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# numpy.ma.default_fill_value

ma.default_fill_value(obj)

  Return the default fill value for the argument object.

  The default filling value depends on the datatype of the input array or the type of the input scalar:

  > datatype | default
  > --- | ---
  > bool | True
  > int | 999999
  > float | 1.e20
  > complex | 1.e20+0j
  > object | ‘?’
  > string | ‘N/A’
  > StringDType | ‘N/A’

  For structured types, a structured scalar is returned, with each field the default fill value for its type.

  For subarray types, the fill value is an array of the same size containing the default scalar fill value.

  Parameters:
    obj ndarray, dtype or scalar

      The array data-type or scalar for which the default fill value is returned.

  Returns:
    fill_value scalar

      The default fill value.

  Examples

      >>> import numpy as np
      >>> np.ma.default_fill_value(1)
      999999
      >>> np.ma.default_fill_value(np.array([1.1, 2., np.pi]))
      1e+20
      >>> np.ma.default_fill_value(np.dtype(complex))
      (1e+20+0j)