freeCodeCamp/guide/english/python/string-methods/string-replace-method/index.md

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String Replace Method

String Replace Method

The str.replace(old, new, max) method is used to replace the substring old with the string new for a total of max times. This method returns a new copy of the string with the replacement. The original string str is unchanged.

Examples

1. Replace all occurrences of "is" with "WAS"

string = "This is nice. This is good."
newString = string.replace("is","WAS")
print(newString)

Output

ThWAS WAS nice. ThWAS WAS good.

2. Replace the first 2 occurrences of "is" with "WAS"

string = "This is nice. This is good."
newString = string.replace("is","WAS", 2)
print(newString)

Output

ThWAS WAS nice. This is good.

More Information:

Read more about string replacement in the Python docs