mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
282 lines
10 KiB
ReStructuredText
282 lines
10 KiB
ReStructuredText
.. highlightlang:: c
|
|
|
|
.. _number:
|
|
|
|
Number Protocol
|
|
===============
|
|
|
|
|
|
.. c:function:: int PyNumber_Check(PyObject *o)
|
|
|
|
Returns ``1`` if the object *o* provides numeric protocols, and false otherwise.
|
|
This function always succeeds.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Add(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of adding *o1* and *o2*, or *NULL* on failure. This is the
|
|
equivalent of the Python expression ``o1 + o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Subtract(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of subtracting *o2* from *o1*, or *NULL* on failure. This is
|
|
the equivalent of the Python expression ``o1 - o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Multiply(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of multiplying *o1* and *o2*, or *NULL* on failure. This is
|
|
the equivalent of the Python expression ``o1 * o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_MatrixMultiply(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of matrix multiplication on *o1* and *o2*, or *NULL* on
|
|
failure. This is the equivalent of the Python expression ``o1 @ o2``.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_FloorDivide(PyObject *o1, PyObject *o2)
|
|
|
|
Return the floor of *o1* divided by *o2*, or *NULL* on failure. This is
|
|
equivalent to the "classic" division of integers.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_TrueDivide(PyObject *o1, PyObject *o2)
|
|
|
|
Return a reasonable approximation for the mathematical value of *o1* divided by
|
|
*o2*, or *NULL* on failure. The return value is "approximate" because binary
|
|
floating point numbers are approximate; it is not possible to represent all real
|
|
numbers in base two. This function can return a floating point value when
|
|
passed two integers.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Remainder(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the remainder of dividing *o1* by *o2*, or *NULL* on failure. This is
|
|
the equivalent of the Python expression ``o1 % o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Divmod(PyObject *o1, PyObject *o2)
|
|
|
|
.. index:: builtin: divmod
|
|
|
|
See the built-in function :func:`divmod`. Returns *NULL* on failure. This is
|
|
the equivalent of the Python expression ``divmod(o1, o2)``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Power(PyObject *o1, PyObject *o2, PyObject *o3)
|
|
|
|
.. index:: builtin: pow
|
|
|
|
See the built-in function :func:`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 :c:data:`Py_None` in its place (passing *NULL* for
|
|
*o3* would cause an illegal memory access).
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Negative(PyObject *o)
|
|
|
|
Returns the negation of *o* on success, or *NULL* on failure. This is the
|
|
equivalent of the Python expression ``-o``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Positive(PyObject *o)
|
|
|
|
Returns *o* on success, or *NULL* on failure. This is the equivalent of the
|
|
Python expression ``+o``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Absolute(PyObject *o)
|
|
|
|
.. index:: builtin: abs
|
|
|
|
Returns the absolute value of *o*, or *NULL* on failure. This is the equivalent
|
|
of the Python expression ``abs(o)``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Invert(PyObject *o)
|
|
|
|
Returns the bitwise negation of *o* on success, or *NULL* on failure. This is
|
|
the equivalent of the Python expression ``~o``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Lshift(PyObject *o1, PyObject *o2)
|
|
|
|
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``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Rshift(PyObject *o1, PyObject *o2)
|
|
|
|
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``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_And(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the "bitwise and" of *o1* and *o2* on success and *NULL* on failure.
|
|
This is the equivalent of the Python expression ``o1 & o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Xor(PyObject *o1, PyObject *o2)
|
|
|
|
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``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Or(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the "bitwise or" of *o1* and *o2* on success, or *NULL* on failure.
|
|
This is the equivalent of the Python expression ``o1 | o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceAdd(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of adding *o1* and *o2*, or *NULL* on failure. The operation
|
|
is done *in-place* when *o1* supports it. This is the equivalent of the Python
|
|
statement ``o1 += o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceSubtract(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of subtracting *o2* from *o1*, or *NULL* on failure. The
|
|
operation is done *in-place* when *o1* supports it. This is the equivalent of
|
|
the Python statement ``o1 -= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceMultiply(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of multiplying *o1* and *o2*, or *NULL* on failure. The
|
|
operation is done *in-place* when *o1* supports it. This is the equivalent of
|
|
the Python statement ``o1 *= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceMatrixMultiply(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of matrix multiplication on *o1* and *o2*, or *NULL* on
|
|
failure. The operation is done *in-place* when *o1* supports it. This is
|
|
the equivalent of the Python statement ``o1 @= o2``.
|
|
|
|
.. versionadded:: 3.5
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceFloorDivide(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the mathematical floor of dividing *o1* by *o2*, or *NULL* on failure.
