numpy.ma.MaskedArray class
is a subclass of ndarray for manipulating numeric arrays with missing data. With Numpy MaskedArray .__ sub__ we can subtract a specific value that is provided as a parameter in the MaskedArray .__ sub __ () method. The value will be subtracted from each item in the numpy array.
Syntax: numpy.MaskedArray .__ sub__
Return: Subtract others from self, and return a new masked array.
Example # 1:
In this example, we see that each element of the array is subtracted from the value specified as a parameter in the MaskedArray .__ sub __ () method. Remember one thing, this will not work for double type values.

Exit:
[6 17 18 19 20]Example # 2:

Output:
[[16 17 18 19 20] [21 20 19 18 17]]
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