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Python numpy.ma.MaskedArray.tolist()用法及代碼示例

numpy.ma.MaskedArray.tolist()函數將掩碼數組的數據部分作為分層Python列表返回。

用法: numpy.ma.MaskedArray.tolist(fill_value = None)

參數:
axis:[標量,可選]用於無效條目的值。默認為無。

Return :[list]被掩碼數組的Python列表表示形式。

代碼1:



# Python program explaining 
# numpy.ma.MaskedArray.tolist() function 
     
# importing numpy as geek    
# and numpy.ma module as ma   
import numpy as geek   
import numpy.ma as ma 
    
arr = geek.ma.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]], 
                               mask =[0] + [1, 0] * 4) 
   
gfg = arr.tolist() 
   
print (gfg)

輸出:

[[1, None, 3], [None, 5, None], [7, None, 9]]


代碼2:

# Python program explaining 
# numpy.ma.MaskedArray.tolist() function 
     
# importing numpy as geek    
# and numpy.ma module as ma   
import numpy as geek   
import numpy.ma as ma 
    
arr = geek.ma.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]], 
                              mask =[0] + [1, 0] * 4) 
   
gfg = arr.tolist(-999) 
   
print (gfg)

輸出:

[[1, -999, 3], [-999, 5, -999], [7, -999, 9]]



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注:本文由純淨天空篩選整理自sanjoy_62大神的英文原創作品 numpy.ma.MaskedArray.tolist() function – Python。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。