code: def test_groupby(iris):
      fig, axes = joypy.joyplot(iris, by="Name")
      fig, axes = joypy.joyplot(iris, by="Name", ylim="own")
      fig, axes = joypy.joyplot(iris, by="Name", overlap=3)
  
file_path: joypy/tests/test_joyplot.py
imports: from __future__ import unicode_literals
  import joypy
  import pandas
  import numpy
  from matplotlib import cm
  import pytest
label_desc: Use image node_id 5 for calling a global function with example usage: test_groupby(iris) without return types