code: def make_period_dataframe(size=10):
      index = _make_period_index(size, "M")
      return _make_dataframe(index, size)
  
imports: from datetime import datetime
  import numpy
  import pandas
  import pyarrow
  from pytest import fixture
  from random import random, randint, choice
  from faker import Faker
label_desc: Use image node_id 6 for calling the Util obj's underlying member method code with example usage: obj.make_period_dataframe(size) and returns: _make_dataframe