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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.
from time import localtime
from datetime import date, datetime, time, timedelta
Date = date
Time = time
TimeDelta = timedelta
Timestamp = datetime
DateTimeDeltaType = timedelta
DateTimeType = datetime
def DateFromTicks(ticks):
"""Convert UNIX ticks into a date instance."""
return date(*localtime(ticks)[:3])
def TimeFromTicks(ticks):
"""Convert UNIX ticks into a time instance."""
return time(*localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
"""Convert UNIX ticks into a datetime instance."""
return datetime(*localtime(ticks)[:6])
format_TIME = format_DATE = str
def format_TIMESTAMP(d):
return d.strftime("%Y-%m-%d %H:%M:%S")
def DateTime_or_None(s):
if ' ' in s:
sep = ' '
elif 'T' in s:
sep = 'T'
else:
return Date_or_None(s)
try:
d, t = s.split(sep, 1)
return datetime(*[ int(x) for x in d.split('-')+t.split(':') ])
except:
return Date_or_None(s)
def TimeDelta_or_None(s):
from math import modf
try:
h, m, s = s.split(':')
td = timedelta(hours=int(h), minutes=int(m), seconds=int(s),
microseconds=int(modf(float(s))[0])*1000000)
if h < 0:
return -td
else:
return td
except:
return None
def Time_or_None(s):
from math import modf
try:
h, m, s = s.split(':')
return time(hour=int(h), minute=int(m), second=int(s),
microsecond=int(modf(float(s))[0])*1000000)
except:
return None
def Date_or_None(s):
try: return date(*[ int(x) for x in s.split('-',2)])
except: return None