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#!/usr/bin/env python
#
# Author: Mike McKerns (mmckerns @caltech and @uqfoundation)
# Copyright (c) 2019-2023 The Uncertainty Quantification Foundation.
# License: 3-clause BSD. The full license text is available at:
# - https://github.com/uqfoundation/dill/blob/master/LICENSE
import dill
from functools import partial
import warnings
def copy(obj, byref=False, recurse=False):
if byref:
try:
return dill.copy(obj, byref=byref, recurse=recurse)
except Exception:
pass
else:
raise AssertionError('Copy of %s with byref=True should have given a warning!' % (obj,))
warnings.simplefilter('ignore')
val = dill.copy(obj, byref=byref, recurse=recurse)
warnings.simplefilter('error')
return val
else:
return dill.copy(obj, byref=byref, recurse=recurse)
class obj1(object):
def __init__(self):
super(obj1, self).__init__()
class obj2(object):
def __init__(self):
super(obj2, self).__init__()
class obj3(object):
super_ = super
def __init__(self):
obj3.super_(obj3, self).__init__()
def test_super():
assert copy(obj1(), byref=True)
assert copy(obj1(), byref=True, recurse=True)
assert copy(obj1(), recurse=True)
assert copy(obj1())
assert copy(obj2(), byref=True)
assert copy(obj2(), byref=True, recurse=True)
assert copy(obj2(), recurse=True)
assert copy(obj2())
assert copy(obj3(), byref=True)
assert copy(obj3(), byref=True, recurse=True)
assert copy(obj3(), recurse=True)
assert copy(obj3())
def get_trigger(model):
pass
class Machine(object):
def __init__(self):
self.child = Model()
self.trigger = partial(get_trigger, self)
self.child.trigger = partial(get_trigger, self.child)
class Model(object):
pass
def test_partial():
assert copy(Machine(), byref=True)
assert copy(Machine(), byref=True, recurse=True)
assert copy(Machine(), recurse=True)
assert copy(Machine())
class Machine2(object):
def __init__(self):
self.go = partial(self.member, self)
def member(self, model):
pass
class SubMachine(Machine2):
def __init__(self):
super(SubMachine, self).__init__()
def test_partials():
assert copy(SubMachine(), byref=True)
assert copy(SubMachine(), byref=True, recurse=True)
assert copy(SubMachine(), recurse=True)
assert copy(SubMachine())
class obj4(object):
def __init__(self):
super(obj4, self).__init__()
a = self
class obj5(object):
def __init__(self):
super(obj5, self).__init__()
self.a = a
self.b = obj5()
def test_circular_reference():
assert copy(obj4())
obj4_copy = dill.loads(dill.dumps(obj4()))
assert type(obj4_copy) is type(obj4_copy).__init__.__closure__[0].cell_contents
assert type(obj4_copy.b) is type(obj4_copy.b).__init__.__closure__[0].cell_contents
def f():
def g():
return g
return g
def test_function_cells():
assert copy(f())
def fib(n):
assert n >= 0
if n <= 1:
return n
else:
return fib(n-1) + fib(n-2)
def test_recursive_function():
global fib
fib2 = copy(fib, recurse=True)
fib3 = copy(fib)
fib4 = fib
del fib
assert fib2(5) == 5
for _fib in (fib3, fib4):
try:
_fib(5)
except Exception:
# This is expected to fail because fib no longer exists
pass
else:
raise AssertionError("Function fib shouldn't have been found")
fib = fib4
def collection_function_recursion():
d = {}
def g():
return d
d['g'] = g
return g
def test_collection_function_recursion():
g = copy(collection_function_recursion())
assert g()['g'] is g
if __name__ == '__main__':
with warnings.catch_warnings():
warnings.simplefilter('error')
test_super()
test_partial()
test_partials()
test_circular_reference()
test_function_cells()
test_recursive_function()
test_collection_function_recursion()