Python numpy.ma.MaskedArray.tolist()函数
numpy.ma.MaskedArray.tolist()函数将屏蔽数组的数据部分作为一个分层的Python列表返回。
语法: numpy.ma.MaskedArray.tolist(fill_value = None)
参数 :
fill_value : [标量,可选] 无效条目使用的值。默认为无。
返回 : [list] 被屏蔽的数组的 Python 列表表示。
代码#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)
输出 :
[[1, None, 3], [None, 5, None], [7, None, 9]]
代码#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)
输出 :
[[1, -999, 3], [-999, 5, -999], [7, -999, 9]]