Replacing random characters in string

I have a random string word for example

word = graphic

I want to take this word and and turn any random letters into underscore and put space in between

for the output to look something like this

g _ a _ h _ c

The underscore should be random for a different word each time. How can I do this efficiently

Here's a way to do this using Python's built-in random module. The idea here is to randomly select indices of the letters in the word to be replaced by an underscore.

import random

def random_underscores(word, p=0.5):
    """
    Function to replace letters in a word with underscores at random places.
    
    Parameters:
    word: str, the word to replace letters in.
    p: float, probability of each character being replaced. Default is 0.5.
    """

    
    return ' '.join('_' if random.random() < p else char for char in word)

word = "graphic"
print(random_underscores(word))

This script defines a function random_underscores() that takes in a word and a probability p (default is 0.5, so on average half of the characters will be replaced).

The function uses a list comprehension to iterate over each character in the word. For each character, it generates a random number between 0 and 1, and if that number is less than p, it replaces the character with an underscore.

You can adjust the value of p to control the average number of letters that get replaced. A value of 1.0 will replace all letters, and a value of 0.0 will replace none.

Remember that because the replacement is random, you'll get different results each time you run the function with the same inputs.

If you want to ensure that at least one character is always visible, you can modify the function slightly to check if all characters have been replaced. If so, it can randomly select one character to remain visible:

import random

def random_underscores(word, p=0.5):
    """
    Function to replace letters in a word with underscores at random places, ensuring at least one character remains.
    
    Parameters:
    word: str, the word to replace letters in.
    p: float, probability of each character being replaced. Default is 0.5.
    """
    replaced = ['_' if random.random() < p else char for char in word]

    # Check if all characters have been replaced. If so, randomly select one to remain
    if all(char == '_' for char in replaced):
        replaced[random.randint(0, len(word)-1)] = word[random.randint(0, len(word)-1)]
        
    return ' '.join(replaced)

word = "graphic"
print(random_underscores(word))

I hope this will helps you

from random import choice
word = "helloWorld"
word = "".join(["_" if choice([True, False]) else char for char in word])
print(word)

You can try this:

from random import randint
def RandUnder(word):
  nofUnderscores = randint(1, len(word))
  for i in range(nofUnderscores):
    randPos = randint(0, len(word)-1)
    word[randPos] = "_"
  return word
word = "example"
print(" ".join(RandUnder(list(word))))