csv

python2 中文乱码解决方法: https://www.cnblogs.com/phyger/p/9561283.html

使用pandas

import pandas
a = {
    "姓名":['张三'],
    "年龄":[23]
}
data = pandas.DataFrame(a) # a需要是字典格式
# mode='a'表示追加, index=True表示给每行数据加索引序号, header=False表示不加标题
data.to_csv("test.csv",mode='a',index=True,header=False,)

import pandas
a = ['张三',23]
data = pandas.DataFrame(data=a) # 
# mode='a'表示追加, index=True表示给每行数据加索引序号, header=False表示不加标题
data.to_csv("test.csv",mode='a',index=True,header=['name', 'age'],)

原文链接：https://blog.csdn.net/weixin_38858749/article/details/117699357

csv操作

 写入

# # w 为写 a 为追加
# # newline='': 这个限定插入新数据不会空行，如果没有这个，每次插入数据都会隔行填数据
# with open("test.csv","a",newline='') as csvfile: 
# 	writer = csv.writer(csvfile)
# 	#先写入columns_name
# 	writer.writerow(["index","a_name","b_name",'xx'])
# 	#写入一行用writerow
# 	writer.writerow([0,1,u"锴傧"])
# 	# 写入多行用writerows
# 	writer.writerows([[11,11,31],[21,21,31],[31,31,41]])

　　

追加

file=open("test.csv",'r',encoding='utf-8')
userlines=file.readlines()
# print (userlines)
file.close()
print (userlines)

with open("test2.csv","w",newline='') as csvfile: 
	writer = csv.writer(csvfile)
	#先写入columns_name
	writer.writerow(["index","a_name","b_name",'xx'])
	writer.writerow([0,1,2,u'zhuij'])

　　

读取

# file=open("test.csv",'r',encoding='utf-8')
# userlines=file.readlines()
# # print (userlines)
# file.close()
# for line in userlines:
# 	username=line.split(',')[0] #读取用户名
# 	dpassword2=line.split(',')[1] #读取密码
# 	password=line.split(',')[2] #读取密码
# 	print(password)

　

不使用with的写法

file=open("test2.csv","w",newline='')
writer = csv.writer(file)
#先写入columns_name
writer.writerow(["index","a_name","b_name",'xx'])
writer.writerow([0,1,2,u'zhuij'])
file.close()