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69 lines
2.4 KiB
69 lines
2.4 KiB
#!/usr/bin/env python3 |
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# MIT License |
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# |
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# Copyright (c) 2024 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com> |
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# |
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# Permission is hereby granted, free of charge, to any person obtaining a copy |
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# of this software and associated documentation files (the "Software"), to deal |
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# in the Software without restriction, including without limitation the rights |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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# copies of the Software, and to permit persons to whom the Software is |
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# furnished to do so, subject to the following conditions: |
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# |
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# The above copyright notice and this permission notice shall be included in all |
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# copies or substantial portions of the Software. |
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# |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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# SOFTWARE. |
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class A(): |
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def __init__(self,a,b) -> None: |
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self.a = a |
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self.b = b |
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def __str__(self): return f"a={self.a}, b={self.b}" |
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def __hash__(self): return 123 |
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def __eq__(self, other): return f"A( ). eq {type(self).__name__} {type(other).__name__}" |
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class B(): |
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def __init__(self,a,b) -> None: |
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self.a = a |
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self.b = b |
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def __eq__(self, other): return f"B( ). eq {type(self).__name__} {type(other).__name__}" |
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class C(A): |
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def __eq__(self, other): return f"C(A). eq {type(self).__name__} {type(other).__name__}" |
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class D(C): |
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def __init__(self,a,b) -> None: |
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self.a = a |
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self.b = b |
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def __eq__( self, other): return f"D(C). eq {type(self).__name__} {type(other).__name__}" |
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a = A(1,2) |
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aa = a |
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b = B(1,2) |
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bb = b |
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c = C(1,2) |
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cc = c |
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d = D(1,2) |
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print(f"{(a == aa)=} | {(a is aa)=}") |
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print(f"{(aa == a )=} | {(aa is a )=}") |
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print(f"{(a == c )=} | {(a is c )=}") |
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print(f"{(c == a )=} | {(c is a )=}") |
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print(f"{(a == b )=} | {(a is b )=}") |
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print(f"{(b == a )=} | {(b is a )=}") |
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print(f"{(b == c )=} | {(b is c )=}") |
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print(f"{(c == b )=} | {(c is b )=}") |
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print(f"{(c == d )=} | {(c is d )=}") |
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print(f"{(d == c )=} | {(d is c )=}") |
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print(f"{(d == d )=} | {(d is d )=}") |