Count letters in a text file

Question

I am a beginner python programmer and I am trying to make a program which counts the numbers of letters in a text file. Here is what I\'ve got so far:

import         


        

Answer 1

You could split the problem into two simpler tasks:

#!/usr/bin/env python
import fileinput # accept input from stdin and/or files specified at command-line
from collections import Counter
from itertools import chain
from string import ascii_lowercase

# 1. count frequencies of all characters (bytes on Python 2)
freq = Counter(chain.from_iterable(fileinput.input())) # read one line at a time

# 2. print frequencies of ascii letters
for c in ascii_lowercase:
     n = freq[c] + freq[c.upper()] # merge lower- and upper-case occurrences
     if n != 0:
        print(c, n)