Python numpy.finfo()用法及代碼示例

numpy.finfo()函數顯示浮點類型的機器限製。

用法： numpy.finfo(dtype)

參數：
dtype:[float，dtype或instance]要獲取有關其信息的浮點數據類型的種類。
返回：浮點類型的機器參數。

代碼1：

# Python program explaining 
# numpy.finfo() function 
           
# importing numpy as geek  
import numpy as geek  
       
gfg = geek.finfo(geek.float32) 
     
print (gfg)

輸出：

Machine parameters for float32
---------------------------------------------------------------
precision =   6   resolution = 1.0000000e-06
machep =    -23   eps =        1.1920929e-07
negep =     -24   epsneg =     5.9604645e-08
minexp =   -126   tiny =       1.1754944e-38
maxexp =    128   max =        3.4028235e+38
nexp =        8   min =        -max
---------------------------------------------------------------

代碼2：

# Python program explaining 
# numpy.finfo() function 
           
# importing numpy as geek  
import numpy as geek  
       
gfg = geek.finfo(geek.float64) 
     
print (gfg)

輸出：

Machine parameters for float64
---------------------------------------------------------------
precision =  15   resolution = 1.0000000000000001e-15
machep =    -52   eps =        2.2204460492503131e-16
negep =     -53   epsneg =     1.1102230246251565e-16
minexp =  -1022   tiny =       2.2250738585072014e-308
maxexp =   1024   max =        1.7976931348623157e+308
nexp =       11   min =        -max
---------------------------------------------------------------

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