markupsafe 1.0 throws an error

Expected behaviour:

pip install flexget should install flexget.

Actual behaviour:

14:59:49 Downloading MarkupSafe-1.0.tar.gz (14 kB) 14:59:49  ERROR: Command errored out with exit status 1: 14:59:49 command: /opt/flexget/bin/python3 -c ‘import sys, setuptools, tokenize; sys.argv[0] = ‘"’"’/tmp/pip-install-ewpbt6pd/markupsafe/setup.py’“'”‘; file=’“'”‘/tmp/pip-install-ewpbt6pd/markupsafe/setup.py’“'”‘;f=getattr(tokenize, ‘"’“‘open’”’“‘, open)(file);code=f.read().replace(’”‘"’\r\n’“'”‘, ‘"’"’\n’“'”‘);f.close();exec(compile(code, file, ‘"’“‘exec’”’"‘))’ egg_info --egg-base /tmp/pip-install-ewpbt6pd/markupsafe/pip-egg-info 14:59:49 cwd: /tmp/pip-install-ewpbt6pd/markupsafe/ 14:59:49 Complete output (5 lines): 14:59:49 Traceback (most recent call last): 14:59:49 File “<string>”, line 1, in <module> 14:59:49 File “/tmp/pip-install-ewpbt6pd/markupsafe/setup.py”, line 6, in <module> 14:59:49 from setuptools import setup, Extension, Feature 14:59:49 ImportError: cannot import name ‘Feature’ 14:59:49 ----------------------------------------

(followed by install failure)

Steps to reproduce:

pip install flexget

Additional information:

A quick search shows this relevant issue : https://github.com/pallets/markupsafe/issues/57, as such it may be as simple as incrementing the version in use.

[mgilardi]

Updating MarkupSafe to v1.1.1 didn’t work for me, but downgrading Setuptools did.

pip install setuptools==45.2.0

Setuptools 45.2.0 worked well for me. It was released in January I believe, so not going back too far.

[paranoidi]

I tested with clean py3.7 venv and it failed. If users experience crash on install without upgrading setuptools something is horribly wrong.