def to_timestamp(self, freq=None, how="start"):
"""
Cast to DatetimeArray/Index.
Parameters
----------
freq : str or DateOffset, optional
Target frequency. The default is 'D' for week or longer,
'S' otherwise.
how : {'s', 'e', 'start', 'end'}
Whether to use the start or end of the time period being converted.
Returns
-------
DatetimeArray/Index
"""
from pandas.core.arrays import DatetimeArray
how = libperiod.validate_end_alias(how)
end = how == "E"
if end:
if freq == "B" or self.freq == "B":
# roll forward to ensure we land on B date
adjust = Timedelta(1, "D") - Timedelta(1, "ns")
return self.to_timestamp(how="start") + adjust
else:
adjust = Timedelta(1, "ns")
return (self + self.freq).to_timestamp(how="start") - adjust
if freq is None:
base = self.freq._period_dtype_code
freq = libfrequencies.get_to_timestamp_base(base)
base = freq
else:
freq = Period._maybe_convert_freq(freq)
base = freq._period_dtype_code
new_data = self.asfreq(freq, how=how)
new_data = libperiod.periodarr_to_dt64arr(new_data.asi8, base)
return DatetimeArray(new_data)._with_freq("infer")
def to_timestamp(self, freq=None, how='start'):
"""
Cast to DatetimeArray/Index.
Parameters
----------
freq : string or DateOffset, optional
Target frequency. The default is 'D' for week or longer,
'S' otherwise
how : {'s', 'e', 'start', 'end'}
Returns
-------
DatetimeArray/Index
"""
from pandas.core.arrays import DatetimeArray
how = libperiod._validate_end_alias(how)
end = how == 'E'
if end:
if freq == 'B':
# roll forward to ensure we land on B date
adjust = Timedelta(1, 'D') - Timedelta(1, 'ns')
return self.to_timestamp(how='start') + adjust
else:
adjust = Timedelta(1, 'ns')
return (self + self.freq).to_timestamp(how='start') - adjust
if freq is None:
base, mult = libfrequencies.get_freq_code(self.freq)
freq = libfrequencies.get_to_timestamp_base(base)
else:
freq = Period._maybe_convert_freq(freq)
base, mult = libfrequencies.get_freq_code(freq)
new_data = self.asfreq(freq, how=how)
new_data = libperiod.periodarr_to_dt64arr(new_data.asi8, base)
return DatetimeArray._from_sequence(new_data, freq='infer')
def test_get_to_timestamp_base(freqstr, exp_freqstr):
left_code = to_offset(freqstr)._period_dtype_code
exp_code = to_offset(exp_freqstr)._period_dtype_code
assert get_to_timestamp_base(left_code) == exp_code
