我想用 python 编写一个 ROT 13 编码器

Question

I wanted to write a ROT 13 Encoder in python. I have never used python before. The encoder i want should I tried writing a script but its only able to do the basic ROT 13. Here is one of the script i have been using

alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
num_chars = len(alphabet)
rot_amt = 13

string_input = input('Enter a string: ')
string_output = ''

for curr_char in string_input:
    char_loc = alphabet.index(curr_char)
    new_loc = (char_loc + rot_amt) % num_chars
    string_output += alphabet[new_loc]

print(string_output)

Answer 1

You may have heard of Zen of Python, which is printed when you import this . It actually uses the rot13 encoding. You may see its source in official cPython git here

Answer 2

You are almost there, you only forgot to change to upper case:

alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
num_chars = len(alphabet)
rot_amt = 13

string_input = input('Enter a string: ')
string_output = ''

for curr_char in string_input:
    char_loc = alphabet.index(curr_char.upper())
    new_loc = (char_loc + rot_amt) % num_chars
    string_output += alphabet[new_loc]

print(string_output)

Answer 3

Convert the input to uppercase and your script will work fine. You could do it while taking input with the upper() function:

string_input = input('Enter a string: ').upper()

Hope it helps.

Answer 4

You can also use this simple script:

import codecs
s  = input("Input your text: ")
os = codecs.encode( s, "rot13" )
print(os)