On Thu, Sep 01, 2022 at 03:11:29PM -0700, Bruce Leban wrote:
> * a stream-like object that has been closed and you attempt to read from or
> write data to it.
That would be a ValueError:
>>> f.write('a')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: I/O operation on closed file.
Its arguable that this could (should?) have been some sort of IOError
instead, but that ship has sailed.
> * a random number generator that has not been initialized with a seed (in
> the case where you have a constructor which doesn't also initialize it).
That would be a bug in the constructor.
> * a hash function which you try to compute the digest without having added
> any data to it.
That shouldn't be an error at all:
>>> a = hashlib.sha256()
>>> a.hexdigest()
'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
--
Steve
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