The syntax of
str.replace(old, new [, count])
replace() method can take maximum of 3 parameters:
- old - old substring you want to replace
- new - new substring which will replace the old substring
- count (optional) - the number of times you want to replace the old substring with the new substring
Note: If count is not specified, the
replace() method replaces all occurrences of the old substring with the new substring.
Return Value from replace()
replace() method returns a copy of the string where the old substring is replaced with the new substring. The original string is unchanged.
If the old substring is not found, it returns the copy of the original string.
Example 1: Using replace()
song = 'cold, cold heart' # replacing 'cold' with 'hurt' print(song.replace('cold', 'hurt')) song = 'Let it be, let it be, let it be, let it be' # replacing only two occurences of 'let' print(song.replace('let', "don't let", 2))
hurt, hurt heart Let it be, don't let it be, don't let it be, let it be
More Examples on String replace()
song = 'cold, cold heart' replaced_song = song.replace('o', 'e') # The original string is unchanged print('Original string:', song) print('Replaced string:', replaced_song) song = 'let it be, let it be, let it be' # maximum of 0 substring is replaced # returns copy of the original string print(song.replace('let', 'so', 0))
Original string: cold, cold heart Replaced string: celd, celd heart let it be, let it be, let it be