python pip3 has attribute error when installing flask for python 3.4.3

Question

Im using 3.4.3 for a school project but it seems pip doesnt like this. I am working in a VM. I get this error when I pip3 install flask.

Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_vagrant/MarkupSafe

with this also:

 class DistutilsLoader(importlib.util.abc.Loader):
 AttributeError: 'module' object has no attribute 'abc'

I checked and originally I had no dist-packages directory in /usr/lib/python3.4 but i had an existing dist-packages in /usr/lib/python3/, so I made a symlink from /usr/lib/python3.4 to the existing dist-packages. Not quite sure what else to do, short of reinstalling Python or worse the VM... I am digging into the pip.log but it seems verymuch the same as what I have already seen.

See today's issue: github.com/pypa/setuptools/issues/2362. Perhaps you just upgraded setuptools? Try to downgrade it. Try pip install --upgrade "setuptools<44" — phd
– phd, Commented Aug 31, 2020 at 22:03
thank, this with the other answer was able to get flask installed on my system. @phd — derric-d
– derric-d, Commented Aug 31, 2020 at 22:16

Chris · Accepted Answer · 2020-08-31 22:05:18Z

4

Python 3.4.3 is pretty ancient and no longer supported. In fact, no version of Python 3.4 is still supported. I strongly recommend upgrading to a modern version of Python, ideally 3.8.

The current version of Flask requires Python 2.7 or Python 3.5+.

If you absolutely must stay on Python 3.4, try installing version 1.0.4, which appears to be the newest version that supports Python 3.4:

pip3 install flask==1.0.4

answered Aug 31, 2020 at 22:05

Chris

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2 Comments

derric-d Over a year ago

Yeah Im stuck with 3,4,3 for a school project :( Thanks for this answer, with the setuptools downgrade hint and this I was able to get the correct flask installed with python3. You rock!

Chris Over a year ago

@derric-d, glad to help. But phd's comment might have been sufficient. Normally, I think pip finds the right version by itself, honouring Python version constraints.

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