Floating Point Objects — Python documentation
From Get docs
Python/docs/3.8/c-api/float
Floating Point Objects
- type PyFloatObject
- This subtype of PyObject represents a Python floating point object.
- PyTypeObject PyFloat_Type
- This instance of PyTypeObject represents the Python floating point type. This is the same object as float in the Python layer.
- int PyFloat_Check(PyObject *p)
- Return true if its argument is a PyFloatObject or a subtype of PyFloatObject.
- int PyFloat_CheckExact(PyObject *p)
- Return true if its argument is a PyFloatObject, but not a subtype of PyFloatObject.
- Create a PyFloatObject object based on the string value in str, or
NULL
on failure.
- PyObject *PyFloat_FromDouble(double v)
- Create a PyFloatObject object from v, or
NULL
on failure.
- double PyFloat_AsDouble(PyObject *pyfloat)
Return a C double representation of the contents of pyfloat. If pyfloat is not a Python floating point object but has a
__float__()
method, this method will first be called to convert pyfloat into a float. If__float__()
is not defined then it falls back to__index__()
. This method returns-1.0
upon failure, so one should call PyErr_Occurred() to check for errors.Changed in version 3.8: Use
__index__()
if available.
- double PyFloat_AS_DOUBLE(PyObject *pyfloat)
- Return a C double representation of the contents of pyfloat, but without error checking.
- PyObject *PyFloat_GetInfo(void)
- Return a structseq instance which contains information about the precision, minimum and maximum values of a float. It’s a thin wrapper around the header file
float.h
.
- double PyFloat_GetMax()
- Return the maximum representable finite float DBL_MAX as C double.
- double PyFloat_GetMin()
- Return the minimum normalized positive float DBL_MIN as C double.
- int PyFloat_ClearFreeList()
- Clear the float free list. Return the number of items that could not be freed.