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147 lines
3.5 KiB
Python
147 lines
3.5 KiB
Python
"""times module
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This module provides some Date and Time classes for dealing with MySQL data.
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Use Python datetime module to handle date and time columns.
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"""
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from time import localtime
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from datetime import date, datetime, time, timedelta
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from MySQLdb._mysql import string_literal
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Date = date
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Time = time
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TimeDelta = timedelta
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Timestamp = datetime
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DateTimeDeltaType = timedelta
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DateTimeType = datetime
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def DateFromTicks(ticks):
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"""Convert UNIX ticks into a date instance."""
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return date(*localtime(ticks)[:3])
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def TimeFromTicks(ticks):
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"""Convert UNIX ticks into a time instance."""
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return time(*localtime(ticks)[3:6])
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def TimestampFromTicks(ticks):
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"""Convert UNIX ticks into a datetime instance."""
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return datetime(*localtime(ticks)[:6])
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format_TIME = format_DATE = str
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def format_TIMEDELTA(v):
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seconds = int(v.seconds) % 60
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minutes = int(v.seconds // 60) % 60
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hours = int(v.seconds // 3600) % 24
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return "%d %d:%d:%d" % (v.days, hours, minutes, seconds)
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def format_TIMESTAMP(d):
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"""
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:type d: datetime.datetime
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"""
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if d.microsecond:
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fmt = " ".join(
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[
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"{0.year:04}-{0.month:02}-{0.day:02}",
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"{0.hour:02}:{0.minute:02}:{0.second:02}.{0.microsecond:06}",
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]
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)
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else:
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fmt = " ".join(
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[
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"{0.year:04}-{0.month:02}-{0.day:02}",
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"{0.hour:02}:{0.minute:02}:{0.second:02}",
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]
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)
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return fmt.format(d)
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def DateTime_or_None(s):
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try:
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if len(s) < 11:
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return Date_or_None(s)
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micros = s[20:]
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if len(micros) == 0:
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# 12:00:00
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micros = 0
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elif len(micros) < 7:
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# 12:00:00.123456
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micros = int(micros) * 10 ** (6 - len(micros))
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else:
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return None
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return datetime(
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int(s[:4]), # year
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int(s[5:7]), # month
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int(s[8:10]), # day
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int(s[11:13] or 0), # hour
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int(s[14:16] or 0), # minute
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int(s[17:19] or 0), # second
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micros, # microsecond
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)
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except ValueError:
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return None
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def TimeDelta_or_None(s):
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try:
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h, m, s = s.split(":")
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if "." in s:
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s, ms = s.split(".")
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ms = ms.ljust(6, "0")
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else:
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ms = 0
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if h[0] == "-":
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negative = True
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else:
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negative = False
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h, m, s, ms = abs(int(h)), int(m), int(s), int(ms)
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td = timedelta(hours=h, minutes=m, seconds=s, microseconds=ms)
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if negative:
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return -td
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else:
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return td
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except ValueError:
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# unpacking or int/float conversion failed
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return None
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def Time_or_None(s):
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try:
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h, m, s = s.split(":")
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if "." in s:
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s, ms = s.split(".")
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ms = ms.ljust(6, "0")
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else:
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ms = 0
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h, m, s, ms = int(h), int(m), int(s), int(ms)
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return time(hour=h, minute=m, second=s, microsecond=ms)
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except ValueError:
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return None
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def Date_or_None(s):
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try:
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return date(int(s[:4]), int(s[5:7]), int(s[8:10]),) # year # month # day
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except ValueError:
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return None
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def DateTime2literal(d, c):
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"""Format a DateTime object as an ISO timestamp."""
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return string_literal(format_TIMESTAMP(d))
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def DateTimeDelta2literal(d, c):
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"""Format a DateTimeDelta object as a time."""
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return string_literal(format_TIMEDELTA(d))
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