Caesar Cyper Python-CodePudding

def caesar_encript(txt, shift):

chiper = ""
for i in range(len(txt)):
  char = txt[i]
  
  if char == " " :
      chiper  = ' '
  elif (char.isupper()):
     chiper  = chr((ord(char)   shift - 65) % 26   65)
  elif (char.islower()):
     chiper  = chr((ord(char)   shift - 97) % 26   97)

        
return chiper

def caesar_decript(chiper, shift):
    return caesar_encript(chiper, -shift)
 

msg = 'Random Mesage, WOOOWW!'
cpr = caesar_encript(msg,4) 
txt = caesar_decript(cpr,4)

print('plain text : ', txt)
print('chiper text : ', cpr)

I made a code for encryption but the output does not display special characters and I want special characters to be displayed without encryption

CodePudding user response：

A crude solution would be to replace this

if char == " " :
    chiper  = ' '

with this

if not char.isalpha():
    chiper  = char

CodePudding user response：

The special characters are not considered because they're also being encrypted. This approach places an if condition before that where isalnum() decides only alpha numeric characters to become encrypted.

def caesar_encript(txt, shift):
    chiper = ""
    for i in range(len(txt)):
        char = txt[i]
        
        if not char.isalnum():
            chiper =char
        else:
            if (char.isupper()):
                chiper  = chr((ord(char)   shift - 65) % 26   65)
            elif (char.islower()):
                chiper  = chr((ord(char)   shift - 97) % 26   97)

Output

plain text :  Random Mesage, WOOOWW!
chiper text :  Verhsq Qiweki, ASSSAA!