def IterRows(self, reader):
    line_num = 1
    for columns in reader:
      yield (line_num, columns)
      line_num += 1
Yields a tuple of a line number and row for each row of the CSV data.
dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/bulkload/__init__.py/BulkLoad.IterRows