How to find a substring using two indexes/positions in Python

Question

I want to find sub-string using indexes, like:

"I am a boy!" 

and if I have positions 3 and 5, then the sub-string will be "am".

Is there a command or way to do this?

Answer 1

You can use slicing. As indexes are 0 based in python so you've to use 2 and 4.

>>> strs = "I am a boy!"
>>> strs[2:4]            
'am'

If you're new to slicing : Explain Python's slice notation

Answer 2

Subtract 1 from indices for 0 indexed

>>> text = "I am a boy!"
>>> text[2:4]
'am'

Answer 3

You can use slicing, like follows. You'll have to subtract 1 from your index, since indexing starts from 0 i.e the first character is at index 0.

>>> string = "I am a boy!"
>>> startPosition = 3
>>> endPosition = 5
>>> string[startPosition-1:endPosition-1]
'am'