def parse_date(text, tzinfo=None, hint='date'):
tzinfo = tzinfo or localtz
dt = None
text = text.strip()
# normalize ISO time
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds = [x or '00' for x in g[3:6]]
z, tzsign, tzhours, tzminutes = g[6:10]
if z:
tz = timedelta(hours=int(tzhours or '0'),
minutes=int(tzminutes or '0')).seconds / 60
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(tzsign == '-' and -tz or tz,
'%s%s:%s' %
(tzsign, tzhours, tzminutes))
tm = time.strptime('%s ' * 6 % (years, months, days,
hours, minutes, seconds),
'%Y %m %d %H %M %S ')
dt = tzinfo.localize(datetime(*tm[0:6]))
except ValueError:
pass
if dt is None:
for format in ['%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c',
'%b %d, %Y']:
try:
tm = time.strptime(text, format)
dt = tzinfo.localize(datetime(*tm[0:6]))
break
except ValueError:
continue
if dt is None:
dt = _parse_relative_time(text, tzinfo)
if dt is None:
hint = {'datetime': get_datetime_format_hint,
'date': get_date_format_hint}.get(hint, lambda: hint)()
raise TracError(_('"%(date)s" is an invalid date, or the date format '
'is not known. Try "%(hint)s" instead.',
date=text, hint=hint), _('Invalid Date'))
# Make sure we can convert it to a timestamp and back - fromtimestamp()
# may raise ValueError if larger than platform C localtime() or gmtime()
try:
to_datetime(to_timestamp(dt), tzinfo)
except ValueError:
raise TracError(_('The date "%(date)s" is outside valid range. '
'Try a date closer to present time.', date=text),
_('Invalid Date'))
return dt
def _parse_date_iso8601(text, tzinfo):
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds = [x or '00' for x in g[3:6]]
z, tzsign, tzhours, tzminutes = g[6:10]
if z:
tz = timedelta(hours=int(tzhours or '0'),
minutes=int(tzminutes or '0')).seconds / 60
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(
-tz if tzsign == '-' else tz,
'%s%s:%s' % (tzsign, tzhours, tzminutes))
tm = time.strptime(
'%s ' * 6 % (years, months, days, hours, minutes, seconds),
'%Y %m %d %H %M %S ')
t = tzinfo.localize(datetime(*tm[0:6]))
return tzinfo.normalize(t)
except ValueError:
pass
return None
def _parse_relative_time(text, tzinfo):
now = tzinfo.localize(datetime.now())
if text == 'now':
return now
if text == 'today':
return now.replace(microsecond=0, second=0, minute=0, hour=0)
if text == 'yesterday':
return now.replace(microsecond=0, second=0, minute=0, hour=0) \
- timedelta(days=1)
match = _REL_TIME_RE.match(text)
if match:
(value, interval) = match.groups()
return now - _time_intervals[interval](float(value))
match = _TIME_START_RE.match(text)
if match:
(which, start) = match.groups()
dt = _time_starts[start](now)
if which == 'last':
if start == 'month':
if dt.month > 1:
dt = dt.replace(month=dt.month - 1)
else:
dt = dt.replace(year=dt.year - 1, month=12)
else:
dt -= _time_intervals[start](1)
return dt
return None
def from_ical(ical, timezone=None):
""" Parses the data format from ical text format.
"""
tzinfo = None
if timezone:
try:
tzinfo = pytz.timezone(timezone)
except pytz.UnknownTimeZoneError:
pass
try:
timetuple = map(
int,
((
ical[:4], # year
ical[4:6], # month
ical[6:8], # day
ical[9:11], # hour
ical[11:13], # minute
ical[13:15], # second
)))
if tzinfo:
return tzinfo.localize(datetime(*timetuple))
elif not ical[15:]:
return datetime(*timetuple)
elif ical[15:16] == 'Z':
return datetime(tzinfo=pytz.utc, *timetuple)
else:
raise ValueError, ical
except:
raise ValueError, 'Wrong datetime format: %s' % ical
def from_ical(ical, timezone=None):
tzinfo = None
if timezone:
try:
tzinfo = pytz.timezone(timezone)
except pytz.UnknownTimeZoneError:
pass
try:
timetuple = (
int(ical[:4]), # year
int(ical[4:6]), # month
int(ical[6:8]), # day
int(ical[9:11]), # hour
int(ical[11:13]), # minute
int(ical[13:15]), # second
)
if tzinfo:
return tzinfo.localize(datetime(*timetuple))
elif not ical[15:]:
return datetime(*timetuple)
elif ical[15:16] == 'Z':
return datetime(tzinfo=pytz.utc, *timetuple)
else:
raise ValueError(ical)
except:
raise ValueError('Wrong datetime format: %s' % ical)
def from_ical(ical, timezone=None):
""" Parses the data format from ical text format.
