Program to Replace a Word with Asterisks in a Sentence

Replace word in file python – Python Program to Replace a Word with Asterisks in a Sentence

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Replace word in file python: In the previous article, we have discussed Python Program to Find Sum of Odd Factors of a Number
Given a sentence and the task is to replace a word with asterisks in a given Sentence.

Examples:

Example1:

Input:

Given string = "hello this is btechgeeks btechgeeks"
Given word to be replaced = "btechgeeks"

Output:

The given string [ hello this is btechgeeks btechgeeks ] after replacing with a given word with an asterisk :
hello this is ********** **********

Example2:

Input:

Given string = "good morning this is btechgeeks good morning all"
Given word to be replaced = "good"

Output:

The given string [ good morning this is btechgeeks good morning all ] after replacing with a given word with an asterisk :
**** morning this is btechgeeks **** morning all

Program to Replace a Word with Asterisks in a Sentence in Python

Below are the ways to replace a word with asterisks in a given Sentence:

Method #1: Using For Loop (Static Input)

Approach:

  • Give the string as static input and store it in a variable.
  • Give the replaceable word as static input and store it in another variable.
  • Split the given string into a list of words using the split() function and store it in another variable say “wrd_lst”.
  • Multiply the asterisk symbol with the length of the given input word using the len() function and store it in another variable say “replaced_word”.
  • Loop in the above-obtained word list using the for loop.
  • Check if the word at the iterator index is equal is given input word using the if conditional statement.
  • If the statement is true, replace the word at the iterator index with the replaced_word.
  • Convert the above-got word list to string using the join() function.
  • Print the above-obtained string to replace a word with an asterisk in a given input sentence.
  • The Exit of the Program.

Below is the implementation:

# Give the string as static input and store it in a variable.
gvn_str = "hello this is btechgeeks btechgeeks"
# Give the replaceable word as static input and store it in another variable.
gvn_wrd = "btechgeeks"
# Split the given string into a list of words using the split() function and
# store it in another variable say "wrd_lst".
wrd_lst = gvn_str.split()
# Multiply the asterisk symbol with the length of the given input word using
# the len() function and store it in another variable.
replacd_word = '*' * len(gvn_wrd)
# Loop in the above-obtained word list using the for loop.
for itr in range(len(wrd_lst)):
  # Check if the iterator value is equal to the given input word using the if
  # conditional statement.
 # check if thw word at the iterator index is equal is given
    if wrd_lst[itr] == gvn_wrd:
      # if it is truw thwn replce the word t the iterator index with the replaced word
        wrd_lst[itr] = replacd_word
# Convert the above-got word list to string using the join() function.
finl_str = ' '.join(wrd_lst)
# Print the above-obtained string to replace a word with an asterisk in a
# given input sentence.
print("The given string [", gvn_str,
      "] after replacing with a given word with an asterisk :")
print(finl_str)

Output:

The given string [ hello this is btechgeeks btechgeeks ] after replacing with a given word with an asterisk :
hello this is ********** **********

Method #2: Using For loop (User Input)

Approach:

  • Give the string as user input using the input() function and store it in a variable.
  • Give the replaceable word as user input using the input() function and store it in another variable.
  • Split the given string into a list of words using the split() function and store it in another variable say “wrd_lst”.
  • Multiply the asterisk symbol with the length of the given input word using the len() function and store it in another variable say “replaced_word”.
  • Loop in the above-obtained word list using the for loop.
  • Check if the word at the iterator index is equal is given input word using the if conditional statement.
  • If the statement is true, replace the word at the iterator index with the replaced_word.
  • Convert the above-got word list to string using the join() function.
  • Print the above-obtained string to replace a word with an asterisk in a given input sentence.
  • The Exit of the Program.

Below is the implementation:

# Give the string as user input using the input() function and store it in a variable.
gvn_str = input("Enter some random sentence = ")
# Give the replaceable word as user input using the input() function and store it in another variable.
gvn_wrd = input("Enter some random word = ")
# Split the given string into a list of words using the split() function and
# store it in another variable say "wrd_lst".
wrd_lst = gvn_str.split()
# Multiply the asterisk symbol with the length of the given input word using
# the len() function and store it in another variable.
replacd_word = '*' * len(gvn_wrd)
# Loop in the above-obtained word list using the for loop.
for itr in range(len(wrd_lst)):
  # Check if the iterator value is equal to the given input word using the if
  # conditional statement.
 # check if thw word at the iterator index is equal is given
    if wrd_lst[itr] == gvn_wrd:
      # if it is truw thwn replce the word t the iterator index with the replaced word
        wrd_lst[itr] = replacd_word
# Convert the above-got word list to string using the join() function.
finl_str = ' '.join(wrd_lst)
# Print the above-obtained string to replace a word with an asterisk in a
# given input sentence.
print("The given string [", gvn_str,
      "] after replacing with a given word with an asterisk :")
print(finl_str)

Output:

Enter some random sentence = good morning this is btechgeeks good morning all
Enter some random word = good
The given string [ good morning this is btechgeeks good morning all ] after replacing with a given word with an asterisk :
**** morning this is btechgeeks **** morning all

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