def _coerce_cycletime(value, keys, _):
"""Coerce value to a cycle point."""
if not value:
return None
value = _strip_and_unquote(keys, value)
if value == "now":
# Handle this later in config.py when the suite UTC mode is known.
return value
if re.match(r"\d+$", value):
# Could be an old date-time cycle point format, or integer format.
return value
if value.startswith("-") or value.startswith("+"):
# We don't know the value given for num expanded year digits...
for i in range(1, 101):
parser = TimePointParser(num_expanded_year_digits=i)
try:
parser.parse(value)
except ValueError:
continue
return value
raise IllegalValueError("cycle point", keys, value)
parser = TimePointParser()
try:
parser.parse(value)
except ValueError:
raise IllegalValueError("cycle point", keys, value)
return value
def _coerce_cycletime( value, keys, args ):
"""Coerce value to a cycle point."""
value = _strip_and_unquote( keys, value )
if re.match(r"\d+$", value):
# Could be an old date-time cycle point format, or integer format.
return value
if value.startswith("-") or value.startswith("+"):
# We don't know the value given for num expanded year digits...
for i in range(1, 101):
parser = TimePointParser(num_expanded_year_digits=i)
try:
parser.parse(value)
except ValueError:
continue
return value
raise IllegalValueError("cycle point", keys, value)
parser = TimePointParser()
try:
parser.parse(value)
except ValueError:
raise IllegalValueError("cycle point", keys, value)
set_syntax_version(VERSION_NEW,
"cycle point: %s" % itemstr(
keys[:-1], keys[-1], value))
return value
def _coerce_cycletime(value, keys, _):
"""Coerce value to a cycle point."""
if not value:
return None
value = _strip_and_unquote(keys, value)
if value == "now":
# Handle this later in config.py when the suite UTC mode is known.
return value
if re.match(r"\d+$", value):
# Could be an old date-time cycle point format, or integer format.
return value
if value.startswith("-") or value.startswith("+"):
# We don't know the value given for num expanded year digits...
for i in range(1, 101):
parser = TimePointParser(num_expanded_year_digits=i)
try:
parser.parse(value)
except ValueError:
continue
return value
raise IllegalValueError("cycle point", keys, value)
parser = TimePointParser()
try:
parser.parse(value)
except ValueError:
raise IllegalValueError("cycle point", keys, value)
return value
def _coerce_cycletime_time_zone(value, keys, _):
"""Coerce value to a cycle point time zone format - Z, +13, -0800..."""
value = _strip_and_unquote(keys, value)
if not value:
return None
try:
set_syntax_version(VERSION_NEW,
"use of [cylc]cycle point time zone format")
except SyntaxVersionError:
raise IllegalValueError("cycle point time zone format", keys, value)
test_timepoint = TimePoint(year=2001,
month_of_year=3,
day_of_month=1,
hour_of_day=4,
minute_of_hour=30,
second_of_minute=54)
dumper = TimePointDumper()
test_timepoint_string = dumper.dump(test_timepoint, "CCYYMMDDThhmmss")
test_timepoint_string += value
parser = TimePointParser(allow_only_basic=True)
try:
parser.parse(test_timepoint_string)
except ValueError:
raise IllegalValueError("cycle point time zone format", keys, value)
return value
def _coerce_cycletime_time_zone(value, keys, _):
"""Coerce value to a cycle point time zone format - Z, +13, -0800..."""
value = _strip_and_unquote(keys, value)
if not value:
return None
test_timepoint = TimePoint(year=2001, month_of_year=3, day_of_month=1,
hour_of_day=4, minute_of_hour=30,
second_of_minute=54)
dumper = TimePointDumper()
test_timepoint_string = dumper.dump(test_timepoint, "CCYYMMDDThhmmss")
test_timepoint_string += value
parser = TimePointParser(allow_only_basic=True)
try:
parser.parse(test_timepoint_string)
except ValueError:
raise IllegalValueError("cycle point time zone format", keys, value)
return value
def coerce_cycle_point_time_zone(cls, value, keys):
"""Coerce value to a cycle point time zone format - Z, +13, -0800..."""
