Strings in python are immutable. Below is an example that illustrates that characteristic of strings:

We get the error mentioned above : "TypeError: 'str' object does not support item assignment".

To be able to change our string "str1", we use a string slice as below - String[start:stop] - :

The "id()" function prints the address in memory of the string "str1".

We notice that our string "str1" points to another new location - after we change its value - that contains now the string "fragon"