"""
tzinfo = None
if timezone:
try:
tzinfo = pytz.timezone(timezone)
except pytz.UnknownTimeZoneError:
pass
try:
timetuple = map(int, ((
ical[:4], # year
ical[4:6], # month
ical[6:8], # day
ical[9:11], # hour
ical[11:13], # minute
ical[13:15], # second
)))
if tzinfo:
return tzinfo.localize(datetime(*timetuple))
elif not ical[15:]:
return datetime(*timetuple)
elif ical[15:16] == 'Z':
return datetime(tzinfo=pytz.utc, *timetuple)
else:
raise ValueError, ical
except:
raise ValueError, 'Wrong datetime format: %s' % ical
def _parse_date_iso8601(text, tzinfo):
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds, useconds = [x or '00' for x in g[3:7]]
useconds = (useconds + '000000')[:6]
z = g[7]
if z:
tzsign = g[8]
tzhours = int(g[9] or 0)
tzminutes = int(g[10] or 0)
if not (0 <= tzhours < 24 and 0 <= tzminutes < 60):
return None
tz = tzhours * 60 + tzminutes
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(
-tz if tzsign == '-' else tz,
'%s%02d:%02d' % (tzsign, tzhours, tzminutes))
tm = [
int(x) for x in (years, months, days, hours, minutes, seconds,
useconds)
]
t = tzinfo.localize(datetime(*tm))
return tzinfo.normalize(t)
except (ValueError, OverflowError):
pass
return None
def _parse_relative_time(text, tzinfo):
now = tzinfo.localize(datetime.now())
if text == 'now':
return now
if text == 'today':
return now.replace(microsecond=0, second=0, minute=0, hour=0)
if text == 'yesterday':
return now.replace(microsecond=0, second=0, minute=0, hour=0) \
- timedelta(days=1)
match = _REL_TIME_RE.match(text)
if match:
(value, interval) = match.groups()
return now - _time_intervals[interval](float(value))
match = _TIME_START_RE.match(text)
if match:
(which, start) = match.groups()
dt = _time_starts[start](now)
if which == 'last':
if start == 'month':
if dt.month > 1:
dt = dt.replace(month=dt.month - 1)
else:
dt = dt.replace(year=dt.year - 1, month=12)
else:
dt -= _time_intervals[start](1)
return dt
return None
def parse(time_str, tz='America/New_York', now=None):
"""
Convert a string that could be either number of seconds since
epoch (unixtime) or a formatted string to a datetime.
@param time_str: str|datetime|None
@param now: datetime|None, uses current time by default
@return datetime
"""
if not time_str or isinstance(time_str, datetime):
return time_str
dt = _as_datetime(time_str) or _as_timedelta(time_str, now)
if dt is None:
raise ValueError("unable to convert '%s' to datetime" % time_str)
if tz:
try:
tzinfo = convert_tzinfo(tz)
if dt.tzinfo:
localize(dt, tz=tz, normalize=True)
else:
dt = tzinfo.localize(dt)
except pytz.exceptions.UnknownTimeZoneError:
raise ValueError("unknown timezone '%s'" % tz)
dt = pytz.timezone('America/New_York').normalize(dt)
return dt
def from_ical(ical, timezone=None):
tzinfo = None
if timezone:
try:
tzinfo = pytz.timezone(timezone)
except pytz.UnknownTimeZoneError:
tzinfo = _timezone_cache.get(timezone, None)
try:
timetuple = (
int(ical[:4]), # year
int(ical[4:6]), # month
int(ical[6:8]), # day
int(ical[9:11]), # hour
int(ical[11:13]), # minute
int(ical[13:15]), # second
)
if tzinfo:
return tzinfo.localize(datetime(*timetuple))
elif not ical[15:]:
return datetime(*timetuple)
elif ical[15:16] == 'Z':
return pytz.utc.localize(datetime(*timetuple))
else:
raise ValueError(ical)
except:
raise ValueError('Wrong datetime format: %s' % ical)
def _parse_date_iso8601(text, tzinfo):
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds = [x or '00' for x in g[3:6]]
