.. index:: object; code, code object

Code Objects

.. sectionauthor:: Jeffrey Yasskin <jyasskin@gmail.com>

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.

.. c:type:: PyCodeObject

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

.. c:var:: PyTypeObject PyCode_Type

 This is an instance of :c:type:`PyTypeObject` representing the Python
 :class:`code` type.

.. c:function:: int PyCode_Check(PyObject *co)

 Return true if *co* is a :class:`code` object.

.. c:function:: int PyCode_GetNumFree(PyCodeObject *co)

 Return the number of free variables in *co*.

.. c:function:: 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 :c:func:`PyCode_NewEmpty` instead. Calling :c:func:`PyCode_New` directly
 can bind you to a precise Python version since the definition of the bytecode
 changes often.

.. c:function:: PyCodeObject* PyCode_NewWithPosOnlyArgs(int argcount, int posonlyargcount, 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)

 Similar to :c:func:`PyCode_New`, but with an extra "posonlyargcount" for positonal-only arguments.

 .. versionadded:: 3.8

.. c:function:: 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
 :func:`exec` or :func:`eval` the resulting code object.

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