在 Python 3.8 中将不同行上的字符打印成字符串

Question

Here's my code, at the moment it prints the decrypted Caesar Cypher characters all on seperate lines. Is there any way to add them onto one line as a string ? Moreover is there a possible way to implement .isalpha() to account for spaces and questions marks etc in the uncrypted message.

"""Cypher program."""
import string

alphabet = string.ascii_lowercase
message = "thequickbrownfoxjumpsoverthelazydog"
key = 7
for char in message:
    new_char = key + (alphabet.index(char))
    if new_char > 25:
        new_char = new_char % 26
    print(alphabet[new_char])

I am quite new to Python, very sorry if this is a newbie question.

Many thanks to whomever is kind enough to help.

Answer 1

You can append alphabet[new_char] into a list and then use join to print it as string. Sample code below (edited to let chars that are not alpha numeric to be left in place):

import string

alphabet = string.ascii_lowercase
message = "the quick brow???nxa2 fox jumps over the lazy dog"
key = 7
lst=[]
for char in message:
    if char.isalpha() is True:
        new_char = key + (alphabet.index(char))
        if new_char > 25:
            new_char = new_char % 26
        lst.append(alphabet[new_char])
    else:
        lst.append(char)
print(''.join(i for i in lst))

Answer 2

"""Cypher program."""
import string

alphabet = string.ascii_lowercase
message = "thequick0brownfox jumpsoverthelazydog"

def transform(char,key):
    if char.isalpha():
       new_char = key + (alphabet.index(char))
       if new_char > 25:
           new_char = new_char % 26
       return alphabet[new_char]
    return char

key = 7

# faster string comprehension
decripted = [transform(char,key) for char in message]
  
print(decripted)
# or 

# "".join - puts all elements of an array toghether in a string using a separator
print("".join(decripted))