python concatenate strings with separator code example

Example 1: python join list to string

list = ['Add', 'Grepper', 'Answer']
Inline
> joined = " ".join(list)
> Add Grepper Answer
Variable
> seperator = ", "
> joined = seperator.join(list)
> Add, Grepper, Answer

Example 2: python join string with common string

def merge(s1, s2):
    i = 0
    while not s2.startswith(s1[i:]):
        i += 1
    return s1[:i] + s2