Python 3.6.5 Documentation >  Floating Point Objects

Floating Point Objects
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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".

PyObject* PyFloat_FromString(PyObject *str)
*Return value: New reference.*

Create a "PyFloatObject" object based on the string value in *str*,
or *NULL* on failure.

PyObject* PyFloat_FromDouble(double v)
*Return value: New reference.*

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. This method returns "-1.0" upon failure, so
one should call "PyErr_Occurred()" to check for errors.

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.