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str.index

builtins

method of str
  • str.index(sub[, start[, end]])
Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end].

Optional arguments start and end are interpreted as in slice
notation.  Raises ValueError when the substring is not found.
© Python Software Foundation. PSF License Version 2 · Official docs ↗
1 Example
>>> 'spam, spam, spam'.index('spam')
0
>>> 'spam, spam, spam'.index('eggs')
Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    'spam, spam, spam'.index('eggs')
    ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
ValueError: substring not found
from the Python docs
See Also
No see-alsos for builtins/str.index
0 Notes
No notes for str.index