[issue40997] python 3.8.2: datetime.datetime(1969, 1, 1).timestamp() yields OSError

[SilentGhost]

SilentGhost  added the comment:

This looks like a duplicate of #37527.

--
nosy: +SilentGhost, belopolsky, p-ganssle
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> Timestamp conversion on windows fails with timestamps close to 
EPOCH

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[issue40997] python 3.8.2: datetime.datetime(1969, 1, 1).timestamp() yields OSError

[Eddie Parker]

New submission from Eddie Parker :

Running the following yields an unexpected OSError: Invalid argument:

Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 23:03:10) [MSC v.1916 64 bit 
(AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import datetime
>>> datetime.datetime(1000,1,1).timestamp()
>>> datetime.datetime(1969,1,1).timestamp()
Traceback (most recent call last):
  File "", line 1, in 
OSError: [Errno 22] Invalid argument

I understand that the time can't yield a valid timestamp, but the exception 
doesn't really explain that and the documentation doesn't mention OSError as an 
exception to indicate an invalid date is specified.

Ideally a better exception could be used (ValueError?) or the documentation 
could mention this possibility?  Or even better, allow timestamp() to take a 
parameter for what to return in the case of an invalid timestamp (None?)

I mention this because I hit this in some asyncio code which was a nuisance to 
debug and finding it excepting on a timestamp that had worked before with an OS 
error baffled me until I got it in a debugger.

Thanks as always!

--
components: Library (Lib)
messages: 371710
nosy: Eddie Parker
priority: normal
severity: normal
status: open
title: python 3.8.2: datetime.datetime(1969,1,1).timestamp() yields OSError
type: behavior
versions: Python 3.8

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