PermissionError: [Errno 1] Operation not permitted: '/Users/<local_path>/venv/pyvenv.cfg'

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I am running a Django application with a few cron tasks. Whenever I run python manage.py crontab add to register the cron tasks, I get a "mail" in the Terminal showing the following traceback:

Traceback (most recent call last):
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/site.py", line 609, in <module>
    main()
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/site.py", line 592, in main
    known_paths = venv(known_paths)
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/site.py", line 510, in venv
    with open(virtual_conf, encoding='utf-8') as f:
PermissionError: [Errno 1] Operation not permitted: '/Users/<local_path>/venv/pyvenv.cfg'

I am running on macOS Catalina, python 3.7.3 in a virtual environment venv.

I have tried giving full disk permission to bash, crontab, terminal, xcode and pycharm.

I have also tried installing python versions 3.7.8 and 3.8.3

Partially solved

I disabled System Integrity Protection using csrutil disable in Recovery Mode and the cron ran successfully. However, I do not see it as full solution.

Final solution

I dockerized the app and ran it as a docker container.

macos cron django python
2 Answers

I was facing the same problem and after a few searching i found a error with cron permissions.

This is how i solved:

  • Go to System Preferences -> Security & Privacy - Privacy -> Full Disk Access

  • Click on the + icon to add an item

    If the lock appears locked, click on him to unlock with your user password

  • Press Command + Shift + G to open a dialog

  • Type /usr/sbin/cron and press Enter

  • Search and select the cron file and click Open

Okay, now it should work.

user_129001760

The reason for the PermissionError is that the Python virtual environment is placed in the user directory. If you put the virtual environment in a system directory, such as /opt, there will be no problem. See example below:

$ sudo mkdir /opt/myvenv
$ cd /opt/myvenv
$ sudo python3 -m venv .venv

$ mkdir ~/workspaces/myapp
$ cd ~/workspaces/myapp
$ cat <<EOF> demo.py
> with open('/Users/username/workspaces/myapp/demo.txt', 'a+') as f:
>     f.write('Hello, cron.\n')
> EOF

$ crontab -e

$ crontab -l
* * * * * /opt/myvenv/.venv/bin/python /Users/username/workspaces/myapp/demo.py  >> /Users/username/workspaces/myapp/demo.log 2>&1

$ ls -al
total 24
drwxr-xr-x    5 liqiang  staff   160B  6 20 09:24 .
drwxr-xr-x  136 liqiang  staff   4.3K  6 20 09:18 ..
-rw-r--r--    1 liqiang  staff     0B  6 20 09:23 demo.log
-rw-r--r--    1 liqiang  staff   117B  6 20 09:23 demo.py
-rw-r--r--    1 liqiang  staff    11B  6 20 09:24 demo.txt
user_80228100
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