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gh-135788: Support NETRC environment variable in netrc and update documentation #135802

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gh-135788: Support NETRC environment variable in netrc and update documentation #135802

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4c3c39a
iadd support for the envvar and implement tests
Jun 21, 2025
50ca1d0
refactor tests and double check logic for security
Jun 21, 2025
f17476b
add documentation
Jun 21, 2025
c1e3abf
fix linting issues
Jun 21, 2025
d877728
fix doc linting
Jun 21, 2025
b46c00a
Add docstrings and fix documentation
Jun 22, 2025
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7 changes: 4 additions & 3 deletions Doc/library/netrc.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,10 @@ the Unix :program:`ftp` program and other FTP clients.
.. class:: netrc([file])

A :class:`~netrc.netrc` instance or subclass instance encapsulates data from a netrc
file. The initialization argument, if present, specifies the file to parse. If
no argument is given, the file :file:`.netrc` in the user's home directory --
as determined by :func:`os.path.expanduser` -- will be read. Otherwise,
file. The initialization argument, if present, specifies the file to parse. If no
argument is given, it will look for the file path in the :envvar:`!NETRC` environment variable.
If that is not set, it defaults to reading the file :file:`.netrc` in the user's home
directory -- as determined by :func:`os.path.expanduser`. If the file cannot be found,
a :exc:`FileNotFoundError` exception will be raised.
Parse errors will raise :exc:`NetrcParseError` with diagnostic
information including the file name, line number, and terminating token.
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5 changes: 3 additions & 2 deletions Lib/netrc.py
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Expand Up @@ -65,9 +65,10 @@ def push_token(self, token):

class netrc:
def __init__(self, file=None):
default_netrc = file is None
netrc_envvar = os.environ.get("NETRC", "")
default_netrc = file is None and not bool(netrc_envvar)
if file is None:
file = os.path.join(os.path.expanduser("~"), ".netrc")
file = netrc_envvar or os.path.join(os.path.expanduser("~"), ".netrc")
self.hosts = {}
self.macros = {}
try:
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