在 Python 中使用实例获取浮点数的机器限制信息
要获取浮点类型机器限制信息,请在 Python Numpy 中使用 numpy.finfo() 方法。第一个参数是浮点,即要获取其信息的浮点数据类型。
步骤
首先,导入所需的库 −
import numpy as np
min 是给定 dtypet 的最小值,max 是给定 dtype 的最小值。
使用实例检查 float16 类型 −
a = np.finfo(np.float16(12.5)) print("Minimum of float16 type...\n",a.min) print("Maximum of float16 type...\n",a.max)
使用实例检查 float32 类型 −
b = np.finfo(np.float32(30.5)) print("\nMinimum of float32 type...\n",b.min) print("Maximum of float32 type...\n",b.max)
使用实例检查 float 类型 −
c = np.finfo(np.float64(55.9)) print("\nMinimum of float64 type...\n",c.min) print("Maximum of float64 type...\n",c.max)
示例
import numpy as np # To get the machine limits information for float types, use the numpy.finfo() method in Python Numpy # The first parameter is the float i.e. the kind of float data type to get information about. # Checking for float16 type with instances # The min is the minimum value of given dtype. # The max is the minimum value of given dtype. a = np.finfo(np.float16(12.5)) print("Minimum of float16 type...\n",a.min) print("Maximum of float16 type...\n",a.max) # Checking for float32 type with instances b = np.finfo(np.float32(30.5)) print("\nMinimum of float32 type...\n",b.min) print("Maximum of float32 type...\n",b.max) # Checking for float type with instances c = np.finfo(np.float64(55.9)) print("\nMinimum of float64 type...\n",c.min) print("Maximum of float64 type...\n",c.max)
输出
Minimum of float16 type... -65500.0 Maximum of float16 type... 65500.0 Minimum of float32 type... -3.4028235e+38 Maximum of float32 type... 3.4028235e+38 Minimum of float64 type... -1.7976931348623157e+308 Maximum of float64 type... 1.7976931348623157e+308
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