dis-magic 1.0.0

This allows you to visualize the bytecode of a cell in IPython upon running it.

Installation

pip3 install dis-magic

To manually load, run the following in your IPython prompt:

%load_ext dis_magic

To automatically load, add the following to your IPython configuration file:

c = get_config()
c.InteractiveShellApp.extensions.append('dis_magic')

Usage

Verifying Python follows PEMDAS:

In [6]: %dis foo = 6 ** 2 + 6
  1           0 LOAD_CONST               0 (42)
              2 STORE_NAME               0 (foo)
              4 LOAD_CONST               1 (None)
              6 RETURN_VALUE

You can use it in a cell too:

In [4]: %%dis
   ...:
   ...: def fibonacci(n: int) -> int:
   ...:     if n <= 1: return 1
   ...:     return fibonacci(n - 2) + fibonacci(n - 1)
   ...:
  2           0 LOAD_NAME                0 (int)
              2 LOAD_NAME                0 (int)
              4 LOAD_CONST               0 (('n', 'return'))
              6 BUILD_CONST_KEY_MAP      2
              8 LOAD_CONST               1 (<code object fibonacci at 0x111457b30, file "<dis>", line 2>)
             10 LOAD_CONST               2 ('fibonacci')
             12 MAKE_FUNCTION            4 (annotations)
             14 STORE_NAME               1 (fibonacci)
             16 LOAD_CONST               3 (None)
             18 RETURN_VALUE

Disassembly of <code object fibonacci at 0x111457b30, file "<dis>", line 2>:
  3           0 LOAD_FAST                0 (n)
              2 LOAD_CONST               1 (1)
              4 COMPARE_OP               1 (<=)
              6 POP_JUMP_IF_FALSE       12
              8 LOAD_CONST               1 (1)
             10 RETURN_VALUE

  4     >>   12 LOAD_GLOBAL              0 (fibonacci)
             14 LOAD_FAST                0 (n)
             16 LOAD_CONST               2 (2)
             18 BINARY_SUBTRACT
             20 CALL_FUNCTION            1
             22 LOAD_GLOBAL              0 (fibonacci)
             24 LOAD_FAST                0 (n)
             26 LOAD_CONST               1 (1)
             28 BINARY_SUBTRACT
             30 CALL_FUNCTION            1
             32 BINARY_ADD
             34 RETURN_VALUE