|
|
The operation is done *in-place* when *o1* supports it. This is the equivalent
|
|
of the Python statement ``o1 //= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceTrueDivide(PyObject *o1, PyObject *o2)
|
|
|
|
Return a reasonable approximation for the mathematical value of *o1* divided by
|
|
*o2*, or *NULL* on failure. The return value is "approximate" because binary
|
|
floating point numbers are approximate; it is not possible to represent all real
|
|
numbers in base two. This function can return a floating point value when
|
|
passed two integers. The operation is done *in-place* when *o1* supports it.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceRemainder(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the remainder of dividing *o1* by *o2*, or *NULL* on failure. The
|
|
operation is done *in-place* when *o1* supports it. This is the equivalent of
|
|
the Python statement ``o1 %= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlacePower(PyObject *o1, PyObject *o2, PyObject *o3)
|
|
|
|
.. index:: builtin: pow
|
|
|
|
See the built-in function :func:`pow`. Returns *NULL* on failure. The operation
|
|
is done *in-place* when *o1* supports it. This is the equivalent of the Python
|
|
statement ``o1 **= o2`` when o3 is :c:data:`Py_None`, or an in-place variant of
|
|
``pow(o1, o2, o3)`` otherwise. If *o3* is to be ignored, pass :c:data:`Py_None`
|
|
in its place (passing *NULL* for *o3* would cause an illegal memory access).
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceLshift(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of left shifting *o1* by *o2* on success, or *NULL* on
|
|
failure. The operation is done *in-place* when *o1* supports it. This is the
|
|
equivalent of the Python statement ``o1 <<= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceRshift(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the result of right shifting *o1* by *o2* on success, or *NULL* on
|
|
failure. The operation is done *in-place* when *o1* supports it. This is the
|
|
equivalent of the Python statement ``o1 >>= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceAnd(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the "bitwise and" of *o1* and *o2* on success and *NULL* on failure. The
|
|
operation is done *in-place* when *o1* supports it. This is the equivalent of
|
|
the Python statement ``o1 &= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceXor(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the "bitwise exclusive or" of *o1* by *o2* on success, or *NULL* on
|
|
failure. The operation is done *in-place* when *o1* supports it. This is the
|
|
equivalent of the Python statement ``o1 ^= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_InPlaceOr(PyObject *o1, PyObject *o2)
|
|
|
|
Returns the "bitwise or" of *o1* and *o2* on success, or *NULL* on failure. The
|
|
operation is done *in-place* when *o1* supports it. This is the equivalent of
|
|
the Python statement ``o1 |= o2``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Long(PyObject *o)
|
|
|
|
.. index:: builtin: int
|
|
|
|
Returns the *o* converted to an integer object on success, or *NULL* on
|
|
failure. This is the equivalent of the Python expression ``int(o)``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Float(PyObject *o)
|
|
|
|
.. index:: builtin: float
|
|
|
|
Returns the *o* converted to a float object on success, or *NULL* on failure.
|
|
This is the equivalent of the Python expression ``float(o)``.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_Index(PyObject *o)
|
|
|
|
Returns the *o* converted to a Python int on success or *NULL* with a
|
|
:exc:`TypeError` exception raised on failure.
|
|
|
|
|
|
.. c:function:: PyObject* PyNumber_ToBase(PyObject *n, int base)
|
|
|
|
Returns the integer *n* converted to base *base* as a string. The *base*
|
|
argument must be one of 2, 8, 10, or 16. For base 2, 8, or 16, the
|
|
returned string is prefixed with a base marker of ``'0b'``, ``'0o'``, or
|
|
``'0x'``, respectively. If *n* is not a Python int, it is converted with
|
|
:c:func:`PyNumber_Index` first.
|
|
|
|
|
|
.. c:function:: Py_ssize_t PyNumber_AsSsize_t(PyObject *o, PyObject *exc)
|
|
|
|
Returns *o* converted to a Py_ssize_t value if *o* can be interpreted as an
|
|
integer. If the call fails, an exception is raised and -1 is returned.
|
|
|
|
If *o* can be converted to a Python int but the attempt to
|
|
convert to a Py_ssize_t value would raise an :exc:`OverflowError`, then the
|
|
*exc* argument is the type of exception that will be raised (usually
|
|
:exc:`IndexError` or :exc:`OverflowError`). If *exc* is *NULL*, then the
|
|
exception is cleared and the value is clipped to *PY_SSIZE_T_MIN* for a negative
|
|
integer or *PY_SSIZE_T_MAX* for a positive integer.
|
|
|
|
|
|
.. c:function:: int PyIndex_Check(PyObject *o)
|
|
|
|
Returns True if *o* is an index integer (has the nb_index slot of the
|
|
tp_as_number structure filled in).
|