feat: surface retry param to Table.read_row api (#982)

Author: ayubun

google/cloud/bigtable/table.py

@@ -533,7 +533,7 @@ def get_encryption_info(self):
  for cluster_id, value_pb in table_pb.cluster_states.items()
  }
 
- def read_row(self, row_key, filter_=None):
+ def read_row(self, row_key, filter_=None, retry=DEFAULT_RETRY_READ_ROWS):
  """Read a single row from this table.
 
  For example:
@@ -550,6 +550,14 @@ def read_row(self, row_key, filter_=None):
  :param filter_: (Optional) The filter to apply to the contents of the
  row. If unset, returns the entire row.
 
+ :type retry: :class:`~google.api_core.retry.Retry`
+ :param retry:
+ (Optional) Retry delay and deadline arguments. To override, the
+ default value :attr:`DEFAULT_RETRY_READ_ROWS` can be used and
+ modified with the :meth:`~google.api_core.retry.Retry.with_delay`
+ method or the :meth:`~google.api_core.retry.Retry.with_deadline`
+ method.
+
  :rtype: :class:`.PartialRowData`, :data:`NoneType <types.NoneType>`
  :returns: The contents of the row if any chunks were returned in
  the response, otherwise :data:`None`.
@@ -558,7 +566,9 @@ def read_row(self, row_key, filter_=None):
  """
  row_set = RowSet()
  row_set.add_row_key(row_key)
- result_iter = iter(self.read_rows(filter_=filter_, row_set=row_set))
+ result_iter = iter(
+ self.read_rows(filter_=filter_, row_set=row_set, retry=retry)
+ )
  row = next(result_iter, None)
  if next(result_iter, None) is not None:
  raise ValueError("More than one row was returned.")