it
I get the following:

Please wait a moment while I gather a list of all available modules...

/usr/lib/python2.5/site-packages/reportlab/lib/PyFontify.py:35:
Warning: 'with' will become a reserved keyword in Python 2.6
/usr/lib/python2.5/site-packages/reportlab/lib/PyFontify.py:36:
Warning: 'with' will become a reserved keyword in Python 2.6
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.5/site.py", line 346, in __call__
return pydoc.help(*args, **kwds)
File "/usr/lib/python2.5/pydoc.py", line 1645, in __call__
self.interact()
File "/usr/lib/python2.5/pydoc.py", line 1663, in interact
self.help(request)
File "/usr/lib/python2.5/pydoc.py", line 1679, in help
elif request == 'modules': self.listmodules()
File "/usr/lib/python2.5/pydoc.py", line 1797, in listmodules
ModuleScanner().run(callback)
File "/usr/lib/python2.5/pydoc.py", line 1848, in run
for importer, modname, ispkg in pkgutil.walk_packages():
File "/usr/lib/python2.5/pkgutil.py", line 110, in walk_packages
__import__(name)
File "/usr/local/lib/python2.5/site-packages/PIL/__init__.py", line 1342,
in <module>

File "/usr/local/lib/python2.5/site-packages/PIL/__init__.py", line 927,
in main

UnboundLocalError: local variable 'given_files' referenced before assignment
>>>
which could be because I am fairly free and unrestrained when
it comes to installing stuff, and I see now I have modules
on both /usr/lib/python2.5 and /usr/local/lib/python2.5

Apparently python knows about them both, but I don't know I
haven't introduced an incompatibility somewhere...and that PIL
package showing up at the tail of the errors was one of my
more recent additions...

Any help will be appreciated,

sc

Sep 6 '08 #10
En Sat, 06 Sep 2008 17:18:55 -0300, clurker <no****@spamhaters.comescribió:
Michele Simionato wrote:
>On Aug 28, 6:21*am, ssecorp <circularf...@gmail.comwrote:
>>Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:

Try:
>>>>help()
helpmodules
Please wait a moment while I gather a list of all available modules...
<snip>

This looks like it could be a useful tool, but when I try it
I get the following:

Please wait a moment while I gather a list of all available modules...
[...]
File "/usr/local/lib/python2.5/site-packages/PIL/__init__.py", line 1342,
in <module>

File "/usr/local/lib/python2.5/site-packages/PIL/__init__.py", line 927,
in main

UnboundLocalError: local variable 'given_files' referenced before assignment
>>>>
Unfortunately the "modules" help command actually imports all the available packages, and a buggy one may stop the whole process with an error.
Apparently python knows about them both, but I don't know I
haven't introduced an incompatibility somewhere...and that PIL
package showing up at the tail of the errors was one of my
more recent additions...
If import of a package fails, the error reported is not accurate. In this case, probably some other package failed, that itself imported PIL. Line 927 in PIL/__init__.py does not exist.

A quick fix is to replace line 1854 in pydoc.py (ModuleScanner.run) with this one:

for importer, modname, ispkg in pkgutil.walk_packages(onerror=lambda name:None):

(the onerror argument makes it to ignore all errors)

--
Gabriel Genellina

Sep 7 '08 #11
sc
Gabriel Genellina wrote:
En Sat, 06 Sep 2008 17:18:55 -0300, clurker <no****@spamhaters.com>
escribió:
>Michele Simionato wrote:
>>On Aug 28, 6:21Â*am, ssecorp <circularf...@gmail.comwrote:
Is there a way to view all the modules I have available for import
from within Python?
Like writing in the interpreter:

Try:

>help()
helpmodules
Please wait a moment while I gather a list of all available modules...
<snip>

This looks like it could be a useful tool, but when I try it
I get the following:

Please wait a moment while I gather a list of all available modules...
[...]
> File "/usr/local/lib/python2.5/site-packages/PIL/__init__.py", line
1342,
in <module>

File "/usr/local/lib/python2.5/site-packages/PIL/__init__.py", line
927,
in main

UnboundLocalError: local variable 'given_files' referenced before
assignment
>>>>>

Unfortunately the "modules" help command actually imports all the
available packages, and a buggy one may stop the whole process with an
error.
>Apparently python knows about them both, but I don't know I
haven't introduced an incompatibility somewhere...and that PIL
package showing up at the tail of the errors was one of my
more recent additions...

If import of a package fails, the error reported is not accurate. In this
case, probably some other package failed, that itself imported PIL. Line
927 in PIL/__init__.py does not exist.

