micropython / micropython/micropython
bytearray slice assignment fails for derived types
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Description
The type check for slice assignment to bytearray derived types seems to be a bit too strict:
class MyBytearray(bytearray): pass
a = MyBytearray(4)
b = MyBytearray(4)
a[0:4] = b
results in this error:
Traceback (most recent call last):
File "test.py", line 5, in <module>
NotImplementedError: array/bytes required on right side
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the provided MyBytearray slice-assignment reproducer and trace the implementation that raises “array/bytes required on right side.” Done means assignment from a bytearray-derived type succeeds without NotImplementedError, with a regression test covering the example.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, python
- Domain
- embedded-iot
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100