Reassign problem

Question

Is it possible to reassign a letter in a string?
Like:
str='work'

I want to replace k with d, but
str='work'
str[3]=d
is not working.

Is there any other useful way?

Answer 1

strings are not mutable (i.e. cannot be changed) in Python. One approach could be: turn the string into a list, then change the list, and finally use 'join' to turn the list back into a string.

Answer 2

you can use somestring=somestring.replace (oldchar, newchar)