message: add extra document to parameter:num_epochs
diff: @@ -62,7 +62,9 @@ class DatasetDataProvider(data_provider.DataProvider):
  seed=None,
  scope=None):
  """Creates a DatasetDataProvider.
  -
  + Note: if `num_epochs` is not `None`, local counter `epochs` will be created
  + by relevant function. Use `local_variables_initializer()` to initialize
  + local variables.
  Args:
  dataset: An instance of the Dataset class.
  num_readers: The number of parallel readers to use.
  