z, tzsign, tzhours, tzminutes = g[6:10]
if z:
tz = timedelta(hours=int(tzhours or '0'),
minutes=int(tzminutes or '0')).seconds / 60
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(-tz if tzsign == '-' else tz,
'%s%s:%s' %
(tzsign, tzhours, tzminutes))
tm = time.strptime('%s ' * 6 % (years, months, days,
hours, minutes, seconds),
'%Y %m %d %H %M %S ')
t = tzinfo.localize(datetime(*tm[0:6]))
return tzinfo.normalize(t)
except ValueError:
pass
return None
def _parse_date_iso8601(text, tzinfo):
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds, useconds = [x or '00' for x in g[3:7]]
useconds = (useconds + '000000')[:6]
z, tzsign, tzhours, tzminutes = g[7:11]
if z:
tz = timedelta(hours=int(tzhours or '0'),
minutes=int(tzminutes or '0')).seconds / 60
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(-tz if tzsign == '-' else tz,
'%s%s:%s' %
(tzsign, tzhours, tzminutes))
tm = [int(x) for x in (years, months, days,
hours, minutes, seconds, useconds)]
t = tzinfo.localize(datetime(*tm))
return tzinfo.normalize(t)
except ValueError:
pass
return None
def _parse_date_iso8601(text, tzinfo):
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds, useconds = [x or '00' for x in g[3:7]]
useconds = (useconds + '000000')[:6]
z, tzsign, tzhours, tzminutes = g[7:11]
if z:
tz = timedelta(hours=int(tzhours or '0'),
minutes=int(tzminutes or '0')).seconds / 60
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(-tz if tzsign == '-' else tz,
'%s%s:%s' %
(tzsign, tzhours, tzminutes))
tm = [int(x) for x in (years, months, days,
hours, minutes, seconds, useconds)]
t = tzinfo.localize(datetime(*tm))
return tzinfo.normalize(t)
except ValueError:
pass
return None
def parse(time_str, tz='America/New_York', now=None):
"""
Convert a string that could be either number of seconds since
epoch (unixtime) or a formatted string to a datetime.
@param time_str: str|datetime|None
@param now: datetime|None, uses current time by default
@return datetime
"""
if not time_str or isinstance(time_str, datetime):
return time_str
dt = _as_datetime(time_str) or _as_timedelta(time_str, now)
if dt is None:
raise ValueError("unable to convert '%s' to datetime" % time_str)
if tz:
try:
tzinfo = convert_tzinfo(tz)
if dt.tzinfo:
localize(dt, tz=tz, normalize=True)
else:
dt = tzinfo.localize(dt)
except pytz.exceptions.UnknownTimeZoneError:
raise ValueError("unknown timezone '%s'" % tz)
dt = pytz.timezone('America/New_York').normalize(dt)
return dt
def _parse_relative_time(text, tzinfo, now=None):
if now is None: # now argument for unit tests
now = datetime_now(tzinfo)
if text == 'now':
return now
dt = None
if text == 'today':
dt = _time_starts['day'](now)
elif text == 'yesterday':
dt = _time_starts['day'](now) - timedelta(days=1)
elif text == 'tomorrow':
dt = _time_starts['day'](now) + timedelta(days=1)
if dt is None:
match = _REL_FUTURE_RE.match(text)
if match:
(value, interval) = match.groups()
dt = now + _time_intervals[interval](float(value))
if dt is None:
match = _REL_PAST_RE.match(text)
if match:
(value, interval) = match.groups()
dt = now - _time_intervals[interval](float(value))
if dt is None:
match = _TIME_START_RE.match(text)
if match:
(which, start) = match.groups()
dt = _time_starts[start](now)
if which == 'last':
if start == 'month':
if dt.month > 1:
dt = dt.replace(month=dt.month - 1)
else:
dt = dt.replace(year=dt.year - 1, month=12)
elif start == 'year':