value = cls.strip_and_unquote(keys, value)
if not value:
return None
test_timepoint = TimePoint(year=2001, month_of_year=3, day_of_month=1,
hour_of_day=4, minute_of_hour=30,
second_of_minute=54)
dumper = TimePointDumper()
test_timepoint_string = dumper.dump(test_timepoint, 'CCYYMMDDThhmmss')
test_timepoint_string += value
parser = TimePointParser(allow_only_basic=True)
try:
parser.parse(test_timepoint_string)
except ValueError:
raise IllegalValueError(
'cycle point time zone format', keys, value)
return value
def test_invalid_components():
parser = TimePointParser()
for date, invalid in {
'2000-01-01T00:00:60': ['second_of_minute=60'],
'2000-01-01T00:60:00': ['minute_of_hour=60'],
'2000-01-01T60:00:00': ['hour_of_day=60'],
'2000-01-32T00:00:00': ['day_of_month=32'],
'2000-13-00T00:00:00': ['month_of_year=13'],
'2000-13-32T60:60:60': ['month_of_year=13',
'day_of_month=32',
'hour_of_day=60',
'minute_of_hour=60',
'second_of_minute=60']
}.items():
with pytest.raises(ValueError) as exc:
parser.parse(date)
for item in invalid:
assert item in str(exc)
def _coerce_cycletime_time_zone( value, keys, args ):
"""Coerce value to a cycle point time zone format - Z, +13, -0800..."""
value = _strip_and_unquote( keys, value )
set_syntax_version(VERSION_NEW,
"use of [cylc]cycle point time zone format",
exc_class=IllegalValueError,
exc_args=("cycle point time zone format", keys, value))
test_timepoint = TimePoint(year=2001, month_of_year=3, day_of_month=1,
hour_of_day=4, minute_of_hour=30,
second_of_minute=54)
dumper = TimePointDumper()
test_timepoint_string = dumper.dump(test_timepoint, "CCYYMMDDThhmmss")
test_timepoint_string += value
parser = TimePointParser(allow_only_basic=True)
try:
parser.parse(test_timepoint_string)
except ValueError:
raise IllegalValueError("cycle point time zone format", keys, value)
return value
def _coerce_cycletime(value, keys, args):
"""Coerce value to a cycle point."""
value = _strip_and_unquote(keys, value)
if re.match(r"\d+$", value):
# Could be an old date-time cycle point format, or integer format.
return value
if value.startswith("-") or value.startswith("+"):
# We don't know the value given for num expanded year digits...
for i in range(1, 101):
parser = TimePointParser(num_expanded_year_digits=i)
try:
parser.parse(value)
except ValueError:
continue
return value
raise IllegalValueError("cycle point", keys, value)
parser = TimePointParser()
try:
parser.parse(value)
except ValueError:
raise IllegalValueError("cycle point", keys, value)
set_syntax_version(VERSION_NEW,
"cycle point: %s" % itemstr(keys[:-1], keys[-1], value))
return value
def suite_state(suite,
task,
point,
offset=None,
status='succeeded',
message=None,
cylc_run_dir=None,
debug=False):
"""Connect to a suite DB and query the requested task state.
Reports satisfied only if the remote suite state has been achieved.
Returns all suite state args to pass on to triggering tasks.
"""
cylc_run_dir = os.path.expandvars(
os.path.expanduser(cylc_run_dir
or glbl_cfg().get_host_item('run directory')))
if offset is not None:
point = str(add_offset(point, offset))
try:
checker = CylcSuiteDBChecker(cylc_run_dir, suite)
except (OSError, sqlite3.Error):
# Failed to connect to DB; target suite may not be started.
return (False, None)
fmt = checker.get_remote_point_format()
if fmt:
my_parser = TimePointParser()
point = str(my_parser.parse(point, dump_format=fmt))
if message is not None:
satisfied = checker.task_state_met(task, point, message=message)
else:
satisfied = checker.task_state_met(task, point, status=status)
results = {
'suite': suite,
'task': task,
'point': point,
'offset': offset,
'status': status,
'message': message,
'cylc_run_dir': cylc_run_dir
}
return (satisfied, results)
def add_offset(cycle_point, offset):
"""Add a (positive or negative) offset to a cycle point.
Return the result.
"""
my_parser = TimePointParser()
my_target_point = my_parser.parse(cycle_point, dump_as_parsed=True)
my_offset_parser = DurationParser()
oper = "+"
if offset.startswith("-") or offset.startswith("+"):
oper = offset[0]
offset = offset[1:]
if offset.startswith("P"):
my_shift = my_offset_parser.parse(offset)
if oper == "-":
my_target_point -= my_shift
else:
my_target_point += my_shift
else:
raise ValueError("ERROR, bad offset format: %s" % offset)
return my_target_point
def suite_state(suite, task, point, offset=None, status='succeeded',
message=None, cylc_run_dir=None, debug=False):
"""Connect to a suite DB and query the requested task state.
