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"""Use Python datetime module to handle date and time columns."""
# datetime is only in Python 2.3 or newer, so it is safe to use
# string methods. However, have to use apply(func, args) instead
# of func(*args) because 1.5.2 will reject the syntax.
from time import localtime
from datetime import date, datetime, time, timedelta
Date = date
Time = time
Timestamp = datetime
DateTimeDeltaType = type(timedelta)
DateTimeType = type(datetime)
def DateFromTicks(ticks):
"""Convert UNIX ticks into a date instance."""
return apply(date, localtime(ticks)[:3])
def TimeFromTicks(ticks):
"""Convert UNIX ticks into a time instance."""
return apply(time, localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
"""Convert UNIX ticks into a datetime instance."""
return apply(datetime, localtime(ticks)[:6])
format_TIME = format_TIMESTAMP = format_DATE = str
def DateTime_or_None(s):
if ' ' in s:
sep = ' '
elif 'T' in s:
sep = 'T'
else:
return None
try:
d, t = s.split(sep, 1)
return apply(datetime, tuple(d.split('-')+t.split(':')))
except:
return None
def TimeDelta_or_None(s):
try:
h, m, s = map(float, s.split(':'))
if h < 0:
return -timedelta(hours=h, minutes=m, seconds=s)
else:
return timedelta(hours=h, minutes=m, seconds=s)
except:
return None
def Date_or_None(s):
try: return apply(date, tuple(s.split('-',2)))
except: return None
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