gettz('') fails on windows #925
Description
Given the following (tested with Python 3.7 and dateutil 2.8.0):
import dateutil.tz
print(dateutil.tz.gettz(''))On Linux:
None
On Windows:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "H:\src\env\desc\lib\site-packages\dateutil\tz\tz.py", line 1551, in __call__
rv = self.nocache(name=name)
File "H:\src\env\desc\lib\site-packages\dateutil\tz\tz.py", line 1635, in nocache
tz = tzwin(name)
File "H:\src\env\desc\lib\site-packages\dateutil\tz\win.py", line 223, in __init__
self._std_abbr = keydict["Std"]
KeyError: 'Std'