Reports satisfied only if the remote suite state has been achieved.
Returns all suite state args to pass on to triggering tasks.
"""
cylc_run_dir = os.path.expandvars(
os.path.expanduser(
cylc_run_dir or glbl_cfg().get_host_item('run directory')))
if offset is not None:
point = str(add_offset(point, offset))
try:
checker = CylcSuiteDBChecker(cylc_run_dir, suite)
except (OSError, sqlite3.Error):
# Failed to connect to DB; target suite may not be started.
return (False, None)
fmt = checker.get_remote_point_format()
if fmt:
my_parser = TimePointParser()
point = str(my_parser.parse(point, dump_format=fmt))
if message is not None:
satisfied = checker.task_state_met(task, point, message=message)
else:
satisfied = checker.task_state_met(task, point, status=status)
results = {
'suite': suite,
'task': task,
'point': point,
'offset': offset,
'status': status,
'message': message,
'cylc_run_dir': cylc_run_dir
}
return (satisfied, results)
def get_unix_time_from_time_string(time_string):
"""Convert a time string into a unix timestemp."""
parser = TimePointParser()
time_point = parser.parse(time_string)
return time_point.get("seconds_since_unix_epoch")
def get_unix_time_from_time_string(time_string):
"""Convert a time string into a unix timestemp."""
parser = TimePointParser()
time_point = parser.parse(time_string)
return time_point.get("seconds_since_unix_epoch")
class RoseDateTimeOperator(object):
"""A class to parse and print date string with an offset."""
CURRENT_TIME_DUMP_FORMAT = u"CCYY-MM-DDThh:mm:ss+hh:mm"
CURRENT_TIME_DUMP_FORMAT_Z = u"CCYY-MM-DDThh:mm:ssZ"
NEGATIVE = "-"
# strptime formats and their compatibility with the ISO 8601 parser.
PARSE_FORMATS = [
("%a %b %d %H:%M:%S %Y", True), # ctime
("%a %b %d %H:%M:%S %Z %Y", True), # Unix "date"
("%Y-%m-%dT%H:%M:%S", False), # ISO8601, extended
("%Y%m%dT%H%M%S", False), # ISO8601, basic
("%Y%m%d%H", False) # Cylc (current)
]
REC_OFFSET = re.compile(r"""\A[\+\-]?(?:\d+[wdhms])+\Z""", re.I)
REC_OFFSET_FIND = re.compile(r"""(?P<num>\d+)(?P<unit>[wdhms])""")
STR_NOW = "now"
STR_REF = "ref"
TASK_CYCLE_TIME_ENV = "ROSE_TASK_CYCLE_TIME"
UNITS = {
"w": "weeks",
"d": "days",
"h": "hours",
"m": "minutes",
"s": "seconds"
}
def __init__(self,
parse_format=None,
utc_mode=False,
calendar_mode=None,
ref_point_str=None):
"""Constructor.
parse_format -- If specified, parse with the specified format.
Otherwise, parse with one of the format strings in
self.PARSE_FORMATS. The format should be a string
compatible to strptime(3).
utc_mode -- If True, parse/print in UTC mode rather than local or
other timezones.
calendar_mode -- Set calendar mode, for isodatetime.data.Calendar.
ref_point_str -- Set the reference time point for operations.
If not specified, operations use current date time.
"""
self.parse_formats = self.PARSE_FORMATS
self.custom_parse_format = parse_format
self.utc_mode = utc_mode
if self.utc_mode:
assumed_time_zone = (0, 0)
else:
assumed_time_zone = None
self.set_calendar_mode(calendar_mode)
self.time_point_dumper = TimePointDumper()
self.time_point_parser = TimePointParser(
assumed_time_zone=assumed_time_zone)
self.duration_parser = DurationParser()
self.ref_point_str = ref_point_str
def date_format(self, print_format, time_point=None):
"""Reformat time_point according to print_format.
time_point -- The time point to format.
Otherwise, use ref date time.
"""
if time_point is None:
time_point = self.date_parse()[0]
if print_format is None:
return str(time_point)
if "%" in print_format:
try:
return time_point.strftime(print_format)
except ValueError:
return self.get_datetime_strftime(time_point, print_format)
return self.time_point_dumper.dump(time_point, print_format)
def date_parse(self, time_point_str=None):
"""Parse time_point_str.
Return (t, format) where t is a isodatetime.data.TimePoint object and
format is the format that matches time_point_str.
time_point_str -- The time point string to parse.
