error while using Numpy Random function (np.random.random_integers)

You missed out on the second comma while passing arguments to np.random.random_integers (here: (100(3,4))), so it assumes 100 is a function to which you're passing arguments 3 and 4, which is not the case as 100 is an integer.

Change

np.random.random_integers(50, 100(3,4))

to

np.random.random_integers(50, 100, (3, 4))

xx=np.random.random_integers(50,100(3,4))

please suggest alternative

As an alternative I suggest to insert the missing comma:

xx = np.random.random_integers(50, 100, (3, 4))