Up-to-date pip with AppEngine Python flex env?

Question

I want to move an app from the Python 3.7 standard environment to the Python 3.6 flex environment.

Python 3.7 comes with pip 18, Python 3.6 comes with pip 9. Pip 10

Answer 1

Only python packages installable with pip (the one supplied) can be installed using the requirements.txt method.

To satisfy any other dependencies, including pip itself, you can build a custom runtime tailored exactly to your needs:

Use a custom runtime in the App Engine flexible environment to use an alternative implementation of Java, Python, Node.js, or Go, or write code in any other language. Defining new runtime environments allow you to include additional components like language interpreters or application servers.