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Python – Replace K with Multiple values
• Last Updated : 03 Jul, 2020

Sometimes, while working with Python Strings, we can have a problem in which we need to perform replace of single character/work with particular list of values, based on occurrence. This kind of problem can have application in school and day-day programming. Let’s discuss certain ways in which this task can be performed.

Input : test_str = ‘* is * . It is recommended for *’, repl_char = ‘*’,
repl_list = [‘Gfg’, ‘Best’, ‘CS’]
Output : Gfg is Best . It is recommended for CS

Input : test_str = ‘* is *’, repl_char = ‘*’,
repl_list = [‘Gfg’, ‘Best’]
Output : Gfg is Best

Method #1 : Using loop + `replace()`
The combination of above functions can be used to solve this problem. In this, we perform the task of replacing using replace() and increase the index counter after each replacment.

 `# Python3 code to demonstrate working of  ` `# Replace K with Multiple values ` `# Using loop + replace() ` ` `  `# initializing strings ` `test_str ``=` `'_ is _ . It is recommended for _'` ` `  `# printing original string ` `print``(``"The original string is : "` `+` `str``(test_str)) ` ` `  `# initializing repl_char ` `repl_char ``=` `'_'` ` `  `# initializing repl_list  ` `repl_list ``=` `[``'Gfg'``, ``'Best'``, ``'CS'``] ` ` `  `# Replace K with Multiple values ` `# Using loop + replace() ` `for` `ele ``in` `repl_list: ` `    ``test_str ``=` `test_str.replace(repl_char, ele, ``1``) ` ` `  `# printing result  ` `print``(``"String after replacement : "` `+` `str``(test_str))  `

Output :

```The original string is : _ is _ . It is recommended for _
String after replacement : Gfg is Best . It is recommended for CS
```

Method #2 : Using `split() + join() + zip()`
The combination of above functions offer yet another way to solve this problem. In this, we first split the word using split(), zip both required lists using zip() and then rejoin with appropriate replacement.

 `# Python3 code to demonstrate working of  ` `# Replace K with Multiple values ` `# Using split() + join() + zip() ` ` `  `# initializing strings ` `test_str ``=` `'_ is _ . It is recommended for _'` ` `  `# printing original string ` `print``(``"The original string is : "` `+` `str``(test_str)) ` ` `  `# initializing repl_char ` `repl_char ``=` `'_'` ` `  `# initializing repl_list  ` `repl_list ``=` `[``'Gfg'``, ``'Best'``, ``'CS'``] ` ` `  `# Replace K with Multiple values ` `# Using split() + join() + zip() ` `test_list ``=` `test_str.split(repl_char) ` `temp ``=` `zip``(test_list, repl_list) ` `res ``=` `''.join([ele ``for` `sub ``in` `temp ``for` `ele ``in` `sub]) ` ` `  `# printing result  ` `print``(``"String after replacement : "` `+` `str``(res))  `

Output :

```The original string is : _ is _ . It is recommended for _
String after replacement : Gfg is Best . It is recommended for CS
```

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