code: def test_interp_bad_method(self):
      df = DataFrame(
          {
              "A": [1, 2, np.nan, 4],
              "B": [1, 4, 9, np.nan],
              "C": [1, 2, 3, 5],
          }
      )
      msg = (
          r"method must be one of \['linear', 'time', 'index', 'values', "
          r"'nearest', 'zero', 'slinear', 'quadratic', 'cubic', "
          r"'barycentric', 'krogh', 'spline', 'polynomial', "
          r"'from_derivatives', 'piecewise_polynomial', 'pchip', 'akima', "
          r"'cubicspline'\]. Got 'not_a_method' instead."
      )
      with pytest.raises(ValueError, match=msg):
          df.interpolate(method="not_a_method")
  
imports: import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas.errors import ChainedAssignmentError
  import pandas.util._test_decorators
  from pandas import DataFrame, NaT, Series, date_range
  import pandas._testing
label_desc: Use image node_id 7 for calling the TestDataFrameInterpolate obj's underlying member method code with example usage: obj.test_interp_bad_method() without return types