Otherwise, use ref time.
"""
if time_point_str is None or time_point_str == self.STR_REF:
time_point_str = self.ref_point_str
if time_point_str is None or time_point_str == self.STR_NOW:
time_point = get_timepoint_for_now()
time_point.set_time_zone_to_local()
if self.utc_mode or time_point.get_time_zone_utc(): # is in UTC
parse_format = self.CURRENT_TIME_DUMP_FORMAT_Z
else:
parse_format = self.CURRENT_TIME_DUMP_FORMAT
elif self.custom_parse_format is not None:
parse_format = self.custom_parse_format
time_point = self.strptime(time_point_str, parse_format)
else:
parse_formats = list(self.parse_formats)
time_point = None
while parse_formats:
parse_format, should_use_datetime = parse_formats.pop(0)
try:
if should_use_datetime:
time_point = self.get_datetime_strptime(
time_point_str, parse_format)
else:
time_point = self.time_point_parser.strptime(
time_point_str, parse_format)
break
except ValueError:
pass
if time_point is None:
time_point = self.time_point_parser.parse(time_point_str,
dump_as_parsed=True)
parse_format = time_point.dump_format
if self.utc_mode:
time_point.set_time_zone_to_utc()
return time_point, parse_format
def date_shift(self, time_point=None, offset=None):
"""Return a date string with an offset.
time_point -- A time point or time point string.
Otherwise, use current time.
offset -- If specified, it should be a string containing the offset
that has the format "[+/-]nU[nU...]" where "n" is an
integer, and U is a unit matching a key in self.UNITS.
"""
if time_point is None:
time_point = self.date_parse()[0]
# Offset
if offset:
sign = "+"
if offset.startswith("-") or offset.startswith("+"):
sign = offset[0]
offset = offset[1:]
if offset.startswith("P"):
# Parse and apply.
try:
duration = self.duration_parser.parse(offset)
except ValueError:
raise OffsetValueError(offset)
if sign == "-":
time_point -= duration
else:
time_point += duration
else:
# Backwards compatibility for e.g. "-1h"
if not self.is_offset(offset):
raise OffsetValueError(offset)
for num, unit in self.REC_OFFSET_FIND.findall(offset.lower()):
num = int(num)
if sign == "-":
num = -num
key = self.UNITS[unit]
time_point += Duration(**{key: num})
return time_point
def date_diff(self, time_point_1=None, time_point_2=None):
"""Return (duration, is_negative) between two TimePoint objects.
duration -- is a Duration instance.
is_negative -- is a RoseDateTimeOperator.NEGATIVE if time_point_2 is
in the past of time_point_1.
"""
if time_point_2 < time_point_1:
return (time_point_1 - time_point_2, self.NEGATIVE)
else:
return (time_point_2 - time_point_1, "")
@classmethod
def date_diff_format(cls, print_format, duration, sign):
"""Format a duration."""
if print_format:
delta_lookup = {
"y": duration.years,
"m": duration.months,
"d": duration.days,
"h": duration.hours,
"M": duration.minutes,
"s": duration.seconds
}
expression = ""
for item in print_format:
if item in delta_lookup:
if float(delta_lookup[item]).is_integer():
expression += str(int(delta_lookup[item]))
else:
expression += str(delta_lookup[item])
else:
expression += item
return sign + expression
else:
return sign + str(duration)
@staticmethod
def get_calendar_mode():
"""Get current calendar mode."""
return Calendar.default().mode
def is_offset(self, offset):
"""Return True if the string offset can be parsed as an offset."""
return (self.REC_OFFSET.match(offset) is not None)
@staticmethod
def set_calendar_mode(calendar_mode=None):
"""Set calendar mode for subsequent operations.
Raise KeyError if calendar_mode is invalid.
"""
if not calendar_mode:
calendar_mode = os.getenv("ROSE_CYCLING_MODE")
if calendar_mode and calendar_mode in Calendar.MODES:
Calendar.default().set_mode(calendar_mode)
def strftime(self, time_point, print_format):
"""Use either the isodatetime or datetime strftime time formatting."""
try:
return time_point.strftime(print_format)
except ValueError:
return self.get_datetime_strftime(time_point, print_format)
def strptime(self, time_point_str, parse_format):
"""Use either the isodatetime or datetime strptime time parsing."""
try:
return self.time_point_parser.strptime(time_point_str,
parse_format)
except ValueError:
return self.get_datetime_strptime(time_point_str, parse_format)
@classmethod
def get_datetime_strftime(cls, time_point, print_format):
"""Use the datetime library's strftime as a fallback."""
