Difference between find and index function in Python .

Answer 1

str.find returns -1 when it does not find the substring.

>>> line = 'hi, this is ABC oh my god!!' >>> line.find('?') -1

While str.index raises ValueError:

>>> line.index('?') Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: substring not found

Both the functions behave the same way if a sub-string is found.

source: https://stackoverflow.com/a/22190078

Answer 2

visp@ thanks