all Python 3Byte sequencesfunction

bytearray.rindex

bytearray — search

Like rfind, but raises ValueError if not found.

Syntax

ba.rindex(...)

Use it where the last occurrence is required by contract: a separator in a path, the dot before an extension. A vanished separator then raises instead of silently sliding to -1 and producing a nonsense slice. For the common "everything after the last separator" job, rpartition() is usually cleaner — it handles the not-found case for you, no try/except needed.

Examples

print(bytearray(b'banana').rindex(b'na'))   # → 4
print(bytearray(b'banana').rindex(b'a'))   # → 5
print(bytearray(b'banana').rindex(b'na', 0, 4))   # → 2
print(bytearray(b'banana').rindex(b'z'))   # → ValueError
print(bytearray(b'banana').rfind(b'z'))   # → -1

See also

Common errors

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