Spread Function in Python

Implements javascript's [].concat(...arr). Flattens the list(non-deep) and returns a list.

def spread(arg):
    ret = []
    for i in arg:
        if isinstance(i, list):
            ret.extend(i)
        else:
            ret.append(i)
    return ret

Here are the input and Output...

spread([1,2,3,[4,5,6],[7],8,9]) # [1,2,3,4,5,6,7,8,9]

This is a Series we will be doing here after exploring small hacks and tips in python...