Python csv模块使用方法

Posted 2022-09-06 guomeng888

import csv

def openSCV(filename):
    with open("renting.csv",‘r‘,encoding = ‘utf_8_sig‘) as f:
        f_csv = csv.reader(f)
        for row in f_csv:
            print(row)

def Test1():
    headers = [‘ID‘,‘NAME‘,‘Age‘,‘Height‘]
    #表格内容
    rows = [(‘1‘,‘LiLi‘,18,165),(‘2‘,‘Jack‘,20,170),(‘3‘,‘Marry‘,21,168)]
    with open(‘test1.csv‘,‘w‘,encoding=‘utf_8_sig‘) as csvfile:
        spamwriter = csv.writer(csvfile)
        spamwriter.writerow(headers)
        spamwriter.writerows(rows)

def writeDict():
    with open(‘test2.csv‘,‘w‘) as csvfile:
        #创建字段名
        fieldnames = [‘first_name‘,‘last_time‘]
        #创建字段写入对象
        writer = csv.DictWriter(csvfile,fieldnames=fieldnames)
        writer.writeheader()
        #写入表格内容
        writer.writerow(‘first_name‘:‘Baked‘,‘last_time‘:‘Beans‘)
        writer.writerow(‘first_name‘: ‘Baked‘, ‘last_time‘: ‘Beans‘)
        writer.writerow(‘first_name‘: ‘Baked‘, ‘last_time‘: ‘Beans‘)

def readDict():
    with open(‘test2.csv‘,‘r‘) as csvfile:
        #读取文件
        reader = csv.DictReader(csvfile)
        #遍历输入指定字段的内容
        for row in reader:
            print(row[‘first_name‘],row[‘last_time‘])


if __name__ == ‘__main__‘:
    Test1()
    writeDict()
    readDict()