The simplest form of regression in Python is, well, simple linear regression. With simple linear regression, you're trying to ...

Some other languages would require you to specifically state what type of variable you wanted to use (String MyVariable = “Hello!”), but in Python, the interpreter figures that out from context.

For some time now, Python developers have been able to “annotate” names with type information. With Python 3.5, type hints officially became part of the language (see PEP 484).