Version 6.0 of more-itertools bug.
Version 6.0 of more-itertools bug.

The version 6.0 of more-itertools seems to have introduced the bug:

def _collate(*iterables, key=lambda a: a, reverse=False):
		       ^ SyntaxError: invalid syntax

`from tox import cmdline`, have the dependency of more-itertools.

Issue:

https://github.com/pytest-dev/pytest/issues/4770
https://github.com/pytest-dev/pytest/issues/4772

The other solution is to use a never version of pip.

pip install --upgrade pip

neo4j/neo4j-python-driver,neo4j/neo4j-python-driver