在 Python 中使用例項獲取浮點數的機器限制資訊
要獲取浮點型別機器限制資訊,請在 Python Numpy 中使用 numpy.finfo() 方法。第一個引數是浮點,即要獲取其資訊的浮點資料型別。
步驟
首先,匯入所需的庫 −
import numpy as np
min 是給定 dtypet 的最小值,max 是給定 dtype 的最小值。
使用例項檢查 float16 型別 −
a = np.finfo(np.float16(12.5))
print("Minimum of float16 type...\n",a.min)
print("Maximum of float16 type...\n",a.max)使用例項檢查 float32 型別 −
b = np.finfo(np.float32(30.5))
print("\nMinimum of float32 type...\n",b.min)
print("Maximum of float32 type...\n",b.max)使用例項檢查 float 型別 −
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)輸出
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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