我有一个程序可以解码一个凯撒密码和几个多行文本文件来解码。
根据我的讲师代码检查器,文本后总是有一个空行,但是当我自己运行代码时,我什么也没看到。
删除最后一个字符只会删除文本中的最后一个字母或数字,而不是换行符。
这是我的代码:
import sys
import string
import collections
ciphertext_lines = sys.stdin.readlines()
ciphertext = ''
for i in ciphertext_lines:
ciphertext += i
alphanum = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
def getShiftVal():
string = ''
for line in ciphertext:
string = string + line
most_common_letter = ((collections.Counter(string).most_common(2)[1])[0])
shift_val = (alphanum.index(most_common_letter) - 4)
return shift_val
def decrypt(ciphertext, n):
alphabet_numbers = collections.deque(string.ascii_uppercase + string.digits)
alphanum = ''.join(list(alphabet_numbers))
alphabet_numbers.rotate(n)
alphanum_rotated = ''.join(list(alphabet_numbers))
return ciphertext.translate(str.maketrans(alphanum, alphanum_rotated))
def main():
n = getShiftVal()
decrypted = decrypt(ciphertext, n)
print(decrypted)
if __name__ == '__main__':
main()