Whenever I create a venv, I get a message asking me to upgrade pip:
You are using pip version 9.0.1, however version 18.0 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
I can upgrade the Pip in that venv fine, after which it is up to date:
C:\Users\mkupfer\Python-Sandbox\sibc-python-scripts>pip --version
pip 18.0 from c:\users\mkupfer\appdata\local\programs\python\python36-32\lib\sit
e-packages\pip (python 3.6)
C:\Users\mkupfer\Python-Sandbox\sibc-python-scripts>pip3 --version
pip 18.0 from c:\users\mkupfer\appdata\local\programs\python\python36-32\lib\sit
e-packages\pip (python 3.6)
C:\Users\mkupfer\Python-Sandbox\sibc-python-scripts>pip3 install --upgrade pip
Requirement already up-to-date: pip in c:\users\mkupfer\appdata\local\programs\p
ython\python36-32\lib\site-packages (18.0)
but if I create another venv, it will have the same issue. How can I make the upgrade permanent? I tried the advice at virtualenv use upgraded system default pip, but it does not solve the problem.
The issue seems to be that new virtual environments are using an old version of pip. Note that pip is installed from a source tarfile (or wheel) included with virtualenv, in the site-packages/virtualenv_support directory.
$ ls -l /path/to/site-packages/virtualenv_support
pip-9.1-py2.py3-none-any.whl
A quick way to workaround the problem is to make sure you upgrade pip whenever you create a new virtualenv, like so:
$ virtualenv venv
$ venv/bin/pip install -U pip
Alternatively, make sure you have the latest version of virtualenv. According to their release notes, virtualenv==16 is using pip==10.
$ pip install -U virtualenv
Finally, since virtualenv looks for pip*.whl in virtualenv_support, this will also work:
$ mv /path/to/site-packages/virtualenv_support/pip*.whl{,bak}
$ pip wheel -w /path/to/site-packages/virtualenv_support/ 'pip==18'
All new virtualenvs will use the version of pip that you installed into virtualenv_support. However, this feels hacky.
(Attempted with virtualenv==16. This results in all new virtualenvs with pip==18.)