代码 :
#!/usr/bin/env python
# coding:utf-8
import string
with open("data.txt", "r") as f:
data = f.read()
letters = [0 for x in range(0, 26)]
frequency = "EARIOTNSLCUDPMHGBFYWKVXZJQ".lower()
print frequency
for i in data:
if i.isalpha():
i = i.lower()
index = ord(i) - ord('a')
letters[index] += 1
temp_letters = [{} for x in range(0, 26)]
counter = 0
for i in letters:
temp_letters[counter] = {chr(ord('a') + counter): i}
counter += 1
def compare(a, b):
return a.values()[0] - b.values()[0]
target = ''
for i in sorted(temp_letters, compare, None, True):
target += target.join(i.keys())
print "[+] Freque : %s" % frequency
print "[+] Target : %s" % target
table = string.maketrans(frequency, target)
print data
print string.translate(data, table)
