The replace() method returns a copy of the string where all occurrences of a substring is replaced with another substring.

The syntax of replace() is:

str.replace(old, new [, count])

replace() parameters

The replace() method can take maximum of 3 parameters:

.old - old substring you want to replace

.new - new substring which would replace the old substring

. count (optional) - the number of times you want to replace the old substring with the new substring

If count is not specified, replace() method replaces all occurrences of the old substring with the new substring.

If count is not specified, replace() method replaces all occurrences of the old substring with the new substring.

Example 1: How to use replace()?

song = 'cold, cold heart'
print (song.replace('cold', 'hurt'))

song = 'Let it be, let it be, let it be, let it be'

'''only two occurences of 'let' is replaced'''
print(song.replace('let', "don't let", 2))