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numpy.isreal
numpy.isreal(x)[source]- 
    
Returns a bool array, where True if input element is real.
If element has complex type with zero complex part, the return value for that element is True.
- Parameters
 - 
      
xarray_like- 
        
Input array.
 
 - Returns
 - 
      
outndarray, bool- 
        
Boolean array of same shape as
x. 
 
Examples
>>> np.isreal([1+1j, 1+0j, 4.5, 3, 2, 2j]) array([False, True, True, True, True, False]) 
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 https://numpy.org/doc/1.20/reference/generated/numpy.isreal.html