Container for the Mersenne Twister PRNG.
RandomState exposes a number of methods for generating random numbers drawn from a variety of probability distributions. In addition to the distributionspecific arguments, each method takes a keyword argument size that defaults to None. If size is None, then a single value is generated and returned. If size is an integer, then a 1D numpy array filled with generated values is returned. If size is a tuple, then a numpy array with that shape is filled and returned.
Parameters:  seed : array_like, int, optional

