python进阶

• 时间

import time

from datetime import datetime as dt

data['timestamp'] = data['OCC_TIM'].apply(lambda x:time.mktime(time.strptime(x,'%Y-%m-%d %H:%M:%S')))

data['OCC_TIM'] = data['timestamp'].apply(lambda x:time.strftime('%Y/%m/%d %H:%M:%S',time.localtime(x)))

 

• 取小数位

round(x,2)

•  dataframe转list

list=np.array(df).tolist()

list=df.values.tolist()