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letters = "abacddefabffegga" n = letters.count('a') print(n) ''' run: 4 '''
from collections import Counter letters = "abacddefabffegga" counter = Counter(letters) print(counter['a']) ''' run: 4 '''
import re letters = "abacddefabffegga" n = len(re.findall("a", letters)) print(n) ''' run: 4 '''