70 lines
2.1 KiB
Python
70 lines
2.1 KiB
Python
import decimal
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import datetime
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import re
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date_re = r'(?P<year>-?\d{4,})-(?P<month>\d{2})-(?P<day>\d{2})'
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time_re = r'(?P<hour>\d{2}):(?P<min>\d{2}):(?P<sec>\d{2})' + \
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r'(\.(?P<sec_frac>\d+))?'
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tz_re = r'((?P<tz_sign>[+-])(?P<tz_hour>\d{2}):(?P<tz_min>\d{2}))' + \
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r'|(?P<tz_z>Z)'
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datetime_re = re.compile(
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'%sT%s(%s)?' % (date_re, time_re, tz_re))
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date_re = re.compile(date_re)
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time_re = re.compile(time_re)
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def parse_isodate(value):
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m = date_re.match(value)
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if m is None:
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raise ValueError("'%s' is not a legal date value" % (value))
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try:
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return datetime.date(
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int(m.group('year')),
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int(m.group('month')),
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int(m.group('day')))
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except ValueError:
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raise ValueError("'%s' is a out-of-range date" % (value))
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def parse_isotime(value):
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m = time_re.match(value)
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if m is None:
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raise ValueError("'%s' is not a legal time value" % (value))
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try:
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ms = 0
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if m.group('sec_frac') is not None:
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f = decimal.Decimal('0.' + m.group('sec_frac'))
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f = str(f.quantize(decimal.Decimal('0.000001')))
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ms = int(f[2:])
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return datetime.time(
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int(m.group('hour')),
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int(m.group('min')),
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int(m.group('sec')),
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ms)
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except ValueError:
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raise ValueError("'%s' is a out-of-range time" % (value))
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# TODO handle timezone
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def parse_isodatetime(value):
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m = datetime_re.match(value)
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if m is None:
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raise ValueError("'%s' is not a legal datetime value" % (value))
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try:
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ms = 0
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if m.group('sec_frac') is not None:
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f = decimal.Decimal('0.' + m.group('sec_frac'))
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f = f.quantize(decimal.Decimal('0.000001'))
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ms = int(str(f)[2:])
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return datetime.datetime(
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int(m.group('year')),
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int(m.group('month')),
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int(m.group('day')),
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int(m.group('hour')),
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int(m.group('min')),
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int(m.group('sec')),
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ms)
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except ValueError:
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raise ValueError("'%s' is a out-of-range datetime" % (value))
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