letter_makeup.py

#!/usr/bin/env python
# coding=utf-8

from __future__ import division

import sys

alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]

def letter_makeup(file_name):
    file_contents = ""
    with file(file_name) as f: file_contents = f.read().lower()
    occurences = []
    for i in alphabet:
        occurences.append(file_contents.count(i))
    total = sum(occurences)
    occurences_p = []
    for i in occurences:
        occurences_p.append((i / total) * 100.0)
    str_out = """
    a %d%%
    b %d%%
    c %d%%
    d %d%%
    e %d%%
    f %d%%
    g %d%%
    h %d%%
    i %d%%
    j %d%%
    k %d%%
    l %d%%
    m %d%%
    n %d%%
    o %d%%
    p %d%%
    q %d%%
    r %d%%
    s %d%%
    t %d%%
    u %d%%
    v %d%%
    w %d%%
    x %d%%
    y %d%%
    z %d%%
    """ % tuple(occurences_p)
    return str_out
if len(sys.argv) < 2:
    print("At least one argument expected.")
else:
    for i in sys.argv[1:]:
        print("%s:\n" % (i))
        print(letter_makeup(i))