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__setitem__ / __getitem__

Python shark 1 min read

__setitem__ / __getitem__ / __delitem__

Example 1:

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class CustomList(object):
        values = []
         
        def __init__(self, nums=0):
            self.values = [0] * nums
 
        def __setitem__(self, idx, val):
            self.values[idx] = val
 
        def __getitem__(self, idx):
            return "Index {}, value {}".format(idx, self.values[idx])
 
        def __str__(self):
            return str(self.values)
 
obj = CustomList(12)
obj[0] = 1
print(obj[0])
print(obj)

Example 2:

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class CustomList(object):
        values = []
         
        def __init__(self, nums=0):
            self.values = [0] * nums
 
        def __setitem__(self, idx, val):
            self.values[idx] = val
 
        def __getitem__(self, idx):
            return "Index {}, value {}".format(idx, self.values[idx])
 
        def __delitem__(self, idx):
            del self.values[idx]
             
        def __str__(self):
            return str(self.values)
 
obj = CustomList(12)
obj[0] = 1
obj[1] = 2
obj[2] = 3
print(obj[0])
print(obj)
 
del obj[0]
print(obj)
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