The PyFloatObject is used to store floating point numbers in python. The definition of this is in the file Include/floatobject.h

typedef struct {
PyObject_HEAD
double ob_fval;
} PyFloatObject;

We observe that it is just a wrapping around the plain double object of the C programming language.

Let us look at the type definition for the float object.

static PyNumberMethods float_as_number = {
float_add, /*nb_add*/
float_sub, /*nb_subtract*/
float_mul, /*nb_multiply*/
float_classic_div, /*nb_divide*/
float_rem, /*nb_remainder*/
float_divmod, /*nb_divmod*/
float_pow, /*nb_power*/
(unaryfunc)float_neg, /*nb_negative*/
(unaryfunc)float_float, /*nb_positive*/
(unaryfunc)float_abs, /*nb_absolute*/
(inquiry)float_nonzero, /*nb_nonzero*/
0, /*nb_invert*/
0, /*nb_lshift*/
0, /*nb_rshift*/
0, /*nb_and*/
0, /*nb_xor*/
0, /*nb_or*/
float_coerce, /*nb_coerce*/
float_trunc, /*nb_int*/
float_long, /*nb_long*/
float_float, /*nb_float*/
0, /* nb_oct */
0, /* nb_hex */
0, /* nb_inplace_add */
0, /* nb_inplace_subtract */
0, /* nb_inplace_multiply */
0, /* nb_inplace_divide */
0, /* nb_inplace_remainder */
0, /* nb_inplace_power */
0, /* nb_inplace_lshift */
0, /* nb_inplace_rshift */
0, /* nb_inplace_and */
0, /* nb_inplace_xor */
0, /* nb_inplace_or */
float_floor_div, /* nb_floor_divide */
float_div, /* nb_true_divide */
0, /* nb_inplace_floor_divide */
0, /* nb_inplace_true_divide */
};

PyTypeObject PyFloat_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
“float”,
sizeof(PyFloatObject),
0,
(destructor)float_dealloc, /* tp_dealloc */
(printfunc)float_print, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc)float_repr, /* tp_repr */
&float_as_number, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
(hashfunc)float_hash, /* tp_hash */
0, /* tp_call */
(reprfunc)float_str, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
Py_TPFLAGS_BASETYPE, /* tp_flags */
float_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
float_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
float_methods, /* tp_methods */
0, /* tp_members */
float_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
float_new, /* tp_new */
};

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