x
import pandas as pddata = { "age": [50, 40, 30, 40, 20, 10, 30], "qualified": [True, False, False, False, False, True, True]}df = pd.DataFrame(data)newdf = df.where(df["age"] > 30)print(newdf)age qualified 0 50.0 1.0 1 40.0 0.0 2 NaN NaN 3 40.0 0.0 4 NaN NaN 5 NaN NaN 6 NaN NaN