dt = dt.replace(year=dt.year - 1)
else:
dt -= _time_intervals[start](1)
elif which == 'next':
if start == 'month':
if dt.month < 12:
dt = dt.replace(month=dt.month + 1)
else:
dt = dt.replace(year=dt.year + 1, month=1)
elif start == 'year':
dt = dt.replace(year=dt.year + 1)
else:
dt += _time_intervals[start](1)
if dt is None:
return None
if not dt.tzinfo:
dt = tzinfo.localize(dt)
return tzinfo.normalize(dt)
def _parse_relative_time(text, tzinfo, now=None):
if now is None: # now argument for unit tests
now = datetime.now(tzinfo)
if text == 'now':
return now
dt = None
if text == 'today':
dt = _time_starts['day'](now)
elif text == 'yesterday':
dt = _time_starts['day'](now) - timedelta(days=1)
elif text == 'tomorrow':
dt = _time_starts['day'](now) + timedelta(days=1)
if dt is None:
match = _REL_FUTURE_RE.match(text)
if match:
(value, interval) = match.groups()
dt = now + _time_intervals[interval](float(value))
if dt is None:
match = _REL_PAST_RE.match(text)
if match:
(value, interval) = match.groups()
dt = now - _time_intervals[interval](float(value))
if dt is None:
match = _TIME_START_RE.match(text)
if match:
(which, start) = match.groups()
dt = _time_starts[start](now)
if which == 'last':
if start == 'month':
if dt.month > 1:
dt = dt.replace(month=dt.month - 1)
else:
dt = dt.replace(year=dt.year - 1, month=12)
elif start == 'year':
dt = dt.replace(year=dt.year - 1)
else:
dt -= _time_intervals[start](1)
elif which == 'next':
if start == 'month':
if dt.month < 12:
dt = dt.replace(month=dt.month + 1)
else:
dt = dt.replace(year=dt.year + 1, month=1)
elif start == 'year':
dt = dt.replace(year=dt.year + 1)
else:
dt += _time_intervals[start](1)
if dt is None:
return None
if not dt.tzinfo:
dt = tzinfo.localize(dt)
return tzinfo.normalize(dt)
def _i18n_parse_date_0(text, order, regexp, period_names, month_names, tzinfo):
matches = regexp.findall(text)
if not matches:
return None
# remove am/pm markers on ahead
period = None
for idx, match in enumerate(matches):
period = period_names.get(match)
if period is not None:
del matches[idx]
break
# for date+time, use 0 seconds if seconds are missing
if 's' in order and len(matches) == 5:
matches.insert(order['s'], 0)
values = {}
for key, idx in order.iteritems():
if idx < len(matches):
value = matches[idx]
if key == 'y':
if len(value) == 2 and value.isdigit():
value = '20' + value
values[key] = value
if 'y' not in values or 'M' not in values or 'd' not in values:
raise ValueError
for key in ('y', 'M', 'd'):
value = values[key]
value = month_names.get(value)
if value is not None:
if key == 'M':
values[key] = value
else:
values[key], values['M'] = values['M'], value
break
values = {key: int(value) for key, value in values.iteritems()}
values.setdefault('h', 0)
values.setdefault('m', 0)
values.setdefault('s', 0)
if period and values['h'] <= 12:
if period == 'am':
values['h'] %= 12
elif period == 'pm':
values['h'] = values['h'] % 12 + 12
t = tzinfo.localize(datetime(*(values[k] for k in 'yMdhms')))
return tzinfo.normalize(t)
def _i18n_parse_date_0(text, order, regexp, period_names, month_names, tzinfo):
matches = regexp.findall(text)
if not matches:
return None
period = None
for idx, match in enumerate(matches):
period = period_names.get(match)
if period is not None:
del matches[idx]
break
if len(matches) == 5:
matches.insert(order['s'], 0)
values = {}
for key, idx in order.iteritems():
if idx < len(matches):
value = matches[idx]
