1) Map Functions

When to use: to apply a function, ititeratively over all the iterables present in the iterator (what a fun way to begin a fun chapter)
What it will do: map() loops over the items of an input iterable (like List, Tuple, String ), applying a transformation function to every and returns an iterator. More on iterator, iterables & iteration

Map & Filter

Map & Reduce

Map & Lambda

2) Exception Handling

Regular Expressions

List of RegEx Metacharacters, Sequences, Functions and Sets