python - Occurence of characters in common in two strings

Question

I want to use a for loop to calculate the number of times a character in one string occurs in another string.

e.g. if string1 = 'python' and string2 = 'boa constrictor' then it should calculate to 6 (2 t's, 3 o's, 1 n)

Does anyone know how to do this?

Answer 1

Pretty straightforward:

count = 0

for letter in set(string1):
  count += string2.count(letter)

print(count)