New submission from Sam Roberts <[email protected]>:
Python 3.9.2 (tags/v3.9.2:1a79785, Feb 19 2021, 13:44:55) [MSC v.1928 64 bit
(AMD64)] on win32
datetime.fromtimestamp() fails for naive-datetime values prior to the start of
the epoch, but for some reason works properly for aware-datetime values prior
to the start of the epoch.
This is at least inconsistent, but seems like a bug.
Negative timestamps for dates prior to the start of the epoch are used by yahoo
finance and in the yfinance module.
>>> import datetime
>>> start = int(datetime.datetime(1962, 1, 31,
>>> tzinfo=datetime.timezone.utc).timestamp())
>>> start
-249868800
>>> start = int(datetime.datetime(1962, 1, 31).timestamp())
Traceback (most recent call last):
File "<pyshell#3>", line 1, in <module>
start = int(datetime.datetime(1962, 1, 31).timestamp())
OSError: [Errno 22] Invalid argument
----------
components: Library (Lib)
messages: 412649
nosy: smrpy
priority: normal
severity: normal
status: open
title: datetime.datetime.fromtimestamp
type: behavior
versions: Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue46660>
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