CODEWITHSUNDEEP
pythonstringif-statementrandom
Abhishek
Abhishek

Reputation: 105

Generating random strings until a given string is generated

This is a program to generate some random string until the given string is generated. I can't get the idea of fixing the index in the else part .If the random generated character in the attemptThis[i] doesn't matches with the character in the t[i], we are storing the character in the attemptNext right? And after that when it checks again, only one character is stored in the attemptThis? I don't know whether or not i am asking the right way. I got the idea of statements in the if part. But the else:attemptNext += t[i] is confusing. An exp with example will be greatly appreciated. (code from gfg)

import string 
import random 
   
possibleCharacters = string.ascii_lowercase + string.digits + 
                     string.ascii_uppercase + ' ., !?;:'
  
t = "geek"
  
attemptThis = ''.join(random.choice(possibleCharacters) 
                                for i in range(len(t))) 
attemptNext = '' 
  
completed = False
iteration = 0
  
while completed == False: 
    print(attemptThis) 
      
    attemptNext = '' 
    completed = True
      
    for i in range(len(t)): 
        if attemptThis[i] != t[i]: 
            completed = False
            attemptNext += random.choice(possibleCharacters) 
        else: 
            attemptNext += t[i] 
              
    iteration += 1
    attemptThis = attemptNext 
  
print("Target matched after " +
      str(iteration) + " iterations")

Upvotes: 0

Views: 911

Answers (3)

Weird x Ninja
Weird x Ninja

Reputation: 1

import random
import string


possibleCharacters = string.ascii_lowercase + string.digits + 
string.ascii_uppercase + ' ., !?;:'

a='zero'
c=1
while a != random:
      b = ''.join(random.choice(possibleCharacters)for i in range(len(a)))
      c=c+1
      print(b)
      if b ==a:
         print(a)
         print("target is matched after",c," attermpts")
         break
#try this short and simple

Upvotes: 0

FireFly
FireFly

Reputation: 1

import string
import random

s1 = input("enter the string:")
n = len(a)
s2 = None
char = string.digits+string.ascii_uppercase+string.ascii_lowercase

c = 1
while s1!=s2:
    s2= ''.join(random.choice(char) for i in range(n))
    c+=1
    print(c,s2)

Upvotes: 0

Ederic Oytas
Ederic Oytas

Reputation: 139

The for loop is building up a string for attemptNext. If a character in attemptThis is equal to its corresponding character in t, then that character is added to the end of attemptNext.

The code is weirdly written. In code, it's good practice to avoid not or != in a simple expression in an if-else statement. In this case, it used !=. It's often better to use the opposite (==) and switch the bodies of each.

Upvotes: 1

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