weird_arrays.log

In [1]: import numpy as np                                                                                                                             

In [2]: x = np.arange(1000000)                                                                                                                         

In [3]: y = x[::2]                                                                                                                                     

In [4]: y.__array_interface__                                                                                                                          
Out[4]: 
{'data': (4658720768, False),
 'strides': (16,),
 'descr': [('', '<i8')],
 'typestr': '<i8',
 'shape': (500000,),
 'version': 3}

In [5]: z = np.array([1,2,3])                                                                                                                          

In [7]: a = np.broadcast_to(z, (10000, 3))                                                                                                             

In [8]: a                                                                                                                                              
Out[8]: 
array([[1, 2, 3],
       [1, 2, 3],
       [1, 2, 3],
       ...,
       [1, 2, 3],
       [1, 2, 3],
       [1, 2, 3]])

In [9]: a.__array_interface__                                                                                                                          
Out[9]: 
{'data': (140273029586960, True),
 'strides': (0, 8),
 'descr': [('', '<i8')],
 'typestr': '<i8',
 'shape': (10000, 3),
 'version': 3}
 
 In [11]: b = np.broadcast_to(3, (3, 4, 5))                                                                                                             

In [12]: b.__array_interface__                                                                                                                         
Out[12]: 
{'data': (140272993648288, True),
 'strides': (0, 0, 0),
 'descr': [('', '<i8')],
 'typestr': '<i8',
 'shape': (3, 4, 5),
 'version': 3}