Python 3.6.5 Documentation >  Code Objects

Code Objects
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Code objects are a low-level detail of the CPython implementation.
Each one represents a chunk of executable code that hasn’t yet been
bound into a function.

PyCodeObject

The C structure of the objects used to describe code objects. The
fields of this type are subject to change at any time.

PyTypeObject PyCode_Type

This is an instance of "PyTypeObject" representing the Python
"code" type.

int PyCode_Check(PyObject *co)

Return true if *co* is a "code" object.

int PyCode_GetNumFree(PyCodeObject *co)

Return the number of free variables in *co*.

PyCodeObject* PyCode_New(int argcount, int kwonlyargcount, int nlocals, int stacksize, int flags, PyObject *code, PyObject *consts, PyObject *names, PyObject *varnames, PyObject *freevars, PyObject *cellvars, PyObject *filename, PyObject *name, int firstlineno, PyObject *lnotab)

Return a new code object. If you need a dummy code object to
create a frame, use "PyCode_NewEmpty()" instead. Calling
"PyCode_New()" directly can bind you to a precise Python version
since the definition of the bytecode changes often.

PyCodeObject* PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno)

Return a new empty code object with the specified filename,
function name, and first line number. It is illegal to "exec()" or
"eval()" the resulting code object.