python: how to get the source from a code object? [duplicate]

Answer 1

Without the source code, you can only approximate the code. You can disassemble the compiled bytecode with the dis module, then reconstruct the source code as an approximation:

>>> import dis
>>> TheString = "k=abs(x)+y"
>>> Binary = compile( TheString , "<string>" , "exec" )
>>> dis.dis(Binary)
  1           0 LOAD_NAME                0 (abs)
              3 LOAD_NAME                1 (x)
              6 CALL_FUNCTION            1
              9 LOAD_NAME                2 (y)
             12 BINARY_ADD          
             13 STORE_NAME               3 (k)
             16 LOAD_CONST               0 (None)
             19 RETURN_VALUE        

From the disassembly we can see there was 1 line, where a function named abs() is being called with one argument named x. The result is added to another name y, and the result is stored in k.

Projects like uncompile6 (building on top of the work of many others) do just that; decompile the python bytecode and reconstruct Python code from that.