def tz_validate(self):
"""
For a localized time zone, verify that there are no DST ambiguities
(using pytz)
Returns
-------
result : boolean
True if there are no DST ambiguities
"""
import pytz
if self.tz is None or self.tz is pytz.utc:
return True
# See if there are any DST resolution problems
try:
lib.tz_localize(self.asi8, self.tz)
except:
return False
return True
def tz_localize(self, tz):
"""
Localize tz-naive DatetimeIndex to given time zone (using pytz)
Returns
-------
localized : DatetimeIndex
"""
if self.tz is not None:
raise ValueError("Already have timezone info, "
"use tz_normalize to convert.")
tz = tools._maybe_get_tz(tz)
new_dates = lib.tz_localize(self.asi8, tz)
new_dates = new_dates.view('M8[us]')
new_dates = new_dates.view(self.__class__)
new_dates.offset = self.offset
new_dates.tz = tz
new_dates.name = self.name
return new_dates
def tz_normalize(self, tz):
"""
Convert DatetimeIndex from one time zone to another (using pytz)
Returns
-------
normalized : DatetimeIndex
"""
tz = tools._maybe_get_tz(tz)
if self.tz is None:
new_dates = lib.tz_localize(self.asi8, tz)
else:
new_dates = lib.tz_convert(self.asi8, self.tz, tz)
new_dates = new_dates.view('M8[us]')
new_dates = new_dates.view(type(self))
new_dates.offset = self.offset
new_dates.tz = tz
new_dates.name = self.name
return new_dates
