A Python method that will write multiple line of text contents into a text file mylife.txt. See the demo at: ...

Python-MLS (multi-line shell) is an Emacs minor mode for working directly with multi-line Python commands in the REPL. It builds on and automatically extends python-mode's inferior shell capabilities.

But [Jim’s] Python serial terminal (available in this git repository) allows you to specify multiple devices as command line arguments. You can even use wildcards to monitor every USB connection.