Issue 29821: importing module shutil executes file 'copy.py' (original) (raw)
Created on 2017-03-15 16:35 by Oliver Etchebarne (drmad), last changed 2022-04-11 14:58 by admin. This issue is now closed.
Messages (5)
Author: Oliver Etchebarne (drmad) (Oliver Etchebarne (drmad))
Date: 2017-03-15 16:35
I didn't research this issue further. Create a file 'test.py', and write only 'import shutil'. Then create a file 'copy.py' in the same directory, and write something inside, like 'print ("OH NO")'.
When you run test.py, 'copy.py' is executed, and prints the string. Tested with python 3.5 and 3.6. Works as expected (test.py doing nothing) in python 2.7
Author: Ammar Askar (ammar2) * 
Date: 2017-03-15 20:50
I was only able to recreate this under 3.4 and 3.3, and both of them are under "security" status on https://docs.python.org/devguide/#status-of-python-branches
Should this be marked as won't fix?
Author: Ammar Askar (ammar2) *
Date: 2017-03-15 21:06
As per discussion with haypo on irc, this is not a bug since essentially you've made a file which shadows the following stdlib module https://docs.python.org/3/library/copy.html
When shutil goes to import the copy module, your copy module is given higher priority in the import machinery which is why your code gets executed. You can read up more about this here: http://python-notes.curiousefficiency.org/en/latest/python_concepts/import_traps.html#the-name-shadowing-trap
Author: STINNER Victor (vstinner) *
Date: 2017-03-15 21:08
Run "python3 -I script.py" to not insert '' (current directory) at the first position of sys.path. https://docs.python.org/dev/using/cmdline.html#cmdoption-I
Author: Eryk Sun (eryksun) * 
Date: 2017-03-15 23:41
Run "python3 -I script.py" to not insert '' (current directory) at the first position of sys.path.
That should be "script directory", not "current directory". We only add the current directory to sys.path in interactive mode, and for -c and -m. Adding the current directory to sys.path when running a script would be silly and cause endless grief.
History
Date
User
Action
Args
2022-04-11 14:58:44
admin
set
github: 74007
2017-03-15 23:41:18
eryksun
set
nosy: + eryksun
messages: +
2017-03-15 21:08:42
vstinner
set
nosy: + vstinner
messages: +
2017-03-15 21:06:17
ammar2
set
status: open -> closed
resolution: not a bug
messages: +
stage: resolved
2017-03-15 20:50:48
ammar2
set
nosy: + ammar2
messages: +
versions: + Python 3.3, Python 3.4, - Python 3.5
2017-03-15 16:35:14
Oliver Etchebarne (drmad)
create