strip all non alphabet characters from string pyhton code example

Example 1: python remove non letters from string

def nospecial(text):
	import re
	text = re.sub("[^a-zA-Z0-9]+", "",text)
	return text

Example 2: remove alphabetic characters python

numeric_answer = filter(str.isdigit, original_string)
numeric_answer = "".join(numeric_answer)