版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/roamer314/article/details/71511641
"""
Created on Tue May 9 20:35:45 2017
usecols选取指定列
rename 修改列名
round 指定有效位数
@author: PC
"""
import pandas as pd
data=pd.read_csv(r"D:\datasource\taxi_gps\TaxiRes_2015-05-18.csv",header=None,usecols=[1,2,3,6,7,8])
data=data.rename(columns={1:"start_time",2:"start_lon",3:"start_lat",6:"end_time",7:"end_lon",8:"end_lat"})
data=data.round({'start_lon': 6, 'start_lat': 6, 'end_lon': 6,'end_lat': 6})
data.to_csv(r"D:\datasource\taxi_gps\TaxiGPS_20150518.csv")