Since we passed 1, only the first occurrence ( from left) of the old substring be was replaced by the new substring code and all the other occurrences were unchanged in the returned string.įor more on python string replace function, refer to the python docs. How does replace () function works str.replace (pattern,replaceWith,maxCount) takes minimum two parameters and replaces all occurrences of pattern with specified sub-string replaceWith. This argument controls the number of replacements to be made. We solve this problem in python quickly using replace () method of string data type. In the above example, we pass the third argument to the replace function. In the above example, since the value passed for the old parameter, was is not present in the string, a copy of the original string without any replacement is returned.Įxample 3: Replacing only a fixed number of occurrences. Output: Original string: to be or not to be In the above example, all the occurrences of the underscore symbol, _, have been replaced by a single space, ' ', in the returned string.Įxample 2: When the substring to be replaced is not present s = "to be or not to be" Output: Original string: to_be_or_not_to_be ExamplesĮxample 1: Replace all the occurrences of underscores _ with a single space ' '. s 'to be or not to be' print(s. It is an inbuilt string function that returns a copy of the string where occurrences of the original substring have been replaced by the new substring. replace ('go', 'GO')) Prints the string by replacing only 2 occurrence of go print(str. But where exactly do we want to go' Prints the string by replacing go by GO print(str. Note: If the value passed for the old parameter is not found, a copy of the original string without any change is returned. In python, the string replace function, replace (), is used to replace the occurrences of a substring with a different substring. Python3 program to demonstrate the usage of replace () function str 'Let's go to a place, from where we can go to another. If it’s not provided, all the occurrences of the old substring are replaced by the new substring.Ī copy of the original string with occurrences of the old substring replaced by the new substring. count ( optional): The number of times you want to replace the occurrence of the old substring with the new one.new: The new substring you want to replace the old substring with.The following is the syntax to use the python string replace function, replace(): str.replace(old, new, count) In python, the string replace function, replace(), is used to replace the occurrences of a substring with a different substring.
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