New submission from STINNER Victor <[email protected]>:
Currently, when the random module is imported, the hashlib module is always
imported which loads the OpenSSL library, whereas hashlib is only needed when a
Random() instance is created with a string seed.
For example, "rnd = random.Random()" and "rnd = random.Random(12345)" don't
need hashlib.
Example on Linux:
$ python3
Python 3.7.2 (default, Mar 21 2019, 10:09:12)
>>> import os, sys
>>> 'hashlib' in sys.modules
False
>>> res=os.system(f"grep ssl /proc/{os.getpid()}/maps")
>>> import random
>>> 'hashlib' in sys.modules
True
>>> res=os.system(f"grep ssl /proc/{os.getpid()}/maps")
7f463ec38000-7f463ec55000 r--p 00000000 00:2a 5791335
/usr/lib64/libssl.so.1.1.1b
7f463ec55000-7f463eca5000 r-xp 0001d000 00:2a 5791335
/usr/lib64/libssl.so.1.1.1b
...
Attached PR only imports hashlib on demand.
Note: I noticed this issue while working on adding OpenSSL 1.1.1 support to
Python 3.4 :-)
----------
components: Library (Lib)
messages: 339637
nosy: vstinner
priority: normal
severity: normal
status: open
title: "import random" should import hashlib on demand (nor load OpenSSL)
versions: Python 3.8
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue36559>
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