Error while downloading the requirements using pip install (setup command: use_2to3 is invalid.)

version pip 21.2.4 python 3.6

The command:

pip install -r requirements.txt

The content of my requirements.txt:

mongoengine==0.19.1
numpy==1.16.2
pylint
pandas==1.1.5
fawkes

The command is failing with this error

ERROR: Command errored out with exit status 1: command: /Users/*/Desktop/ml/*/venv/bin/python -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/kn/0y92g7x55qs7c42tln4gwhtm0000gp/T/pip-install-soh30mel/mongoengine_89e68f8427244f1bb3215b22f77a619c/setup.py'"'"'; __file__='"'"'/private/var/folders/kn/0y92g7x55qs7c42tln4gwhtm0000gp/T/pip-install-soh30mel/mongoengine_89e68f8427244f1bb3215b22f77a619c/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /private/var/folders/kn/0y92g7x55qs7c42tln4gwhtm0000gp/T/pip-pip-egg-info-97994d6e cwd: /private/var/folders/kn/0y92g7x55qs7c42tln4gwhtm0000gp/T/pip-install-soh30mel/mongoengine_89e68f8427244f1bb3215b22f77a619c/ Complete output (1 lines): error in mongoengine setup command: use_2to3 is invalid. ----------------------------------------
WARNING: Discarding (from ). Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
ERROR: Could not find a version that satisfies the requirement mongoengine==0.19.1 (from versions: 0.15.0, 0.19.1)
ERROR: No matching distribution found for mongoengine==0.19.1

4 Answers

It looks like setuptools>=58 breaks support for use_2to3:

setuptools changelog for v58

So you should update setuptools to setuptools<58 or avoid using packages with use_2to3 in the setup parameters.

I was having the same problem, pip==19.3.1

I install setuptools==58It worked for me. pip install setuptools==58. The error coming from setuptools==69 that previously ran in my device. and Finally saved me setuptools version 58 for this error.

Upgrading MongoEngine to >= 0.20 would also fix the problem as Python2 support (hence use_2to3) was dropped in 0.20

"pip install setuptools==58" worked for me. The setuptools version was 59 when I upgraded ubuntu to 22.04 and its python 3.10. I started a clean virtual environment for an existings django project. It had just two packages:

`pip list Package Version

pip 22.0.2 setuptools 59.6.0`

Then I downgrade the setuptools to 58 as pip install setuptools==58.0.0. After that the pip install -r requirements.txt has not such error above.