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Python/C API Reference Manual

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Next: 6.3 Sequence Protocol Up: 6. Abstract Objects Layer Previous: 6.1 Object Protocol

6.2 Number Protocol

int PyNumber_Check (PyObject *o): Returns 1 if the object o provides numeric protocols, and false otherwise. This function always succeeds.

PyObject* PyNumber_Add (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of adding o1 and o2, or NULL on failure. This is the equivalent of the Python expression "o1 + o2".

PyObject* PyNumber_Subtract (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of subtracting o2 from o1, or NULL on failure. This is the equivalent of the Python expression "o1 - o2".

PyObject* PyNumber_Multiply (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of multiplying o1 and o2, or NULL on failure. This is the equivalent of the Python expression "o1 * o2".

PyObject* PyNumber_Divide (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of dividing o1 by o2, or NULL on failure. This is the equivalent of the Python expression "o1 / o2".

PyObject* PyNumber_Remainder (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the remainder of dividing o1 by o2, or NULL on failure. This is the equivalent of the Python expression "o1 % o2".

PyObject* PyNumber_Divmod (PyObject *o1, PyObject *o2): Return value: New reference.
See the built-in function divmod(). Returns NULL on failure. This is the equivalent of the Python expression "divmod(o1, o2)".

PyObject* PyNumber_Power (PyObject *o1, PyObject *o2, PyObject *o3): Return value: New reference.
See the built-in function pow(). Returns NULL on failure. This is the equivalent of the Python expression "pow(o1, o2, o3)", where o3 is optional. If o3 is to be ignored, pass Py_None in its place (passing NULL for o3 would cause an illegal memory access).

PyObject* PyNumber_Negative (PyObject *o): Return value: New reference.
Returns the negation of o on success, or NULL on failure. This is the equivalent of the Python expression "-o".

PyObject* PyNumber_Positive (PyObject *o): Return value: New reference.
Returns o on success, or NULL on failure. This is the equivalent of the Python expression "+o".

PyObject* PyNumber_Absolute (PyObject *o): Return value: New reference.
Returns the absolute value of o, or NULL on failure. This is the equivalent of the Python expression "abs(o)".

PyObject* PyNumber_Invert (PyObject *o): Return value: New reference.
Returns the bitwise negation of o on success, or NULL on failure. This is the equivalent of the Python expression "~o".

PyObject* PyNumber_Lshift (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of left shifting o1 by o2 on success, or NULL on failure. This is the equivalent of the Python expression "o1 « o2".

PyObject* PyNumber_Rshift (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of right shifting o1 by o2 on success, or NULL on failure. This is the equivalent of the Python expression "o1 » o2".

PyObject* PyNumber_And (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of ``anding'' o2 and o2 on success and NULL on failure. This is the equivalent of the Python expression "o1 and o2".

PyObject* PyNumber_Xor (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the bitwise exclusive or of o1 by o2 on success, or NULL on failure. This is the equivalent of the Python expression "o1 ^ o2".

PyObject* PyNumber_Or (PyObject *o1, PyObject *o2): Return value: New reference.
Returns the result of o1 and o2 on success, or NULL on failure. This is the equivalent of the Python expression "o1 or o2".

PyObject* PyNumber_Coerce (PyObject **p1, PyObject **p2): This function takes the addresses of two variables of type PyObject*. If the objects pointed to by *p1 and *p2 have the same type, increment their reference count and return 0 (success). If the objects can be converted to a common numeric type, replace *p1 and *p2 by their converted value (with 'new' reference counts), and return 0. If no conversion is possible, or if some other error occurs, return -1 (failure) and don't increment the reference counts. The call PyNumber_Coerce(&o1, &o2) is equivalent to the Python statement "o1, o2 = coerce(o1, o2)".

PyObject* PyNumber_Int (PyObject *o): Return value: New reference.
Returns the o converted to an integer object on success, or NULL on failure. This is the equivalent of the Python expression "int(o)".

PyObject* PyNumber_Long (PyObject *o): Return value: New reference.
Returns the o converted to a long integer object on success, or NULL on failure. This is the equivalent of the Python expression "long(o)".

PyObject* PyNumber_Float (PyObject *o): Return value: New reference.
Returns the o converted to a float object on success, or NULL on failure. This is the equivalent of the Python expression "float(o)".