Python == is deep

python_deep_eq.py

In [4]: l = [{'x': [254, 247, 230, 225, 222, 221, 231, 247, 281, 314, 381, 461, 487, 508, 517
   ...: , 504, 460, 431, 380, 346, 318, 301, 305, 309, 328, 359, 400, 413, 438, 441, 447, 472
   ...: , 490, 511, 519, 529, 529], 'y': [26, 25, 26, 28, 32, 37, 51, 58, 59, 56, 44, 34, 34,
   ...:  34, 35, 46, 60, 66, 75, 83, 91, 99, 101, 102, 105, 105, 105, 106, 110, 113, 116, 116
   ...: , 116, 116, 116, 112, 107]}, {'x': [479], 'y': [123]}, {'x': [20, 24, 27, 34, 45, 48,
   ...:  51, 59, 67, 71, 76, 80, 97, 108], 'y': [46, 48, 51, 58, 69, 72, 75, 82, 86, 87, 88, 
   ...: 89, 93, 96]}, {'x': [619, 619, 620, 620, 620, 620], 'y': [29, 37, 41, 50, 55, 64]}] 
   ...:                                                                                      

In [5]: l2 = [{'x': [254, 247, 230, 225, 222, 221, 231, 247, 281, 314, 381, 461, 487, 508, 51
   ...: 7, 504, 460, 431, 380, 346, 318, 301, 305, 309, 328, 359, 400, 413, 438, 441, 447, 47
   ...: 2, 490, 511, 519, 529, 529], 'y': [26, 25, 26, 28, 32, 37, 51, 58, 59, 56, 44, 34, 34
   ...: , 34, 35, 46, 60, 66, 75, 83, 91, 99, 101, 102, 105, 105, 105, 106, 110, 113, 116, 11
   ...: 6, 116, 116, 116, 112, 107]}, {'x': [479], 'y': [123]}, {'x': [20, 24, 27, 34, 45, 48
   ...: , 51, 59, 67, 71, 76, 80, 97, 108], 'y': [46, 48, 51, 58, 69, 72, 75, 82, 86, 87, 88,
   ...:  89, 93, 96]}, {'x': [619, 619, 620, 620, 620, 620], 'y': [29, 37, 41, 50, 55, 64]}] 
   ...:                                                                                      

In [6]: len(l)                                                                               
Out[6]: 4

In [7]: len(l2)                                                                              
Out[7]: 4

In [8]: l.append('test')                                                                     

In [9]: l[-1]                                                                                
Out[9]: 'test'

In [10]: l2[-1]                                                                              
Out[10]: {'x': [619, 619, 620, 620, 620, 620], 'y': [29, 37, 41, 50, 55, 64]}

In [11]: l = l[:-1]                                                                          

In [12]: l[-1]                                                                               
Out[12]: {'x': [619, 619, 620, 620, 620, 620], 'y': [29, 37, 41, 50, 55, 64]}

In [13]: l == l2                                                                             
Out[13]: True