# Based on test_combine_datetlike_udf
df = pd.DataFrame({"A": range(5), "B": range(5)})
df.columns = ["A", "A"]
other = df.copy()
df.iloc[1, :] = None
def combiner(a, b):
return b
>>> df.combine(other, combiner)
AttributeError: 'DataFrame' object has no attribute 'dtype'. Did you mean: 'dtypes'?
Comment From: jbrockmendel
Analogous to #29135