code: def test_subplot_titles_too_much(self, iris):
      df = iris.drop("Name", axis=1).head()
      # Use the column names as the subplot titles
      title = list(df.columns)
      # Case len(title) > len(df)
      msg = (
          "The length of `title` must equal the number of columns if "
          "using `title` of type `list` and `subplots=True`"
      )
      with pytest.raises(ValueError, match=msg):
          df.plot(subplots=True, title=title + ["kittens > puppies"])
  
imports: import os
  import numpy
  import pytest
  import pandas.util._test_decorators
  from pandas import DataFrame, Index, Series, Timestamp, date_range, interval_range, period_range, plotting, read_csv
  import pandas._testing
  from pandas.tests.plotting.common import _check_colors, _check_legend_labels, _check_plot_works, _check_text_labels, _check_ticks_props
label_desc: Use image node_id 17 for calling the TestDataFramePlots obj's underlying member method code with example usage: obj.test_subplot_titles_too_much(iris) without return types