How to view the byte code instructions using the dis module

gd.py

print("Hello, World!")

Output

godarda@gd:~$ python3 gd.py
Hello, World!
godarda@gd:~$ python3 -m dis gd.py
0           0 RESUME                   0

1           2 PUSH_NULL
            4 LOAD_NAME                0 (print)
            6 LOAD_CONST               0 ('Hello, World!')
            8 CALL                     1
           16 POP_TOP
           18 RETURN_CONST             1 (None)
godarda@gd:~$

gd.py

a,b=10,20
(a,b)=(b,a)
print(a,b)

Output

godarda@gd:~$ python3 gd.py
20 10
godarda@gd:~$ python3 -m dis gd.py
0           0 RESUME                   0

1           2 LOAD_CONST               0 ((10, 20))
            4 UNPACK_SEQUENCE          2
            8 STORE_NAME               0 (a)
           10 STORE_NAME               1 (b)

2          12 LOAD_NAME                1 (b)
           14 LOAD_NAME                0 (a)
           16 SWAP                     2
           18 STORE_NAME               0 (a)
           20 STORE_NAME               1 (b)

3          22 PUSH_NULL
           24 LOAD_NAME                2 (print)
           26 LOAD_NAME                0 (a)
           28 LOAD_NAME                1 (b)
           30 CALL                     2
           38 POP_TOP
           40 RETURN_CONST             1 (None)
godarda@gd:~$

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