code: def test_lognorm(CFR):
      zmask = CFR["ratio"] > 0
      labels = CFR["date"].unique()
      for i in range(1, len(labels)):
          if labels[i].split("-")[2] != "01":
              labels[i] = None
      fig, axes = joypy.joyplot(
          CFR[zmask],
          by="date",
          column="ratio",
          labels=labels,
          kind="lognorm",
          range_style="own",
          tails=0.1,
          overlap=4,
          x_range=[0.0, 0.061],
          grid="y",
          linewidth=0.25,
          figsize=(6.5, 9.0),
          title="Case Fatality Ratio",
          colormap=cm.Blues_r,
          ylim="own",
          normalize=True,
          floc=None,
      )
  
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 10 for calling a global function with example usage: test_lognorm(CFR) without return types