python的读取csv文件数据

1.基本的读取文件的方式

import csvcsv_reader=csv.reader(open('taxi.csv',encoding='utf-8'))for row in csv_reader:    print(row)#taxi.csv最好放在同一目录下

2.读取文件中的某一列以及多列

import csvwith open('taxi1.csv',encoding='utf-8') as csvfile:    reader=csv.reader(csvfile)    column=[row[2] for row in reader]    print(column)####方法2data_x= pd.read_csv(filepath_or_buffer = 'taxi1.csv', sep = ',')["lo"].valuesdata_y= pd.read_csv(filepath_or_buffer = 'taxi1.csv', sep = ',')["la"].values

3.读取文件的某一行

import csvwith open('taxi1.csv',encoding='utf-8') as csvfile:    reader=csv.reader(csvfile)    for i,rows in enumerate(reader):        if i==0:            row=rows    print(row)###['id', 'dest_no', 'lo', 'la', 'gps_time', 'status', 'speed', 'vehicle_type', 'taxi_no_color', 'dir', 'create_time']

4.读取文件的行数

import csva=open("taxi1.csv","r")b=len(a.readline())print(b)