Flask Framework Cookbook - Second Edition

How it works...

So far, we have used pip3 install flask multiple times. As the name suggests, the command refers to the installation of Flask, just like any Python package. If we look a bit deeper into the process of installing Flask via pip3, we will see that a number of packages are installed. The following is an outline of the package installation process of Flask:

    $ pip3 install -U flask
    Downloading/unpacking flask
    ...........
    ...........
    Many more lines.........
    ...........
    Successfully installed flask Werkzeug Jinja2 itsdangerous    markupsafe click
    Cleaning up...
  

In the preceding command, -U refers to an installation with upgrades. This will overwrite any existing installation with the latest released versions.

If we look carefully ...