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bpo-45600: Enhanced / clarified the docs for os.environ and os.environb (GH-29204)

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Co-authored-by: Łukasz Langa <lukasz@langa.pl>
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andrei kulakov 2021-10-29 16:18:45 -04:00 committed by GitHub
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Doc/library/os.rst
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@ -170,9 +170,10 @@ process and user.
.. data:: environ
A :term:`mapping` object representing the string environment. For example,
``environ['HOME']`` is the pathname of your home directory (on some platforms),
and is equivalent to ``getenv("HOME")`` in C.
A :term:`mapping` object where keys and values are strings that represent
the process environment. For example, ``environ['HOME']`` is the pathname
of your home directory (on some platforms), and is equivalent to
``getenv("HOME")`` in C.
This mapping is captured the first time the :mod:`os` module is imported,
typically during Python startup as part of processing :file:`site.py`. Changes
@ -209,10 +210,10 @@ process and user.
.. data:: environb
Bytes version of :data:`environ`: a :term:`mapping` object representing the
environment as byte strings. :data:`environ` and :data:`environb` are
synchronized (modify :data:`environb` updates :data:`environ`, and vice
versa).
Bytes version of :data:`environ`: a :term:`mapping` object where both keys
and values are :class:`bytes` objects representing the process environment.
:data:`environ` and :data:`environb` are synchronized (modifying
:data:`environb` updates :data:`environ`, and vice versa).
:data:`environb` is only available if :data:`supports_bytes_environ` is
``True``.