此实例的 PyTypeObject represents the Python floating point type. This is the same object as float and types.FloatType .
返回 True 若其自变量是 PyFloatObject 或子类型的 PyFloatObject .
2.2 版改变： Allowed subtypes to be accepted.
返回 True 若其自变量是 PyFloatObject ，但不是子类型的 PyFloatObject .
2.2 版新增。
创建 PyFloatObject object based on the string value in str ，或 NULL on failure. The pend argument is ignored. It remains only for backward compatibility.
创建 PyFloatObject 对象从 v ，或 NULL 当故障时。
返回 C double representation of the contents of pyfloat 。若 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.
返回 C double representation of the contents of pyfloat , but without error checking.
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 .
2.6 版新增。
Return the maximum representable finite float DBL_MAX as C double .
2.6 版新增。
Return the minimum normalized positive float DBL_MIN as C double .
2.6 版新增。
Clear the float free list. Return the number of items that could not be freed.
2.6 版新增。
Convert the argument v to a string, using the same rules as str() . The length of buf should be at least 100.
This function is unsafe to call because it writes to a buffer whose length it does not know.
Deprecated since version 2.7: 使用 PyObject_Str() or PyOS_double_to_string() 代替。
Same as PyFloat_AsString, except uses the same rules as repr() . The length of buf should be at least 100.
This function is unsafe to call because it writes to a buffer whose length it does not know.
Deprecated since version 2.7: 使用 PyObject_Repr() or PyOS_double_to_string() 代替。