calendar_date = time_point.copy().to_calendar_date()
year, month, day = calendar_date.get_calendar_date()
hour, minute, second = time_point.get_hour_minute_second()
microsecond = int(1.0e6 * (second - int(second)))
hour = int(hour)
minute = int(minute)
second = int(second)
date_time = datetime(year, month, day, hour, minute, second,
microsecond)
return date_time.strftime(print_format)
def get_datetime_strptime(self, time_point_str, parse_format):
"""Use the datetime library's strptime as a fallback."""
date_time = datetime.strptime(time_point_str, parse_format)
return self.time_point_parser.parse(date_time.isoformat())
class RoseDateTimeOperator(object):
"""A class to parse and print date string with an offset."""
CURRENT_TIME_DUMP_FORMAT = u"CCYY-MM-DDThh:mm:ss+hh:mm"
CURRENT_TIME_DUMP_FORMAT_Z = u"CCYY-MM-DDThh:mm:ssZ"
NEGATIVE = "-"
# strptime formats and their compatibility with the ISO 8601 parser.
PARSE_FORMATS = [
("%a %b %d %H:%M:%S %Y", True), # ctime
("%a %b %d %H:%M:%S %Z %Y", True), # Unix "date"
("%Y-%m-%dT%H:%M:%S", False), # ISO8601, extended
("%Y%m%dT%H%M%S", False), # ISO8601, basic
("%Y%m%d%H", False) # Cylc (current)
]
REC_OFFSET = re.compile(r"""\A[\+\-]?(?:\d+[wdhms])+\Z""", re.I)
REC_OFFSET_FIND = re.compile(r"""(?P<num>\d+)(?P<unit>[wdhms])""")
STR_NOW = "now"
STR_REF = "ref"
TASK_CYCLE_TIME_ENV = "ROSE_TASK_CYCLE_TIME"
UNITS = {"w": "weeks",
"d": "days",
"h": "hours",
"m": "minutes",
"s": "seconds"}
def __init__(self, parse_format=None, utc_mode=False, calendar_mode=None,
ref_point_str=None):
"""Constructor.
parse_format -- If specified, parse with the specified format.
Otherwise, parse with one of the format strings in
self.PARSE_FORMATS. The format should be a string
compatible to strptime(3).
utc_mode -- If True, parse/print in UTC mode rather than local or
other timezones.
calendar_mode -- Set calendar mode, for isodatetime.data.Calendar.
ref_point_str -- Set the reference time point for operations.
If not specified, operations use current date time.
"""
self.parse_formats = self.PARSE_FORMATS
self.custom_parse_format = parse_format
self.utc_mode = utc_mode
if self.utc_mode:
assumed_time_zone = (0, 0)
else:
assumed_time_zone = None
self.set_calendar_mode(calendar_mode)
self.time_point_dumper = TimePointDumper()
self.time_point_parser = TimePointParser(
assumed_time_zone=assumed_time_zone)
self.duration_parser = DurationParser()
self.ref_point_str = ref_point_str
def date_format(self, print_format, time_point=None):
"""Reformat time_point according to print_format.
time_point -- The time point to format.
Otherwise, use ref date time.
"""
if time_point is None:
time_point = self.date_parse()[0]
if print_format is None:
return str(time_point)
if "%" in print_format:
try:
return time_point.strftime(print_format)
except ValueError:
return self.get_datetime_strftime(time_point, print_format)
return self.time_point_dumper.dump(time_point, print_format)
def date_parse(self, time_point_str=None):
"""Parse time_point_str.
Return (t, format) where t is a isodatetime.data.TimePoint object and
format is the format that matches time_point_str.
time_point_str -- The time point string to parse.
Otherwise, use ref time.
"""
if time_point_str is None or time_point_str == self.STR_REF:
time_point_str = self.ref_point_str
if time_point_str is None or time_point_str == self.STR_NOW:
time_point = get_timepoint_for_now()
time_point.set_time_zone_to_local()
if self.utc_mode or time_point.get_time_zone_utc(): # is in UTC
parse_format = self.CURRENT_TIME_DUMP_FORMAT_Z
else:
parse_format = self.CURRENT_TIME_DUMP_FORMAT
elif self.custom_parse_format is not None:
parse_format = self.custom_parse_format
time_point = self.strptime(time_point_str, parse_format)
else:
parse_formats = list(self.parse_formats)
time_point = None
while parse_formats:
parse_format, should_use_datetime = parse_formats.pop(0)
try:
if should_use_datetime:
time_point = self.get_datetime_strptime(
time_point_str,
parse_format)
else:
time_point = self.time_point_parser.strptime(
time_point_str,
parse_format)
break
except ValueError:
pass
if time_point is None:
time_point = self.time_point_parser.parse(
time_point_str,
dump_as_parsed=True)
parse_format = time_point.dump_format
if self.utc_mode:
time_point.set_time_zone_to_utc()
return time_point, parse_format
def date_shift(self, time_point=None, offset=None):
"""Return a date string with an offset.
time_point -- A time point or time point string.
