pytest 5.0 has dropped support for python2.7 / python3.4 #5519
Description
(to hopefully spearhead these issues from being created, I'm creating an intentionally invalid issue with the common failure modes)
please see Python 2.7 and 3.4 Support Plan
ways to avoid this
if pip is installing pytest>=5 on these versions, it likely means your pip is outdated. please upgrade to pip>=9 which understands the python_requires directive.
current stacktraces
These are the (current) stacktraces that'll be seen when running in the following versions:
python2.7
$ pytest --help
Traceback (most recent call last):
File "/home/asottile/workspace/pytest/venv2/bin/pytest", line 11, in <module>
load_entry_point('pytest==4.6.1.dev198+ge6ffa78e5', 'console_scripts', 'pytest')()
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2843, in load_entry_point
return ep.load()
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2434, in load
return self.resolve()
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2440, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/pytest.py", line 6, in <module>
from _pytest.assertion import register_assert_rewrite
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/_pytest/assertion/__init__.py", line 6, in <module>
from _pytest.assertion import rewrite
File "/home/asottile/workspace/pytest/venv2/local/lib/python2.7/site-packages/_pytest/assertion/rewrite.py", line 462
def _get_assertion_exprs(src: bytes): # -> Dict[int, str]
^
SyntaxError: invalid syntaxpython3.4
$ pytest --help
Traceback (most recent call last):
File "/home/asottile/workspace/pytest/venv34/bin/pytest", line 11, in <module>
load_entry_point('pytest==4.6.1.dev198+ge6ffa78e5', 'console_scripts', 'pytest')()
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/pkg_resources/__init__.py", line 2843, in load_entry_point
return ep.load()
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/pkg_resources/__init__.py", line 2434, in load
return self.resolve()
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/pkg_resources/__init__.py", line 2440, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/pytest.py", line 6, in <module>
from _pytest.assertion import register_assert_rewrite
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/_pytest/assertion/__init__.py", line 6, in <module>
from _pytest.assertion import rewrite
File "/home/asottile/workspace/pytest/venv34/lib/python3.4/site-packages/_pytest/assertion/rewrite.py", line 443, in <module>
ast.MatMult: "@",
AttributeError: 'module' object has no attribute 'MatMult'