Mandeep Singh Grang added the comment:
Here is a testcase to reproduce the issue:
> cat test.py
import site, sys
site.addsitedir('/foo/bar')
print (sys.path)
This prints just a single instance of '/foo/bar':
['/local/mnt/workspace/python/tst', '/foo/bar', '/usr/local/lib/python36.zip',
'/local/mnt/workspace/python/src/Lib',
'/local/mnt/workspace/python/src/Lib/plat-linux',
'/local/mnt/workspace/python/build/build/lib.linux-x86_64-3.6-pydebug']
Now if we explicitly set PYTHONPATH to include '/foo/bar'
> export PYTHONPATH=/foo/bar
and then run test.py here is the output:
['/local/mnt/workspace/python/tst', '/foo/bar', '/usr/local/lib/python36.zip',
'/local/mnt/workspace/python/src/Lib',
'/local/mnt/workspace/python/src/Lib/plat-linux',
'/local/mnt/workspace/python/build/build/lib.linux-x86_64-3.6-pydebug',
'/foo/bar']
We see that there are duplicate entries for '/foo/bar'.
As Wolfgang rightly said the issue comes from the check for
"if os.path.isdir(dir)" inside _init_pathinfo() in site.py.
On removing this check I no longer see the duplicate entry for '/foo/bar'.
But since this is the first bug I am looking at I am not sure of the
implications of removing this check. Can someone please confirm that what I see
is indeed a failing test case, or is this the intended behavior?
Thanks,
Mandeep
------
nosy: +Mandeep Singh Grang
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