Otherwise, use current time.
offset -- If specified, it should be a string containing the offset
that has the format "[+/-]nU[nU...]" where "n" is an
integer, and U is a unit matching a key in self.UNITS.
"""
if time_point is None:
time_point = self.date_parse()[0]
# Offset
if offset:
sign = "+"
if offset.startswith("-") or offset.startswith("+"):
sign = offset[0]
offset = offset[1:]
if offset.startswith("P"):
# Parse and apply.
try:
duration = self.duration_parser.parse(offset)
except ValueError:
raise OffsetValueError(offset)
if sign == "-":
time_point -= duration
else:
time_point += duration
else:
# Backwards compatibility for e.g. "-1h"
if not self.is_offset(offset):
raise OffsetValueError(offset)
for num, unit in self.REC_OFFSET_FIND.findall(offset.lower()):
num = int(num)
if sign == "-":
num = -num
key = self.UNITS[unit]
time_point += Duration(**{key: num})
return time_point
def date_diff(self, time_point_1=None, time_point_2=None):
"""Return (duration, is_negative) between two TimePoint objects.
duration -- is a Duration instance.
is_negative -- is a RoseDateTimeOperator.NEGATIVE if time_point_2 is
in the past of time_point_1.
"""
if time_point_2 < time_point_1:
return (time_point_1 - time_point_2, self.NEGATIVE)
else:
return (time_point_2 - time_point_1, "")
@classmethod
def date_diff_format(cls, print_format, duration, sign):
"""Format a duration."""
if print_format:
delta_lookup = {"y": duration.years,
"m": duration.months,
"d": duration.days,
"h": duration.hours,
"M": duration.minutes,
"s": duration.seconds}
expression = ""
for item in print_format:
if item in delta_lookup:
if float(delta_lookup[item]).is_integer():
expression += str(int(delta_lookup[item]))
else:
expression += str(delta_lookup[item])
else:
expression += item
return sign + expression
else:
return sign + str(duration)
@staticmethod
def get_calendar_mode():
"""Get current calendar mode."""
return Calendar.default().mode
def is_offset(self, offset):
"""Return True if the string offset can be parsed as an offset."""
return (self.REC_OFFSET.match(offset) is not None)
@staticmethod
def set_calendar_mode(calendar_mode=None):
"""Set calendar mode for subsequent operations.
Raise KeyError if calendar_mode is invalid.
"""
if not calendar_mode:
calendar_mode = os.getenv("ROSE_CYCLING_MODE")
if calendar_mode and calendar_mode in Calendar.MODES:
Calendar.default().set_mode(calendar_mode)
def strftime(self, time_point, print_format):
"""Use either the isodatetime or datetime strftime time formatting."""
try:
return time_point.strftime(print_format)
except ValueError:
return self.get_datetime_strftime(time_point, print_format)
def strptime(self, time_point_str, parse_format):
"""Use either the isodatetime or datetime strptime time parsing."""
try:
return self.time_point_parser.strptime(time_point_str,
parse_format)
except ValueError:
return self.get_datetime_strptime(time_point_str, parse_format)
@classmethod
def get_datetime_strftime(cls, time_point, print_format):
"""Use the datetime library's strftime as a fallback."""
calendar_date = time_point.copy().to_calendar_date()
year, month, day = calendar_date.get_calendar_date()
hour, minute, second = time_point.get_hour_minute_second()
microsecond = int(1.0e6 * (second - int(second)))
hour = int(hour)
minute = int(minute)
second = int(second)
date_time = datetime(year, month, day, hour, minute, second,
microsecond)
return date_time.strftime(print_format)
def get_datetime_strptime(self, time_point_str, parse_format):
"""Use the datetime library's strptime as a fallback."""
date_time = datetime.strptime(time_point_str, parse_format)
return self.time_point_parser.parse(date_time.isoformat())
