Pandas+groupby用法讲解
import pandas as pd import numpy as np 1 2 #导入数据 type_specified={"trip_id":"object","bikeid":"object","from_station_id":"object","to_station_id":"object", "hour":"object","weekday":"object"} ridership=pd.read_csv(r"E:\chicago_bikes_data\txt&csv\ridership_2016.txt", nrows=10000,dtype=type_specified,usecols=range(1,15)) 1 2 3 4 5 ridership.head() 1 trip_id starttime stoptime bikeid tripduration from_station_id from_station_name to_station_id to_station_name usertype gender birthyear hour weekd...
