Return the fractional and integral parts of an array, element-wise.
The fractional and integral parts are negative if the given number is negative.
| Parameters : | x : array_like 
  | 
|---|---|
| Returns : | y1 : ndarray 
 y2 : ndarray 
  | 
Notes
For integer input the return values are floats.
Examples
>>> np.modf([0, 3.5])
(array([ 0. ,  0.5]), array([ 0.,  3.]))
>>> np.modf(-0.5)
(-0.5, -0)