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128 lines
2.7 KiB
Python
128 lines
2.7 KiB
Python
# Copyright 2025, Kay Hayen, mailto:kay.hayen@gmail.com find license text at end of file
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from __future__ import print_function
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def closureTest1():
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# Assign, but the value is not supposed to be used by the function, instead the later
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# update is effective.
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d = 1
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def subby():
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return d
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d = 22222 * 2222
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return subby()
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def closureTest2():
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# Using a closure variable that is not initialized at the time it is closured should
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# work as well.
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def subby():
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return d
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d = 2222 * 2222
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return subby()
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def closureTest3():
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def subby():
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return undefined_global
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try:
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return subby()
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except NameError:
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return 88
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d = 1
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def scopeTest4():
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try:
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return d
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d = 1
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except UnboundLocalError as e:
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return repr(e)
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print("Test closure where value is overwritten:", closureTest1())
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print("Test closure where value is assigned only late:", closureTest2())
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print("Test function where closured value is never assigned:", closureTest3())
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print("Scope test where UnboundLocalError is expected:", scopeTest4())
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def function():
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pass
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class ClosureLocalizerClass:
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print("Function before assigned in a class:", function)
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function = 1
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print("Function after it was assigned in class:", function)
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ClosureLocalizerClass()
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def ClosureLocalizerFunction():
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try:
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function = function
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print("Function didn't give unbound local error")
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except UnboundLocalError as e:
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print(
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"Function gave unbound local error when accessing function before assignment:",
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repr(e),
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)
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ClosureLocalizerFunction()
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class X:
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def __init__(self, x):
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self.x = x
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def changingClosure():
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print("Changing a closure taken value after it was taken.")
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a = 1
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def closureTaker():
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return X(a)
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x = closureTaker()
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a = 2
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print("Closure value first time:", x.x)
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x = closureTaker()
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print("Closure value second time:", x.x)
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changingClosure()
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# Python tests originally created or extracted from other peoples work. The
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# parts were too small to be protected.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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