Return random integers from low (inclusive) to high (exclusive).
Return random integers from the “discrete uniform” distribution in the “halfopen” interval [low, high). If high is None (the default), then results are from [0, low).
Parameters :  low : int
high : int, optional
size : int or tuple of ints, optional


Returns :  out : int or ndarray of ints

See also
Examples
>>> np.random.randint(2, size=10)
array([1, 0, 0, 0, 1, 1, 0, 0, 1, 0])
>>> np.random.randint(1, size=10)
array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
Generate a 2 x 4 array of ints between 0 and 4, inclusive:
>>> np.random.randint(5, size=(2, 4))
array([[4, 0, 2, 1],
[3, 2, 2, 0]])