'in-place' string modifications in Python

Question

In Python, strings are immutable.

What is the standard idiom to walk through a string character-by-character and modify it?

The only methods I can think of a

Answer 1

Strings are iterable and can be walked through like lists. Strings also have a number of basic methods such as .replace() that might be what you're looking for. All string methods return a new string. So instead of modifying the string in place you can simply replace its existing value.

>>> mystring = 'robot drama'
>>> mystring = mystring.replace('r', 'g')
>>> mystring
'gobot dgama'