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doc: Update references to PYTHONPATH and some examples. 

The PYTHONPATH variable is replaced by GUIX_PYTHONPATH.  Refresh the packages
used or shown in some of the examples.
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Maxim Cournoyer 2021-01-25 14:58:01 -05:00
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@ -48,7 +48,7 @@ Copyright @copyright{} 2017 humanitiesNerd@*
Copyright @copyright{} 2017 Christopher Allan Webber@*
Copyright @copyright{} 2017, 2018, 2019, 2020 Marius Bakke@*
Copyright @copyright{} 2017, 2019, 2020 Hartmut Goebel@*
Copyright @copyright{} 2017, 2019, 2020 Maxim Cournoyer@*
Copyright @copyright{} 2017, 2019, 2020, 2021 Maxim Cournoyer@*
Copyright @copyright{} 2017, 2018, 2019, 2020 Tobias Geerinckx-Rice@*
Copyright @copyright{} 2017 George Clemmer@*
Copyright @copyright{} 2017 Andy Wingo@*
@ -2734,8 +2734,8 @@ you should add them to @file{~/.bash_profile} (or equivalent file if you
do not use Bash) so that environment variables are set next time you
spawn a shell. You only need to do this once and other search paths
environment variables will be taken care of similarly---e.g., if you
eventually install @code{python} and Python libraries, @code{PYTHONPATH}
will be defined.
eventually install @code{python} and Python libraries,
@env{GUIX_PYTHONPATH} will be defined.
You can go on installing packages at your will. To list installed
packages, run:
@ -3471,24 +3471,26 @@ Show details about @var{package}, taken from the list of available packages, in
recutils manual}).
@example
$ guix package --show=python | recsel -p name,version
name: python
version: 2.7.6
$ guix package --show=guile | recsel -p name,version
name: guile
version: 3.0.5
name: python
version: 3.3.5
name: guile
version: 3.0.2
name: guile
version: 2.2.7
@dots{}
@end example
You may also specify the full name of a package to only get details about a
specific version of it (this time using the @command{guix show} alias):
@example
$ guix show python@@3.4 | recsel -p name,version
name: python
version: 3.4.3
$ guix show guile@@3.0.5 | recsel -p name,version
name: guile
version: 3.0.5
@end example
@item --list-installed[=@var{regexp}]
@itemx -I [@var{regexp}]
List the currently installed packages in the specified profile, with the
@ -5493,11 +5495,11 @@ guix environment guile -- make -j4
In other situations, it is more convenient to specify the list of
packages needed in the environment. For example, the following command
runs @command{python} from an environment containing Python@tie{}2.7 and
runs @command{python} from an environment containing Python@tie{}3 and
NumPy:
@example
guix environment --ad-hoc python2-numpy python-2.7 -- python
guix environment --ad-hoc python-numpy python -- python3
@end example
Furthermore, one might want the dependencies of a package and also some
@ -7739,8 +7741,9 @@ packages, which consists in running @code{python setup.py build} and
then @code{python setup.py install --prefix=/gnu/store/@dots{}}.
For packages that install stand-alone Python programs under @code{bin/},
it takes care of wrapping these programs so that their @env{PYTHONPATH}
environment variable points to all the Python libraries they depend on.
it takes care of wrapping these programs so that their
@env{GUIX_PYTHONPATH} environment variable points to all the Python
libraries they depend on.
Which Python package is used to perform the build can be specified with
the @code{#:python} parameter. This is a useful way to force a package