Code Objects

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.


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.