if key == 'y':
if len(value) == 2 and value.isdigit():
value = '20' + value
values[key] = value
if 'y' not in values or 'M' not in values or 'd' not in values:
raise ValueError
for key in ('y', 'M', 'd'):
value = values[key]
value = month_names.get(value)
if value is not None:
if key == 'M':
values[key] = value
else:
values[key], values['M'] = values['M'], value
break
values = dict((key, int(value)) for key, value in values.iteritems())
values.setdefault('h', 0)
values.setdefault('m', 0)
values.setdefault('s', 0)
if period and values['h'] <= 12:
if period == 'am':
values['h'] %= 12
elif period == 'pm':
values['h'] = values['h'] % 12 + 12
t = tzinfo.localize(datetime(*(values[k] for k in 'yMdhms')))
if hasattr(tzinfo, 'normalize'): # pytz
t = tzinfo.normalize(t)
return t
def _i18n_parse_date_0(text, order, regexp, period_names, month_names, tzinfo):
matches = regexp.findall(text)
if not matches:
return None
# remove am/pm markers on ahead
period = None
for idx, match in enumerate(matches):
period = period_names.get(match)
if period is not None:
del matches[idx]
break
# for date+time, use 0 seconds if seconds are missing
if 's' in order and len(matches) == 5:
matches.insert(order['s'], 0)
values = {}
for key, idx in order.iteritems():
if idx < len(matches):
value = matches[idx]
if key == 'y':
if len(value) == 2 and value.isdigit():
value = '20' + value
values[key] = value
if 'y' not in values or 'M' not in values or 'd' not in values:
raise ValueError
for key in ('y', 'M', 'd'):
value = values[key]
value = month_names.get(value)
if value is not None:
if key == 'M':
values[key] = value
else:
values[key], values['M'] = values['M'], value
break
values = dict((key, int(value)) for key, value in values.iteritems())
values.setdefault('h', 0)
values.setdefault('m', 0)
values.setdefault('s', 0)
if period and values['h'] <= 12:
if period == 'am':
values['h'] %= 12
elif period == 'pm':
values['h'] = values['h'] % 12 + 12
t = tzinfo.localize(datetime(*(values[k] for k in 'yMdhms')))
return tzinfo.normalize(t)
def _libc_parse_date(text, tzinfo):
for format in ('%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c',
'%b %d, %Y'):
try:
tm = time.strptime(text, format)
dt = tzinfo.localize(datetime(*tm[0:6]))
return tzinfo.normalize(dt)
except (ValueError, OverflowError):
continue
try:
return _i18n_parse_date(text, tzinfo, None)
except (ValueError, OverflowError):
pass
return
def _libc_parse_date(text, tzinfo):
for format in ('%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c',
'%b %d, %Y'):
try:
tm = time.strptime(text, format)
dt = tzinfo.localize(datetime(*tm[0:6]))
return tzinfo.normalize(dt)
except ValueError:
continue
try:
return _i18n_parse_date(text, tzinfo, None)
except ValueError:
pass
return
def parse_time(value, tzinfo):
"""Parse Twitter API time format.
>>> parse_time("Sun Dec 14 11:29:30 +0000 2008", StaticTzInfo(0))
datetime(2008, 12, 14, 11, 29, 30)
>>> parse_time("Sun Dec 14 11:29:30 +0000 2008", StaticTzInfo(8))
datetime(2008, 12, 22, 11, 29, 30)
"""
if not value:
return None
day, month, date, time, timezone, year = value.lower().split()
hour, min, sec = time.split(u":")
utc_dt = datetime(int(year), int(MONTHS[month]), int(date), int(hour),
int(min), int(sec))
return tzinfo.localize(utc_dt)
def replace_tzinfo(cls, dt: datetime, tzinfo: tzinfo, is_dst=True):
"""
This method does not convert timezone, it simply set the timezone to specified timezone.
