Python programming challenges-using Python to implement Engma--chapter 1

Think of a fun thing to do, using Python to implement the German device that was encrypted during World War II-Engma.

So what is Engma, and how does he work? This article provides a very detailed description:

https://www.zhihu.com/question/28397034

Please look at the high-ticket answer.

Road step by step, rice stutter, below, we also come step by step to achieve Engma:

Chapter 1

Use Python to implement simple letter substitution:

When I enter a string of strings (the string is not punctuation, only letters and spaces), the program will follow the pre-set letter substitution table, simply replace the password.

Such as:

Abcdefghjiklmnopqrstuvwxyz

Qwertyuiopasdfghjklzxcvbnm

So when I enter Hello World, it should automatically replace me with ITSSG Vgkar

Try it!

The code is as follows: Using the Maketrans method of string, do you have any idea?

#-*-Coding:utf-8-*-# The purpose of this code is to implement the German World War II cipher machine via Python: Engma # First, the first step is to define a simple function: simple character substitution import Reimport stringdef simple_ Replace (password, replace_word):    If not type (password) = = Type (replace_word) = = Type (' a '):        print (' Password must be a string! ')        return False an    = Re.match (' [a-z\s]+$ ', password)    if not a:        print (' string can only contain lowercase letters and spaces!) ')        return False    If Len (replace_word)! =:        print (' The replacement code must be 26 letters!) ')        return False    ori_table = ' abcdefghijklmnopqrstuvwxyz '    table = Str.maketrans (ori_table, Replace_word )    return str.translate (password, table) A_password = input (' Please enter clear text: ') R_password = ' qwertyuiopasdfghjklzxcvbnm ' Print (' Ciphertext as follows: ', Simple_replace (A_password, R_password))

Python programming challenges-using Python to implement Engma--chapter 1