Simple Fun #176: Reverse Letter

Task

Given a string str, reverse it and omit all non-alphabetic characters.

Example

For str = "krishan", the output should be "nahsirk".

For str = "ultr53o?n", the output should be "nortlu".

Input/Output

• [input] string str

A string consists of lowercase latin letters, digits and symbols.

• [output] a string

 

Solution:

def reverse_letter(string):
    return ''.join([char for char in string[::-1] if char.isalpha()])

 

Other Solution:

def reverse_letter(string):
    return ''.join(filter(str.isalpha, reversed(string)))