时间选取、时间划分

import pandas as pd
import numpy as np
df = pd.read_csv(r’…\train.csv’)
print(df.head())
print(df.info())
print(df.describe())
d = pd.to_datetime(df.datetime,format=’%Y-%m-%d %H:%M:%S’).dt
df[‘hour’] = d.hour
print(df.head())