Python - Random Replacement of Word in String
Given a string and List, replace each occurrence of K word in string with random element from list.
Input : test_str = "Gfg is x. Its also x for geeks", repl_list = ["Good", "Better", "Best"], repl_word = "x" Output : Gfg is Best. Its also Better for geeks Explanation : x is replaced by random replace list values. Input : test_str = "Gfg is x. Its also x for geeks", repl_list = ["Good", "Better", "Nice"], repl_word = "x" Output : Gfg is Best. Its also Nice for geeks Explanation : x is replaced by random replace list values, "Best" and "Nice".
Method #1 : Using shuffle() + loop + replace()
The combination of above functions can be used to solve this problem. In this, we replace each occurrence of K word with random string from list using replace().
# Python3 code to demonstrate working of
# Random Replacement of Word in String
# Using replace() + shuffle() + loop
from random import shuffle
# initializing string
test_str = "Gfg is val. Its also val for geeks"
# printing original string
print("The original string is : " + str(test_str))
# initializing list
repl_list = ["Good", "Better", "Best"]
# initializing replace word
repl_word = "val"
# shuffing list order
shuffle(repl_list)
for ele in repl_list:
# replacing with random string
test_str = test_str.replace(repl_word, ele, 1)
# printing result
print("String after random replacement : " + str(test_str))
Output
The original string is : Gfg is val. Its also val for geeks String after random replacement : Gfg is Best. Its also Better for geeks
Time Complexity: O(n*n) where n is the number of elements in the list âtest_listâ.
Auxiliary Space: O(n) where n is the number of elements in the list âtest_listâ.
Method #2 : Using list comprehension + replace() + shuffle()
This is one of the ways in which this task can be performed. In this, we encapsulate entire logic in one-liner using similar functionalities as above method.
# Python3 code to demonstrate working of
# Random Replacement of Word in String
# Using list comprehension + replace() + shuffle()
from random import shuffle
# initializing string
test_str = "Gfg is val. Its also val for geeks"
# printing original string
print("The original string is : " + str(test_str))
# initializing list
repl_list = ["Good", "Better", "Best"]
# initializing replace word
repl_word = "val"
# one-liner to solve problem
shuffle(repl_list)
res = [test_str.replace(repl_word, ele, 1) for ele in repl_list]
# printing result
print("String after random replacement : " + str(res))
Output
The original string is : Gfg is val. Its also val for geeks String after random replacement : ['Gfg is Good. Its also val for geeks', 'Gfg is Better. Its also val for geeks', 'Gfg is Best. Its also val for geeks']
The Time and Space Complexity for all the methods are the same:
Time Complexity: O(n)
Space Complexity: O(n)
