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Week Start/End Resamping: WS/WE frequencies #15449

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Week Start/End Resamping: WS/WE frequencies #15449

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7 changes: 5 additions & 2 deletions pandas/tseries/frequencies.py
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Original file line number Diff line number Diff line change
Expand Up @@ -361,8 +361,8 @@ def _get_freq_str(base, mult=1):


from pandas.tseries.offsets import (Nano, Micro, Milli, Second, # noqa
Minute, Hour,
Day, BDay, CDay, Week, MonthBegin,
Minute, Hour, Day, BDay, CDay,
WeekBegin, Week, MonthBegin,
MonthEnd, BMonthBegin, BMonthEnd,
QuarterBegin, QuarterEnd, BQuarterBegin,
BQuarterEnd, YearBegin, YearEnd,
Expand Down Expand Up @@ -398,6 +398,7 @@ def _get_freq_str(base, mult=1):
'Q': 'Q',
'A': 'A',
'W': 'W',
'WS': 'W',
'M': 'M'
}

Expand All @@ -414,6 +415,7 @@ def _get_freq_str(base, mult=1):
_days = ['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN']
for _d in _days:
_offset_to_period_map['W-%s' % _d] = 'W-%s' % _d
_offset_to_period_map['WS-%s' % _d] = 'WS-%s' % _d


def get_period_alias(offset_str):
Expand All @@ -423,6 +425,7 @@ def get_period_alias(offset_str):

_lite_rule_alias = {
'W': 'W-SUN',
'WS': 'WS-MON',
'Q': 'Q-DEC',

'A': 'A-DEC', # YearEnd(month=12),
Expand Down
7 changes: 6 additions & 1 deletion pandas/tseries/offsets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@
'YearBegin', 'BYearBegin', 'YearEnd', 'BYearEnd',
'QuarterBegin', 'BQuarterBegin', 'QuarterEnd', 'BQuarterEnd',
'LastWeekOfMonth', 'FY5253Quarter', 'FY5253',
'Week', 'WeekOfMonth', 'Easter',
'WeekBegin', 'Week', 'WeekOfMonth', 'Easter',
'Hour', 'Minute', 'Second', 'Milli', 'Micro', 'Nano',
'DateOffset']

Expand Down Expand Up @@ -1643,6 +1643,10 @@ def _from_name(cls, suffix=None):
return cls(weekday=weekday)


class WeekBegin(Week):
_prefix = 'WS'


class WeekDay(object):
MON = 0
TUE = 1
Expand Down Expand Up @@ -2955,6 +2959,7 @@ def generate_range(start=None, end=None, periods=None,
SemiMonthEnd, # 'SM'
SemiMonthBegin, # 'SMS'
Week, # 'W'
WeekBegin, # 'WS'
Second, # 'S'
Minute, # 'T'
Micro, # 'U'
Expand Down