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# Copyright (c) 2012 - 2018, Anaconda, Inc. All rights reserved.
#
# Powered by the Bokeh Development Team.
#
# The full license is in the file LICENSE.txt, distributed with this software.
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''' Provide date and time related properties
'''
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# Boilerplate
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from __future__ import absolute_import, division, print_function, unicode_literals
import logging
log = logging.getLogger(__name__)
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# Imports
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# Standard library imports
import datetime
import dateutil.parser
# External imports
from six import string_types
# Bokeh imports
from ...util.dependencies import import_optional
from .bases import Property
from .primitive import bokeh_integer_types
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# Globals and constants
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__all__ = (
'Date',
'Datetime',
'TimeDelta',
)
pd = import_optional('pandas')
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# General API
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[docs]class Date(Property):
''' Accept Date (but not DateTime) values.
'''
def __init__(self, default=None, help=None):
super(Date, self).__init__(default=default, help=help)
def transform(self, value):
value = super(Date, self).transform(value)
if isinstance(value, (float,) + bokeh_integer_types):
try:
value = datetime.date.fromtimestamp(value)
except (ValueError, OSError):
value = datetime.date.fromtimestamp(value/1000)
elif isinstance(value, string_types):
value = dateutil.parser.parse(value).date()
return value
def validate(self, value, detail=True):
super(Date, self).validate(value, detail)
if not (value is None or isinstance(value, (datetime.date,) + string_types + (float,) + bokeh_integer_types)):
msg = "" if not detail else "expected a date, string or timestamp, got %r" % value
raise ValueError(msg)
[docs]class Datetime(Property):
''' Accept Datetime values.
'''
def __init__(self, default=datetime.date.today(), help=None):
super(Datetime, self).__init__(default=default, help=help)
def transform(self, value):
value = super(Datetime, self).transform(value)
return value
# Handled by serialization in protocol.py for now
def validate(self, value, detail=True):
super(Datetime, self).validate(value, detail)
datetime_types = (datetime.datetime, datetime.date)
try:
import numpy as np
datetime_types += (np.datetime64,)
except (ImportError, AttributeError) as e:
if e.args == ("'module' object has no attribute 'datetime64'",):
import sys
if 'PyPy' in sys.version:
pass
else:
raise e
else:
pass
if (isinstance(value, datetime_types)):
return
if pd and isinstance(value, (pd.Timestamp)):
return
msg = "" if not detail else "Expected a datetime instance, got %r" % value
raise ValueError(msg)
[docs]class TimeDelta(Property):
''' Accept TimeDelta values.
'''
def __init__(self, default=datetime.timedelta(), help=None):
super(TimeDelta, self).__init__(default=default, help=help)
def transform(self, value):
value = super(TimeDelta, self).transform(value)
return value
# Handled by serialization in protocol.py for now
def validate(self, value, detail=True):
super(TimeDelta, self).validate(value, detail)
timedelta_types = (datetime.timedelta,)
try:
import numpy as np
timedelta_types += (np.timedelta64,)
except (ImportError, AttributeError) as e:
if e.args == ("'module' object has no attribute 'timedelta64'",):
import sys
if 'PyPy' in sys.version:
pass
else:
raise e
else:
pass
if (isinstance(value, timedelta_types)):
return
if pd and isinstance(value, (pd.Timedelta)):
return
msg = "" if not detail else "Expected a timedelta instance, got %r" % value
raise ValueError(msg)
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# Dev API
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# Private API
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#-----------------------------------------------------------------------------
# Code
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