where are operators mapped to magic methods in python?

Question

I\'ve been reading about magic methods in python, and I\'ve found a lot of info about overriding them and what purpose they serve, but I haven\'t been able to find where i

Answer 1

dis module can somewhat help you on this:

let's take an example of simple list:

In [12]: def func():
    lis=[1,2,3]
    for i in range(5):
        lis+=[i]
   ....:         

In [13]: def func1():
    lis=[1,2,3]
    for i in range(5):
        lis =lis + [i]
   ....:         

In [14]: dis.dis(func)
  2           0 LOAD_CONST               1 (1)
              3 LOAD_CONST               2 (2)
              6 LOAD_CONST               3 (3)

             #removed some lines of code

  4          34 LOAD_FAST                0 (lis)
             37 LOAD_FAST                1 (i)
             40 BUILD_LIST               1
             43 INPLACE_ADD                       # += means inplace add is used
                                                  #     i.e `__iadd()__`
             44 STORE_FAST               0 (lis)
             47 JUMP_ABSOLUTE           28
        >>   50 POP_BLOCK           
        >>   51 LOAD_CONST               0 (None)
             54 RETURN_VALUE        

In [15]: dis.dis(func1)
  2           0 LOAD_CONST               1 (1)
              3 LOAD_CONST               2 (2)
              6 LOAD_CONST               3 (3)
              9 BUILD_LIST               3
             12 STORE_FAST               0 (lis)
             #removed some lines of code    
  4          34 LOAD_FAST                0 (lis)
             37 LOAD_FAST                1 (i)
             40 BUILD_LIST               1
             43 BINARY_ADD                          #normal binary add was used
                                                    #i.e __add__
             44 STORE_FAST               0 (lis)
             47 JUMP_ABSOLUTE           28
        >>   50 POP_BLOCK           
        >>   51 LOAD_CONST               0 (None)
             54 RETURN_VALUE