# 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

 `# 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

```

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

 `# 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’]

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