[Tutor] Danny's __std__ module

[tpc@csua.berkeley.edu]

hi Danny, yes it works now.

On Wed, 28 May 2003, Danny Yoo wrote:

>
>
> On Wed, 28 May 2003 tpc@csua.berkeley.edu wrote:
>
>
> > hi Danny, I was curious: when you made this module did you intend for it
> > to be called only when you name a file after a standard module, or for
> > general everyday use?
>
> Hello!
>
> The first case: when someone is forced to name a program with the same
> name as something from the Standard Library, __std__ is a way to do it.
> In almost all cases, __std__ is completely unnecessary, so I don't expect
> to see it in widespread use.  *grin*
>
>
>
> > I ask because I am writing a script and when I called your module in my
> > script and then tried to run it I got:
> >
> > [tpc@nike htdocs]# ./text2decimalascii.py hello world
> > Traceback (most recent call last):
> >   File "./text2decimalascii.py", line 2, in ?
> >     from __std__ import sys
> > ImportError: cannot import name sys
>
>
> ??!  Yikes!  I did expect that to work.  That's a bug on the part of the
> __std__ module.  ... ah.  The 'sys' module seems to be one of the core
> modules in Python, and doesn't live in the same place as the rest of the
> Standard Library.  In fact, it appears to be statically compiled into
> Python itself.  So you hit on one of the few special cases.  *grin* I
> wonder if there are others...
>
> We can see that 'sys' is hardcoded by doing a 'help(sys)'; unlike the
> other standard Python modules, 'sys' doesn't have a __file__ attribute.
>
>
>
> Ok, I think I can fix __std__ to make it handle 'sys' as a special case.
> Ok, done.  Can you try it out?  If you can replace the file
> __std__/__init__.py with:
>
>
>
> ###
> import distutils.sysconfig
>
>
> """Note: it is important to do an 'import sys' here!  'sys' doesn't
> really live in distutils.sysconfig.get_python_lib()--- it's statically
> compiled into Python.  If we want:
>
>     from __std__ import sys
>
> to work, we need to have 'sys' here in our namespace.
>
> Thanks to tpc@csua.berkeley.edu for pointing this out.
> """
> import sys
>
>
>
> __path__ = [distutils.sysconfig.get_python_lib(standard_lib=1)]
>
> __all__ = []
> ###
>
>
>
> and reinstall __std__, the 'from __std__ import sys' should then work.
> If it looks good with you, I'll update the package with the fix.
>
>
>
> Thanks again!
>
>