["python","python-3.x","pip","setuptools"]
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 https://*/pypi/packages/mongoengine-0.19.1.tar.gz#md5=68e613009f6466239158821a102ac084 (from https://*/pypi/simple/mongoengine/). 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
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