NameError: name 'hasattr' is not defined - Python3.6, Django1.11, Ubuntu16-17, Apache2.4, mod_wsgi

Question

I\'ve set up my Python/Django virtual environment, and mod_wsgi in daemon mode, and am pretty sure (done this before) it\'s \"mostly correct\" except I get the fol

Answer 1

This is likely due to code still running in background threads when the Python interpreter is being destroyed on process shutdown. What happens during interpreter destruction is that all modules get wiped out and attribute access of things often returns None as fallback. In this case looks like builtins module was wiped before the PIL object got destroyed and so it couldn't find hasattr.

Can you confirm this only happens when Apache is being restarted and processes shutdown?

Answer 2

I encountered the same problem as well.

[Wed Sep 12 16:30:19 2018] [notice] Apache/2.2.15 (Unix) DAV/2 mod_wsgi/4.6.4     
Python/3.6 configured -- resuming normal operations
Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/mnt/workshop/py36env/lib/python3.6/site-packages/PIL/Image.py", line 600, in __del__
NameError: name 'hasattr' is not defined
Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/mnt/workshop/py36env/lib/python3.6/site-packages/PIL/Image.py", line 600, in __del__
NameError: name 'hasattr' is not defined
Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/mnt/workshop/py36env/lib/python3.6/site-packages/PIL/Image.py", line 600, in __del__
NameError: name 'hasattr' is not defined
Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/mnt/workshop/py36env/lib/python3.6/site-packages/PIL/Image.py", line 600, in __del__
NameError: name 'hasattr' is not defined
Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/mnt/workshop/py36env/lib/python3.6/site-packages/PIL/Image.py", line 600, in __del__
NameError: name 'hasattr' is not defined
[Wed Sep 12 16:33:57 2018] [notice] caught SIGTERM, shutting down
[Wed Sep 12 16:33:58 2018] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)

It maybe happened when you made a new dir but never authorized.

And I fixed it by the following:

chmod -R 755 /mnt/workshop/your_project_path
chown -R apache:apache /mnt/workshop/your_project_path

Answer 3

Try uninstalling PIL completely, and then reinstall Pillow package.

Actually there is conflict in PIL old package and Pillow package which is in conflict with newer versions of django.

You need to install the new Pillow package.

First Uninstall both

sudo pip3 uninstall pil
sudo pip3 uninstall pillow

Reinstall Pillow

sudo pip3 install pillow