If you haven’t upgraded your pip/pip3 yet, you might be having a difficulty in installing packages or modules for python3+ like below:
Exception: Traceback (most recent call last): File "/usr/lib/python3.4/site-packages/pip/basecommand.py", line 232, in main status = self.run(options, args) File "/usr/lib/python3.4/site-packages/pip/commands/install.py", line 339, in run requirement_set.prepare_files(finder) File "/usr/lib/python3.4/site-packages/pip/req/req_set.py", line 229, in prepare_files req_to_install.check_if_exists() File "/usr/lib/python3.4/site-packages/pip/req/req_install.py", line 931, in check_if_exists self.satisfied_by = pkg_resources.get_distribution(self.req) File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 461, in get_distribution dist = get_provider(dist) File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 341, in get_provider return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0] File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 870, in require needed = self.resolve(parse_requirements(requirements)) File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 740, in resolve env = Environment(self.entries) File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 927, in __init__ self.scan(search_path) File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 957, in scan self.add(dist) File "/usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py", line 977, in add dists.sort(key=operator.attrgetter('hashcmp'), reverse=True) TypeError: unorderable types: NoneType() < str()
To fix this, in my case for python3.4 (Distro: Manjaro), edit __init__.py of pip package:
# edit this file /usr/lib/python3.4/site-packages/pip/_vendor/pkg_resources/__init__.py # # look for lines _remove_md5_fragment(self.location), self.py_version, self.platform, # # and change these lines to _remove_md5_fragment(self.location), self.py_version or '', self.platform or '',
You may take a look at this commit: c995677d5321.
The above solution is manual. You may also upgrade pip itself.
sudo pip install --upgrade pip