How to get a substring with variable indices

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Hello all!

I have a string named text. I need to extract a substring from it
starting by variable 's' and ending by 'e'.

text[s:e] generates the following error:

TypeError: slice indices must be integers or None


How to be?

Regards, Stanislav Yaglo.

 

[Paul Rubin]

text[s:e] generates the following error:
TypeError: slice indices must be integers or None

How to be?

s and e both have to be integers or None. Try printing them out just
before your slice to see if their values are reasonable.

>>> s = 2
>>> e = 4
>>> "python"[s:e]

'th'