Add Random Number Generator Docstrings (pytorch#506)

Author: ronrest

torch/__init__.py

@@ -90,18 +90,33 @@ def set_default_tensor_type(t):
 
 
 def set_rng_state(new_state):
+ r"""Sets the random number generator state.
+ 
+ Args:
+ new_state (torch.ByteTensor): The desired state
+ """
  default_generator.set_state(new_state)
 
 
 def get_rng_state():
+ r"""Returns the random number generator state as a ByteTensor."""
  return default_generator.get_state()
 
 
 def manual_seed(seed):
+ r"""Sets the seed for generating random numbers. And returns a 
+ `torch._C.Generator` object.
+ 
+ Args:
+ seed (int or long): The desired seed.
+ """
  return default_generator.manual_seed(seed)
 
 
 def initial_seed():
+ r"""Returns the initial seed for generating random numbers as a 
+ python `long`.
+ """
  return default_generator.initial_seed()