shape2, loc2, scale2 = rv2.dist._parse_args(*rv2.args, **rv2.kwds)
print('positional and keyword')
print('frozen parameters: shape={}, loc={}, scale={}'.format(shape1, loc1,
    scale1))
print() 
print('positional only')
print('frozen parameters: shape={}, loc={}, scale={}'.format(shape2, loc2,
    scale2))
How to get parameter arguments from a frozen spicy.stats distribution?