Using the latest pip is the will of the PyPA, and they let you know this on every invocation that touches the network: You are using pip version 8.1.1, how

Using the latest pip is the will of the PyPA, and they let you know this on every invocation that touches the network: You are using pip version 8.1.1, however version 21.0.1 is available. You should consider upgrading via the 'pip install --upgrade pip' command. There are also packages and workflows which break on the older pips, and this has been justified on the basis that everyone can always just use the latest.