아미(아름다운미소)

if result.empty: result = pd.DataFrame(columns=['A', 'C'])

여러컬럼import pandas as pddf = pd.DataFrame({ 'A': ['a', 'a', 'b', 'b', 'c', 'c','x'], 'B': ['x', 'y', 'x', 'y', 'x', 'y','y'], 'C': [10.5, '20', 30.2, 'aaa', '50.1', '60',None], 'D': [1.0, '2', 3.2, 'bbb', 5.1, '6',None]})numeric_cols = ['C', 'D']#방법1df = df.assign(**{col: pd.to_numeric(df[col], errors='coerce').fillna(0).astype(int) for col in numeric_cols})#방법2df[numeric_cols] = df[n..