I tried to upgrade pip in virtual environment. I have error as follows.
Exception:
Traceback (most recent call last):
File "/home/itc/intel/training_extensions/venv/lib/python3.6/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/home/itc/intel/training_extensions/venv/lib/python3.6/site-packages/pip/commands/install.py", line 290, in run
with self._build_session(options) as session:
File "/home/itc/intel/training_extensions/venv/lib/python3.6/site-packages/pip/basecommand.py", line 69, in _build_session
if options.cache_dir else None
File "/usr/lib/python3.6/posixpath.py", line 80, in join
a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not int
What could be wrong?