Example of __getattr__ magic method

getattr_ex.py

"""See https://stackoverflow.com/questions/3278077/difference-between-getattr-v
s-getattribute :
    __getattr__ is only invoked if the attribute wasn't found the usual ways. 
    It's good for implementing a fallback for missing attributes, and is probab
    ly the one of two you want.
"""

import numpy as np
        
class foo():
    def __init__(self,array):
        self.array = array
        
class bar():
    def __init__(self,array):
        self.array = array
    def __getattr__(self,name):
        return self.array.__getattribute__(name)
        
my_foo = foo(np.array([1]))
my_bar = bar(np.array([1,2,3,4,5,6,7,8,9,10]))

try:
    print(my_foo.shape) # AttributeError : 'foo' object has no attribute 'shape'
except:
    print(my_bar.shape)