浮点数对象¶
-
PyTypeObject
PyFloat_Type¶ This instance of
PyTypeObjectrepresents the Python floating point type. This is the same object asfloatandtypes.FloatType.
-
int
PyFloat_Check(PyObject *p)¶ 当他的参数是一个C类型
PyFloatObject或者是C类型PyFloatObject的子类型时，返回真。在 2.2 版更改: Allowed subtypes to be accepted.
-
int
PyFloat_CheckExact(PyObject *p)¶ 当他的参数是一个C类型
PyFloatObject但不是C类型PyFloatObject的子类型时，返回真。2.2 新版功能.
-
PyObject*
PyFloat_FromString(PyObject *str, char **pend)¶ - Return value: New reference.
Create a
PyFloatObjectobject based on the string value in str, or NULL on failure. The pend argument is ignored. It remains only for backward compatibility.
-
PyObject*
PyFloat_FromDouble(double v)¶ - Return value: New reference.
Create a
PyFloatObjectobject from v, or NULL on failure.
-
double
PyFloat_AsDouble(PyObject *pyfloat)¶ 返回一个代表 pyfloat 内容的C类型
double。如果 float 不是一个Python浮点数对象，但是包含__float__()方法，这个方法会首先被调用，将 pyfloat 转换成一个浮点数。失败时这个方法返回-1.0，所以应该调用C函数PyErr_Occurred()检查错误。
-
PyObject*
PyFloat_GetInfo(void)¶ 返回一个 structseq 实例，其中包含有关 float 的精度、最小值和最大值的信息。 它是头文件
float.h的一个简单包装。2.6 新版功能.
-
double
PyFloat_GetMax()¶ 返回最大可表示的有限浮点数 DBL_MAX 为 C
double。2.6 新版功能.
-
double
PyFloat_GetMin()¶ 返回最小可表示归一化正浮点数 DBL_MIN 为 C
double。2.6 新版功能.
-
int
PyFloat_ClearFreeList()¶ 清空浮点数释放列表。 返回无法释放的项目数。
2.6 新版功能.
-
void
PyFloat_AsString(char *buf, PyFloatObject *v)¶ 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.
2.7 版后已移除: Use
PyObject_Str()orPyOS_double_to_string()instead.
-
void
PyFloat_AsReprString(char *buf, PyFloatObject *v)¶ 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.
2.7 版后已移除: Use
PyObject_Repr()orPyOS_double_to_string()instead.