how to check for a charachter in string python code example

Example 1: check if anything in a list is in a string python

y = any(x in String for x in List)

Example 2: check for double character in a string python

count = {}
for s in check_string:
  if s in count:
    count[s] += 1
  else:
    count[s] = 1

for key in count:
  if count[key] > 1:
    print key, count[key]