class HasIdentity(object):
'''
An object that has a persistent identity.
When you make deepcopies of this object using `DontCopyPersistent()`, the
new copies will have the same "identity" as the original object:
>>> class A(HasIdentity):
... pass
>>> a0 = A()
>>> a1 = copy.deepcopy(a0, DontCopyPersistent)
>>> a0.has_same_identity_as(a1)
True
>>> a0 & a1 # Shortcut for `has_same_identity_as`
True
(`DontCopyPersistent` is available as
`python_toolbox.persistent.DontCopyPersistent`)
'''
def __init__(self):
self.__identity = CrossProcessPersistent()
'''The object's persistent identity.'''
def has_same_identity_as(self, other):
'''Does `other` have the same identity as us?'''
if not isinstance(other, HasIdentity):
return NotImplemented
return self.__identity.has_same_uuid_as(other.__identity)
__and__ = has_same_identity_as
personality = misc_tools.ProxyProperty(
'._HasIdentity__identity.personality',
doc='''Personality containing a human name and two colors.''')
def test_personality():
'''Test that a `CrossProcessPersistent` has a `.personality`.'''
a = A()
cross_process_persistent = CrossProcessPersistent()
assert isinstance(a.personality, persistent.Personality)
assert isinstance(cross_process_persistent.personality,
persistent.Personality)
class HasIdentity:
"""
An object that has a persistent identity.
When you make deepcopies of this object using `DontCopyPersistent()`, the
new copies will have the same "identity" as the original object:
>>> class A(HasIdentity):
... pass
>>> a0 = A()
>>> a1 = copy.deepcopy(a0, DontCopyPersistent)
>>> a0.has_same_identity_as(a1)
True
>>> a0 & a1 # Shortcut for `has_same_identity_as`
True
(`DontCopyPersistent` is available as
`python_toolbox.persistent.DontCopyPersistent`)
"""
def __init__(self):
self.__identity = CrossProcessPersistent()
"""The object's persistent identity."""
def has_same_identity_as(self, other):
"""Does `other` have the same identity as us?"""
if not isinstance(other, HasIdentity):
return NotImplemented
return self.__identity.has_same_uuid_as(other.__identity)
__and__ = has_same_identity_as
personality = misc_tools.ProxyProperty(
"._HasIdentity__identity.personality", doc="""Personality containing a human name and two colors."""
)
def test():
'''Test the basic workings of `Personality`.'''
cpp_1 = CrossProcessPersistent()
cpp_2 = CrossProcessPersistent()
cpp_3 = CrossProcessPersistent()
personality_1 = cpp_1.personality
personality_2 = cpp_2.personality
personality_3 = cpp_3.personality
human_name_1 = personality_1.human_name
human_name_2 = personality_2.human_name
human_name_3 = personality_3.human_name
assert isinstance(human_name_1, basestring)
assert isinstance(human_name_2, basestring)
assert isinstance(human_name_3, basestring)
light_color_1 = personality_1.light_color
light_color_2 = personality_2.light_color
light_color_3 = personality_3.light_color
dark_color_1 = personality_1.dark_color
dark_color_2 = personality_2.dark_color
dark_color_3 = personality_3.dark_color
for light_color in (light_color_1, light_color_2, light_color_3):
hls_value = colorsys.rgb_to_hls(*light_color)
lightness = hls_value[1]
assert 0.85 < lightness < 0.95
for dark_color in (dark_color_1, dark_color_2, dark_color_3):
hls_value = colorsys.rgb_to_hls(*dark_color)
lightness = hls_value[1]
assert 0.25 < lightness < 0.35
assert (human_name_1, light_color_1, dark_color_1) != \
(human_name_2, light_color_2, dark_color_2) != \
(human_name_3, light_color_3, dark_color_3) != \
(human_name_1, light_color_1, dark_color_1)
def test_helpful_warnings_for_old_protocols():
'''
Test that helpful errors are given when trying to pickle with old protocol.
'''
pickle_modules = [pickle, cPickle]
cross_process_persistents = [A(), CrossProcessPersistent()]
old_protocols = [0, 1]
iterator = itertools.product(pickle_modules, cross_process_persistents,
old_protocols)
for pickle_module, cross_process_persistent, old_protocol in iterator:
yield (_check_helpful_warnings_for_old_protocols, pickle_module,
cross_process_persistent, old_protocol)
def __init__(self):
self.__identity = CrossProcessPersistent()
'''The object's persistent identity.'''
def __init__(self):
self.__identity = CrossProcessPersistent()
'''The object's persistent identity.'''
