code: def test_groupby_hist(iris):
      fig, axes = joypy.joyplot(
          iris,
          by="Name",
          column="SepalWidth",
          hist="True",
          bins=20,
          overlap=0,
          grid=True,
          legend=False,
      )
  
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 6 for calling a global function with example usage: test_groupby_hist(iris) without return types