adii1823
37 lines
804 B
Python
37 lines
804 B
Python
# oop/class.attribute.shadowing.py
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class Point:
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x = 10
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y = 7
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p = Point()
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print(p.x) # 10 (from class attribute)
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print(p.y) # 7 (from class attribute)
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p.x = 12 # p gets its own `x` attribute
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print(p.x) # 12 (now found on the instance)
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print(Point.x) # 10 (class attribute still the same)
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del p.x # we delete instance attribute
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print(p.x) # 10 (now search has to go again to find class attr)
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p.z = 3 # let's make it a 3D point
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print(p.z) # 3
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print(Point.z)
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# AttributeError: type object 'Point' has no attribute 'z'
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"""
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$ python class.attribute.shadowing.py
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10
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7
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12
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10
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10
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3
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Traceback (most recent call last):
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File "/Users/fab/srv/lpp3e/v3/ch06/oop/class.attribute.shadowing.py", line 20, in <module>
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print(Point.z)
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AttributeError: type object 'Point' has no attribute 'z'
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"""
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