Re: [Matplotlib-users] ImportError: No module named _winreg

[Martin M. <mmo...@gm...>]

Thomas Caswell wrote:
> winreg looks like it is for programmatic access to the windows registry which mpl uses to find fonts in windows (https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/font_manager.py#L173).
>
>
> I suspect this is a problem with pychecker being too enthusiastic about checking imports.

FYI:

+*six-1.9.0-r1 (06 May 2015)
+
+  06 May 2015; Justin Lecher <jl...@ge...> +files/six-1.9.0-winreg.patch,
+  +six-1.9.0-r1.ebuild, metadata.xml, six-9999.ebuild:
+  Backport fix for windows only modules, bug #547928
+

https://bugs.gentoo.org/show_bug.cgi?id=547928

>
>
> Tom
>
>
> On Tue, Apr 28, 2015, 08:14 Martin MOKREJŠ <mmo...@gm... <mailto:mmo...@gm...>> wrote:
>
>     Hi Thomas,
>         thank you for your thoughts. But numpy is installed:
>
>     $ python
>     Python 2.7.9 (default, Apr 10 2015, 16:21:10)
>     [GCC 4.9.2] on linux2
>     Type "help", "copyright", "credits" or "license" for more information.
>      >>> import pylab
>      >>> import numpy
>      >>>
>
>     Probably you are right that the warnings (reported only by pychecker) are coming from numpy. They appear with *either* of:
>
>     import pylab
>     import numpy
>     import matplotlib
>
>
>     But, what I really asked for was where does the _winreg come from? It happens only with any of "import pylab" or "import matplotlib".
>
>     Martin
>
>     Thomas Caswell wrote:
>      > Those look like they are coming up out of numpy.  I am not familiar with gentoo, but it looks like numpy is not in the dependencies list.
>      >
>      > Tom
>      >
>      >
>      > On Mon, Apr 27, 2015, 16:59 Martin MOKREJŠ <mmo...@gm... <mailto:mmo...@gm...> <mailto:mmo...@gm... <mailto:mmo...@gm...>>> wrote:
>      >
>      >     Hi,
>      >         I use dev-python/matplotlib-1.4.3 and I suspect this is a recent regression in it. Can anybody reproduce this?
>      >
>      >     $ pychecker test.py
>      >     Processing module test (test.py)...
>      >     warning: couldn't find real module for class <class 'fftpack.error'> (module name: fftpack)
>      >     warning: couldn't find real module for class <class 'lapack_lite.LapackError'> (module name: lapack_lite)
>      >     warning: couldn't find real module for class <type 'mtrand.RandomState'> (module name: mtrand)
>      >     warning: couldn't find real module for class <type 'mtrand.RandomState'> (module name: mtrand)
>      >         ImportError: No module named _winreg
>      >     warning: couldn't find real module for class <type 'cntr.Cntr'> (module name: cntr)
>      >
>      >     Warnings...
>      >
>      >     test.py:3: Imported module (pylab) not used
>      >     $ cat test.py
>      >     #! /usr/bin/python
>      >
>      >     import pylab
>      >     $