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_os.py	2.24 KB	-rw-r--r--
archive.py	7.88 KB	-rw-r--r--
asyncio.py	1.29 KB	-rw-r--r--
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connection.py	2.19 KB	-rw-r--r--
crypto.py	3.07 KB	-rw-r--r--
datastructures.py	9.66 KB	-rw-r--r--
dateformat.py	9.97 KB	-rw-r--r--
dateparse.py	4.78 KB	-rw-r--r--
dates.py	1.97 KB	-rw-r--r--
datetime_safe.py	2.79 KB	-rw-r--r--
deconstruct.py	1.93 KB	-rw-r--r--
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deprecation.py	5.08 KB	-rw-r--r--
duration.py	1.21 KB	-rw-r--r--
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html.py	15.19 KB	-rw-r--r--
http.py	17.29 KB	-rw-r--r--
inspect.py	2.23 KB	-rw-r--r--
ipv6.py	1.65 KB	-rw-r--r--
itercompat.py	184 B	-rw-r--r--
jslex.py	7.51 KB	-rw-r--r--
log.py	7.7 KB	-rw-r--r--
lorem_ipsum.py	4.66 KB	-rw-r--r--
module_loading.py	3.51 KB	-rw-r--r--
numberformat.py	3.53 KB	-rw-r--r--
regex_helper.py	12.44 KB	-rw-r--r--
safestring.py	1.72 KB	-rw-r--r--
termcolors.py	7.19 KB	-rw-r--r--
text.py	15.49 KB	-rw-r--r--
timesince.py	3.41 KB	-rw-r--r--
timezone.py	7.98 KB	-rw-r--r--
topological_sort.py	1.18 KB	-rw-r--r--
tree.py	4.8 KB	-rw-r--r--
version.py	3.34 KB	-rw-r--r--
xmlutils.py	1.12 KB	-rw-r--r--

Code Editor : dateparse.py

"""Functions to parse datetime objects."""

# We're using regular expressions rather than time.strptime because:
# - They provide both validation and parsing.
# - They're more flexible for datetimes.
# - The date/datetime/time constructors produce friendlier error messages.

import datetime

from django.utils.regex_helper import _lazy_re_compile
from django.utils.timezone import get_fixed_timezone, utc

date_re = _lazy_re_compile(
    r'(?P<year>\d{4})-(?P<month>\d{1,2})-(?P<day>\d{1,2})$'
)

time_re = _lazy_re_compile(
    r'(?P<hour>\d{1,2}):(?P<minute>\d{1,2})'
    r'(?::(?P<second>\d{1,2})(?:[\.,](?P<microsecond>\d{1,6})\d{0,6})?)?'
)

datetime_re = _lazy_re_compile(
    r'(?P<year>\d{4})-(?P<month>\d{1,2})-(?P<day>\d{1,2})'
    r'[T ](?P<hour>\d{1,2}):(?P<minute>\d{1,2})'
    r'(?::(?P<second>\d{1,2})(?:[\.,](?P<microsecond>\d{1,6})\d{0,6})?)?'
    r'(?P<tzinfo>Z|[+-]\d{2}(?::?\d{2})?)?$'
)

standard_duration_re = _lazy_re_compile(
    r'^'
    r'(?:(?P<days>-?\d+) (days?, )?)?'
    r'(?P<sign>-?)'
    r'((?:(?P<hours>\d+):)(?=\d+:\d+))?'
    r'(?:(?P<minutes>\d+):)?'
    r'(?P<seconds>\d+)'
    r'(?:[\.,](?P<microseconds>\d{1,6})\d{0,6})?'
    r'$'
)

# Support the sections of ISO 8601 date representation that are accepted by
# timedelta
iso8601_duration_re = _lazy_re_compile(
    r'^(?P<sign>[-+]?)'
    r'P'
    r'(?:(?P<days>\d+(.\d+)?)D)?'
    r'(?:T'
    r'(?:(?P<hours>\d+(.\d+)?)H)?'
    r'(?:(?P<minutes>\d+(.\d+)?)M)?'
    r'(?:(?P<seconds>\d+(.\d+)?)S)?'
    r')?'
    r'$'
)

# Support PostgreSQL's day-time interval format, e.g. "3 days 04:05:06". The
# year-month and mixed intervals cannot be converted to a timedelta and thus
# aren't accepted.
postgres_interval_re = _lazy_re_compile(
    r'^'
    r'(?:(?P<days>-?\d+) (days? ?))?'
    r'(?:(?P<sign>[-+])?'
    r'(?P<hours>\d+):'
    r'(?P<minutes>\d\d):'
    r'(?P<seconds>\d\d)'
    r'(?:\.(?P<microseconds>\d{1,6}))?'
    r')?$'
)

def parse_date(value):
    """Parse a string and return a datetime.date.

Raise ValueError if the input is well formatted but not a valid date.
    Return None if the input isn't well formatted.
    """
    match = date_re.match(value)
    if match:
        kw = {k: int(v) for k, v in match.groupdict().items()}
        return datetime.date(**kw)

def parse_time(value):
    """Parse a string and return a datetime.time.

This function doesn't support time zone offsets.

Raise ValueError if the input is well formatted but not a valid time.
    Return None if the input isn't well formatted, in particular if it
    contains an offset.
    """
    match = time_re.match(value)
    if match:
        kw = match.groupdict()
        kw['microsecond'] = kw['microsecond'] and kw['microsecond'].ljust(6, '0')
        kw = {k: int(v) for k, v in kw.items() if v is not None}
        return datetime.time(**kw)

def parse_datetime(value):
    """Parse a string and return a datetime.datetime.

This function supports time zone offsets. When the input contains one,
    the output uses a timezone with a fixed offset from UTC.

Raise ValueError if the input is well formatted but not a valid datetime.
    Return None if the input isn't well formatted.
    """
    match = datetime_re.match(value)
    if match:
        kw = match.groupdict()
        kw['microsecond'] = kw['microsecond'] and kw['microsecond'].ljust(6, '0')
        tzinfo = kw.pop('tzinfo')
        if tzinfo == 'Z':
            tzinfo = utc
        elif tzinfo is not None:
            offset_mins = int(tzinfo[-2:]) if len(tzinfo) > 3 else 0
            offset = 60 * int(tzinfo[1:3]) + offset_mins
            if tzinfo[0] == '-':
                offset = -offset
            tzinfo = get_fixed_timezone(offset)
        kw = {k: int(v) for k, v in kw.items() if v is not None}
        kw['tzinfo'] = tzinfo
        return datetime.datetime(**kw)

def parse_duration(value):
    """Parse a duration string and return a datetime.timedelta.

The preferred format for durations in Django is '%d %H:%M:%S.%f'.

Also supports ISO 8601 representation and PostgreSQL's day-time interval
    format.
    """
    match = (
        standard_duration_re.match(value) or
        iso8601_duration_re.match(value) or
        postgres_interval_re.match(value)
    )
    if match:
        kw = match.groupdict()
        sign = -1 if kw.pop('sign', '+') == '-' else 1
        if kw.get('microseconds'):
            kw['microseconds'] = kw['microseconds'].ljust(6, '0')
        if kw.get('seconds') and kw.get('microseconds') and kw['seconds'].startswith('-'):
            kw['microseconds'] = '-' + kw['microseconds']
        kw = {k: float(v.replace(',', '.')) for k, v in kw.items() if v is not None}
        days = datetime.timedelta(kw.pop('days', .0) or .0)
        if match.re == iso8601_duration_re:
            days *= sign
        return days + sign * datetime.timedelta(**kw)

${this.title}

Code Editor : dateparse.py