def __init__(self, year=None, month=None, day=None, hour=None, minute=None,
second=None, microsecond=None):
if isinstance(year, datetime):
dt = year
self.year, self.month, self.day = dt.year, dt.month, dt.day
self.hour, self.minute, self.second = dt.hour, dt.minute, dt.second
self.microsecond = dt.microsecond
else:
if month is not None and (month < 1 or month > 12):
raise TimeError("month must be in 1..12")
if day is not None and day < 1:
raise TimeError("day must be greater than 1")
if (year is not None and month is not None and day is not None
and day > calendar.monthrange(year, month)[1]):
raise TimeError("day is out of range for month")
if hour is not None and (hour < 0 or hour > 23):
raise TimeError("hour must be in 0..23")
if minute is not None and (minute < 0 or minute > 59):
raise TimeError("minute must be in 0..59")
if second is not None and (second < 0 or second > 59):
raise TimeError("second must be in 0..59")
if microsecond is not None and (microsecond < 0
or microsecond > 999999):
raise TimeError("microsecond must be in 0..999999")
self.year, self.month, self.day = year, month, day
self.hour, self.minute, self.second = hour, minute, second
self.microsecond = microsecond
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