from pandas._libs.tslibs.timestamps import Timestamp
ts = Timestamp("2021-11-11 10:11:34", freq='MS')
print(type(ts))
date_time = ts.to_pydatetime()
print(type(date_time))
两行之间相减
df = pd.Dataframe({"old": [10, 30, 20, 50, 40, 40]})
df['up-down'] = df['old'].diff(-1)
df['down-up'] = df['old'].diff(1)
print(df)
old up-down down-up 0 10 -20.0 NaN 1 30 10.0 20.0 2 20 -30.0 -10.0 3 50 10.0 30.0 4 40 0.0 -10.0 5 40 NaN 0.0
