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AttributeError: module 'enum' has no attribute 'IntFlag'

asked 2020-03-20 11:12:50 -0500

Mr.Gao gravatar image

updated 2022-01-22 16:10:25 -0500

Evgeny gravatar image

for python3 user, the tutorial suggest to run:

$ catkin_make -DPYTHON_EXECUTABLE=/usr/bin/python3

to build the workspace.

however, following error may come:

AttributeError: module 'enum' has no attribute 'IntFlag'

found one answer from github, it says this error is caused by enum34, which is not support in newer version python3. if you uninstall this module, the error will be solved. but to uninstall enum34, you need to uninstall the melodic ROS also.

can anyone contact the maintainer to help to solve this weird issue???

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2 Answers

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answered 2020-06-18 19:47:35 -0500

lucasw gravatar image

updated 2020-06-18 19:47:47 -0500

In my case (inside a 20.04 docker with noetic) enum34 was installed via pip, and no other packages were depending on it, so this worked:

pip3 uninstall -y enum34
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answered 2020-04-08 18:25:44 -0500

attackordie gravatar image

Might be that your $PYTHONPATH is set to python2.x

Check the python version with


Then try unsetting with


Now try

$ catkin_make -DPYTHON_EXECUTABLE=/usr/bin/python3

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Asked: 2020-03-20 11:12:50 -0500

Seen: 16,024 times

Last updated: Jun 18 '20