In [1]: import numcodecs

In [2]: f = numcodecs.Fletcher32()

In [3]: result = f.encode( b"Hello world")

In [5]: import numpy as np

In [6]: f.decode(result, out = np.zeros(11, dtype="u1"))
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In[6], line 1
----> 1 f.decode(result, out = np.zeros(11, dtype="u1"))

File ~/src/numcodecs/numcodecs/fletcher32.pyx:82, in numcodecs.fletcher32.Fletcher32.decode()
     80         "This could be a sign that the data has been corrupted."
     81     )
---> 82 if out:
     83     out.view("uint8")[:] = b[:-4]
     84     return out

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()