A quick fix is to replace line 1854 in pydoc.py (ModuleScanner.run) with
this one:

for importer, modname, ispkg in
pkgutil.walk_packages(onerror=lambda name:None):

(the onerror argument makes it to ignore all errors)
nice Gabriel, thanx! At least now "help(); modules" gives me a beautiful
list -- I guess I'll find out what the buggy module is if/when I try
to use it...(all PIL/__init__.py is is about 15 lines of comments
(referencing a README I can't find))

sc

Sep 7 '08 #12
A quick fix is to replace line 1854 in pydoc.py (ModuleScanner.run) with
this one:
* * * * for importer, modname, ispkg in
* * * * pkgutil.walk_packages(onerror=lambda name:None):
(the onerror argument makes it to ignore all errors)
well not all, for example
GLUT: Fatal Error in summon: could not open display: :0.0

So to refine the question:
how can I list all modules that might be importable on my system,
without actually importing them all ?

(How about a "pydoc2" that's well thought out, doesn't crash ...
let me ask more knowledgable people, what's a good small help system
as model ?
)

cheers
-- denis

Sep 10 '08 #13
de*****@t-online.de wrote:
how can I list all modules that might be importable on my system,
without actually importing them all ?
I'm pretty sure I mentioned a way to do that back when this thread was
opened. let's see, yes, here it is:

....

there's a helper script in the 2.5 source code kit that locates all
existing standard modules:

http://svn.python.org/projects/pytho...listmodules.py

to get all modules, remove the for-loop that follows after the comment
"get rid of site packages".

also see:

http://effbot.org/zone/listmodules-cgi.htm

....

</F>

Sep 10 '08 #14
On Sep 10, 1:45*pm, Fredrik Lundh <fred...@pythonware.comwrote:
deni...@t-online.de wrote:
* *how can I list all modules that might be importable on my system,
* *without actually importing them all ?

I'm pretty sure I mentioned a way to do that back when this thread was
opened. *let's see, yes, here it is:

...

there's a helper script in the 2.5 source code kit that locates all
existing standard modules:

http://svn.python.org/projects/pytho...listmodules.py

to get all modules, remove the for-loop that follows after the comment
"get rid of site packages".
I have just tried the following on my Ubuntu box with the system
Python:

~$ python /usr/lib/python2.5/doc/tools/listmodules.py
/usr/lib/python2.5/doc/tools/listmodules.py:99: DeprecationWarning:
the rgbimg module is deprecated
__import__(m)

** (process:24863): WARNING **: AT_SPI_REGISTRY was not started at
session startup.

** (process:24863): WARNING **: Could not locate registry
location: /usr/lib/xulrunner-1.9.0.1/libxpcom.so
before 3
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning: cannot
register existing type `GtkSourceStyleScheme'
__import__(m)
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning:
g_type_set_qdata: assertion `node != NULL' failed
__import__(m)
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning: cannot
register existing type `GtkSourceBuffer'
__import__(m)
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning:
g_type_get_qdata: assertion `node != NULL' failed
__import__(m)
Segmentation fault

Interesting, isn't it?

Michele Simionato
Sep 10 '08 #15
Michele Simionato wrote:
I have just tried the following on my Ubuntu box with the system
Python:

~$ python /usr/lib/python2.5/doc/tools/listmodules.py
/usr/lib/python2.5/doc/tools/listmodules.py:99: DeprecationWarning:
the rgbimg module is deprecated
__import__(m)

** (process:24863): WARNING **: AT_SPI_REGISTRY was not started at
session startup.

** (process:24863): WARNING **: Could not locate registry
location: /usr/lib/xulrunner-1.9.0.1/libxpcom.so
before 3
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning: cannot
register existing type `GtkSourceStyleScheme'
__import__(m)
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning:
g_type_set_qdata: assertion `node != NULL' failed
__import__(m)
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning: cannot
register existing type `GtkSourceBuffer'
__import__(m)
/usr/lib/python2.5/doc/tools/listmodules.py:99: Warning:
g_type_get_qdata: assertion `node != NULL' failed
__import__(m)
Segmentation fault

Interesting, isn't it?
it does indeed import modules found in the path if they appear to be
Python C extensions. why Ubuntu puts badly written C modules in their
default Python path is more than I can tell...

</F>

Sep 10 '08 #16
On 2008-09-10, de*****@t-online.de <de*****@t-online.dewrote:
(snip) ...

So to refine the question:
how can I list all modules that might be importable on my system,
without actually importing them all ?

(How about a "pydoc2" that's well thought out, doesn't crash ...
let me ask more knowledgable people, what's a good small help system
as model ?
)


I'm constantly finding myself wishing for this feature -
something of the "apropos"/"whatis" of the linux shell (and debian's
"apt-cache search" and "apt-cache show" which allow you to search
and query before you install).
(Matlab's "help" and "lookfor" commands cover this too.)

Is there a reason this type of information hasn't been made available
by default in the help system?
I'm constantly using find, grep and Usenet to find out what python tools
I can use.

Anita

Sep 10 '08 #17

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