[issue42641] Deprecate os.popen() function

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

In the past, multiple os.popen() usage have been replaced with subprocess in the stdlib to prevent the risk of shell injection:

* bpo-22636: ctypes modules
* bpo-22637: uuid module

By the way, there is an open issue bpo-21557 "os.popen & os.system lack shell-related security warnings".

See also bpo-6490 "os.popen documentation is probably wrong" (fixed).

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