Use map() function with string

Question

Is there a way to use map() function with a string instead of a list? Or the map() function is meant only to work with lists?

For instance, ignoring the content of the lambda function, this code returns a map object and not a string:

def rot_13(string):
    alph = 'abcdefghijklmnopqrstuwxyz'
    return str(map(lambda i: alph[(alph.find(i)+13) % len(alph)], string))

Answer 1

Using list/generator comprehensions is preferable (more Pythonic) to map():

def rot_13(string):
    alph = 'abcdefghijklmnopqrstuwxyz'
    return ''.join(alph[(alph.find(i)+13) % len(alph)] for i in string)