:param date_time: if this datetime has tzinfo, it will be overridden
:param tzinfo: timezone
:rtype: datetime
"""
# datetime.replace(tzinfo=user_tz) => sometime this change the datetime value
# http://stackoverflow.com/questions/27531718/datetime-timezone-conversion-using-pytz
# use localize instead
if dt.tzinfo is not None:
dt = dt.replace(tzinfo=None)
local = tzinfo.localize(dt, is_dst=is_dst)
return tzinfo.normalize(local)
def parse_date(text, tzinfo=None, locale=None, hint='date'):
tzinfo = tzinfo or localtz
text = text.strip()
dt = _parse_date_iso8601(text, tzinfo)
if dt is None and locale != 'iso8601':
if babel and locale:
dt = _i18n_parse_date(text, tzinfo, locale)
else:
for format in [
'%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c',
'%b %d, %Y'
]:
try:
tm = time.strptime(text, format)
dt = tzinfo.localize(datetime(*tm[0:6]))
if hasattr(tzinfo, 'normalize'): # pytz
dt = tzinfo.normalize(dt)
break
except ValueError:
continue
if dt is None:
dt = _parse_relative_time(text, tzinfo)
if dt is None:
hint = {
'datetime': get_datetime_format_hint,
'date': get_date_format_hint
}.get(hint, lambda (l): hint)(locale)
raise TracError(
_(
'"%(date)s" is an invalid date, or the date format '
'is not known. Try "%(hint)s" instead.',
date=text,
hint=hint), _('Invalid Date'))
# Make sure we can convert it to a timestamp and back - fromtimestamp()
# may raise ValueError if larger than platform C localtime() or gmtime()
try:
to_datetime(to_timestamp(dt), tzinfo)
except ValueError:
raise TracError(
_(
'The date "%(date)s" is outside valid range. '
'Try a date closer to present time.',
date=text), _('Invalid Date'))
return dt
def parse_date(text, tzinfo=None, locale=None, hint='date'):
tzinfo = tzinfo or localtz
text = text.strip()
dt = _parse_date_iso8601(text, tzinfo)
if dt is None and locale != 'iso8601':
if babel and locale:
dt = _i18n_parse_date(text, tzinfo, locale)
else:
for format in ['%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c',
'%b %d, %Y']:
try:
tm = time.strptime(text, format)
dt = tzinfo.localize(datetime(*tm[0:6]))
dt = tzinfo.normalize(dt)
break
except ValueError:
continue
if dt is None:
dt = _parse_relative_time(text, tzinfo)
if dt is None:
hint = {'datetime': get_datetime_format_hint,
'date': get_date_format_hint,
'relative': get_datetime_format_hint
}.get(hint, lambda(l): hint)(locale)
raise TracError(_('"%(date)s" is an invalid date, or the date format '
'is not known. Try "%(hint)s" instead.',
date=text, hint=hint), _('Invalid Date'))
# Make sure we can convert it to a timestamp and back - fromtimestamp()
# may raise ValueError if larger than platform C localtime() or gmtime()
try:
datetime.utcfromtimestamp(to_timestamp(dt))
except ValueError:
raise TracError(_('The date "%(date)s" is outside valid range. '
'Try a date closer to present time.', date=text),
_('Invalid Date'))
return dt
def parse_date(text, tzinfo=None, hint='date'):
tzinfo = tzinfo or localtz
dt = None
text = text.strip()
# normalize ISO time
match = _ISO_8601_RE.match(text)
if match:
try:
g = match.groups()
years = g[0]
months = g[1] or '01'
days = g[2] or '01'
hours, minutes, seconds = [x or '00' for x in g[3:6]]
z, tzsign, tzhours, tzminutes = g[6:10]
if z:
tz = timedelta(hours=int(tzhours or '0'),
minutes=int(tzminutes or '0')).seconds / 60
if tz == 0:
tzinfo = utc
else:
tzinfo = FixedOffset(
tzsign == '-' and -tz or tz,
'%s%s:%s' % (tzsign, tzhours, tzminutes))
tm = time.strptime(
'%s ' * 6 % (years, months, days, hours, minutes, seconds),
'%Y %m %d %H %M %S ')
dt = tzinfo.localize(datetime(*tm[0:6]))
except ValueError:
pass
if dt is None:
for format in [
'%x %X', '%x, %X', '%X %x', '%X, %x', '%x', '%c', '%b %d, %Y'
]:
try:
tm = time.strptime(text, format)
dt = tzinfo.localize(datetime(*tm[0:6]))
break
except ValueError:
continue
if dt is None:
dt = _parse_relative_time(text, tzinfo)
if dt is None:
hint = {
'datetime': get_datetime_format_hint,
'date': get_date_format_hint
}.get(hint, lambda: hint)()
raise TracError(
_(
'"%(date)s" is an invalid date, or the date format '
'is not known. Try "%(hint)s" instead.',
date=text,
hint=hint), _('Invalid Date'))
# Make sure we can convert it to a timestamp and back - fromtimestamp()
# may raise ValueError if larger than platform C localtime() or gmtime()
try:
to_datetime(to_timestamp(dt), tzinfo)
except ValueError:
raise TracError(
_(
'The date "%(date)s" is outside valid range. '
'Try a date closer to present time.',
date=text), _('Invalid Date'))
return dt
def localize(dt, tzinfo):
if hasattr(tzinfo, 'localize'):
return tzinfo.localize(dt)
return normalize(dt.replace(tzinfo=tzinfo))