Python3 读取csv文件

方法一,panda包读取：

没有安装panda包需要先安装panda包：

pip install pandas

读取csv数据：

import pandas as pd
cased = pd.read_csv('d:/dataname.csv')

若出现错误：UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc8 in position 2: invalid continuation byte

通过修改encoding值进行修改，如下所示：

cased = pd.read_csv('d:/dataname.csv',encoding='gb18030')
cased = pd.read_csv('d:/dataname.csv',encoding='gbk')

方法二,csv包读取：

python3中读取csv文件可以使用csv库，一般是自带的，不需要pip安装

读取csv文件：

import csv
casedata = csv.reader('d:/dataname.csv')

1、获取所有行

import csv
with open('d:/dataname.csv', 'r') as f:
    reader = csv.reader(f)
    print(type(reader))
    for row in reader:
        print(row)

2、获取某一行

with open('d:/dataname.csv', 'r') as f:
    reader = csv.reader(f)
    result = list(reader) 
    print(result[1])

3、获取某一列

import csv
with open('d:/dataname.csv', 'r') as f:
    reader = csv.reader(f)
    for i in reader:
        print(i[0])