code: def test_bxp(self):
      mpl.rcParams["date.converter"] = "concise"
      fig, ax = plt.subplots()
      data = [
          {
              "med": datetime.datetime(2020, 1, 15),
              "q1": datetime.datetime(2020, 1, 10),
              "q3": datetime.datetime(2020, 1, 20),
              "whislo": datetime.datetime(2020, 1, 5),
              "whishi": datetime.datetime(2020, 1, 25),
              "fliers": [
                  datetime.datetime(2020, 1, 3),
                  datetime.datetime(2020, 1, 27),
              ],
          }
      ]
      ax.bxp(data, vert=False)
      ax.xaxis.set_major_formatter(mpl.dates.DateFormatter("%Y-%m-%d"))
      ax.set_title("Box plot with datetime data")
  
imports: import datetime
  import numpy
  import pytest
  import matplotlib.pyplot
  import matplotlib
label_desc: Use image node_id 14 for calling the TestDatetimePlotting obj's underlying member method code with example usage: obj.test_bxp() without return types