[issue35796] time.localtime returns error for negative values

[Ammar Askar]

Ammar Askar  added the comment:

Victor is correct, this is a limitation in Windows. As the documentation for 
time notes:

>Although this module is always available, not all functions are available on 
>all platforms. Most of the functions defined in this module call platform C 
>library functions with the same name. It may sometimes be helpful to consult 
>the platform documentation, because the semantics of these functions varies 
>among platforms.

https://docs.python.org/3/library/time.html#module-time

And as the Windows documentation notes: 

>less than 0 or greater than _MAX__TIME64_T: EINVAL

https://msdn.microsoft.com/en-us/library/a442x3ye.aspx?f=255=-2147217396

--
nosy: +ammar2
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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[issue35796] time.localtime returns error for negative values

[STINNER Victor]

STINNER Victor  added the comment:

It's a limitation of the Windows C library. I'm quite sure that Python 2 has a 
the same issue, it shouldn't be a regression.

--
nosy: +vstinner

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[issue35796] time.localtime returns error for negative values

[Mba]

New submission from Mba :

Steps to reproduce the bug:
```
>>> import sys
>>> sys.version
'3.6.7 (v3.6.7:6ec5cf24b7, Oct 20 2018, 13:35:33) [MSC v.1900 64 bit (AMD64)]'

>>> import datetime
>>> print(datetime.datetime.now().astimezone().tzinfo)
datetime.timezone(datetime.timedelta(0, 3600), 'Central European Standard Time')

>>> import time
>>> time.localtime(0)
time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=1, tm_min=0, 
tm_sec=0, tm_wday=3, tm_yday=1, tm_isdst=0)
>>> time.localtime(-1)
Traceback (most recent call last):
  File "", line 1, in 
OSError: [Errno 22] Invalid argument
```

On Ubuntu it works fine:
```
>>> time.localtime(-1)
time.struct_time(tm_year=1970, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=59, 
tm_sec=59, tm_wday=3, tm_yday=1, tm_isdst=0)
```

--
components: Windows
messages: 334132
nosy: mba, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: time.localtime returns error for negative values
type: behavior
versions: Python 3.6

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