Small set-up:

from idis import idis
from dis import dis

def foo():
    a = 1
    b = 2
    def f(x):
        global b
        b = 3
        y = x + 1
        return y 
    f(4)
    print(a)

The difference between dis.dis and idis.idis:

idis(foo) # tweakable via the 'columns' arg

Disassembly of <code object foo at 0x00000184C62C3240, file "c:\Users\phant1e\Desktop\auto\test.py", line 56>:
    hasconst -> (None, 1, 2, <code object f at 0x00000184C61BFC90, file "c:\Users\phant1e\Desktop\auto\test.py", line 59>, 'foo.<locals>.f', 4)
    hasname -> ('print',)
    haslocal -> ('a', 'b', 'f')

            opname          opcode   flag       arg   pointsto         argval            argtype    hasarg
            ¯¯¯¯¯¯          ¯¯¯¯¯¯   ¯¯¯¯       ¯¯¯   ¯¯¯¯¯¯¯¯         ¯¯¯¯¯¯            ¯¯¯¯¯¯¯    ¯¯¯¯¯¯
57        0 LOAD_CONST      100      hasconst     1   co_consts[1]     1                 int        ✔
          2 STORE_FAST      125      haslocal     0   co_varnames[0]   a                 str        ✔

58        4 LOAD_CONST      100      hasconst     2   co_consts[2]     2                 int        ✔
          6 STORE_FAST      125      haslocal     1   co_varnames[1]   b                 str        ✔

59        8 LOAD_CONST      100      hasconst     3   co_consts[3]     <code object f>   code       ✔
         10 LOAD_CONST      100      hasconst     4   co_consts[4]     foo.<locals>.f    str        ✔
         12 MAKE_FUNCTION   132                   0                                                 ✔
         14 STORE_FAST      125      haslocal     2   co_varnames[2]   f                 str        ✔

64       16 LOAD_FAST       124      haslocal     2   co_varnames[2]   f                 str        ✔
         18 LOAD_CONST      100      hasconst     5   co_consts[5]     4                 int        ✔
         20 CALL_FUNCTION   131                   1                                                 ✔
         22 POP_TOP         1                                                                         ✖

65       24 LOAD_GLOBAL     116      hasname      0   co_names[0]      print             str        ✔
         26 LOAD_FAST       124      haslocal     0   co_varnames[0]   a                 str        ✔
         28 CALL_FUNCTION   131                   1                                                 ✔
         30 POP_TOP         1                                                                         ✖
         32 LOAD_CONST      100      hasconst     0   co_consts[0]     None              NoneType   ✔
         34 RETURN_VALUE    83                                                                        ✖

Disassembly of <code object f at 0x00000184C61BFC90, file "c:\Users\phant1e\Desktop\auto\test.py", line 59>:
    hasconst -> (None, 3, 1)
    hasname -> ('b',)
    haslocal -> ('x', 'y')

            opname          opcode   flag       arg   pointsto         argval            argtype    hasarg
            ¯¯¯¯¯¯          ¯¯¯¯¯¯   ¯¯¯¯       ¯¯¯   ¯¯¯¯¯¯¯¯         ¯¯¯¯¯¯            ¯¯¯¯¯¯¯    ¯¯¯¯¯¯
61        0 LOAD_CONST      100      hasconst     1   co_consts[1]     3                 int        ✔
          2 STORE_GLOBAL    97       hasname      0   co_names[0]      b                 str        ✔

62        4 LOAD_FAST       124      haslocal     0   co_varnames[0]   x                 str        ✔
          6 LOAD_CONST      100      hasconst     2   co_consts[2]     1                 int        ✔
          8 BINARY_ADD      23                                                                        ✖
         10 STORE_FAST      125      haslocal     1   co_varnames[1]   y                 str        ✔

63       12 LOAD_FAST       124      haslocal     1   co_varnames[1]   y                 str        ✔
         14 RETURN_VALUE    83                                                                        ✖

dis(foo)

 57           0 LOAD_CONST               1 (1)
              2 STORE_FAST               0 (a)

 58           4 LOAD_CONST               2 (2)
              6 STORE_FAST               1 (b)

 59           8 LOAD_CONST               3 (<code object f at 0x000002C93C94FC90, file "c:\Users\phant1e\Desktop\auto\test.py", line 59>)
             10 LOAD_CONST               4 ('foo.<locals>.f')
             12 MAKE_FUNCTION            0
             14 STORE_FAST               2 (f)

 64          16 LOAD_FAST                2 (f)
             18 LOAD_CONST               5 (4)
             20 CALL_FUNCTION            1
             22 POP_TOP

 65          24 LOAD_GLOBAL              0 (print)
             26 LOAD_FAST                0 (a)
             28 CALL_FUNCTION            1
             30 POP_TOP
             32 LOAD_CONST               0 (None)
             34 RETURN_VALUE

Disassembly of <code object f at 0x000002C93C94FC90, file "c:\Users\phant1e\Desktop\auto\test.py", line 59>:
 61           0 LOAD_CONST               1 (3)
              2 STORE_GLOBAL             0 (b)

 62           4 LOAD_FAST                0 (x)
              6 LOAD_CONST               2 (1)
              8 BINARY_ADD
             10 STORE_FAST               1 (y)

 63          12 LOAD_FAST                1 (y)
             14 RETURN_VALUE

Install:

pip install git+https://github.com/phantie/informative-disassembler.git -U