python|python csv实时一条一条插入且表头不重复问题 pythoncsv实时一条一条插入且表

csv实时一条条插入且表头不重复

连续写入txt

csv写入时指定表头

练习

csv实时一条条插入且表头不重复 1、主要就是在最开始插入的时候判断下表头或者表格是否有数据
2、用csv reader（然后主要写是a追加模式，读是r模式）

import csvwith open("111.csv","a",encoding='utf-8',newline="") as f:k = csv.writer(f, dialect="excel")with open("111.csv", "r", encoding='utf-8', newline="") as f:reader = csv.reader(f)if not [row for row in reader]:k.writerow(["标题", "链接", "喜欢"])k.writerow(list)else:k.writerow(list)

all_datas = [[1,2],[2,3],[1,2],[4,5]]for list1 in all_datas:with open(r"ablchange1.csv", 'a+', encoding='utf-8-sig', newline="") as f:k = csv.writer(f, dialect="excel")with open("ablchange1.csv", "r", encoding='utf-8-sig', newline="") as f:reader = csv.reader(f)if not [row for row in reader]:k.writerow(["a","b"])k.writerow(list1)else:k.writerow(list1)

连续写入txt

with open("111.txt","a") as f:for i in range(100000):f.write(str(i)+"\n")if i==9000:break

csv写入时指定表头

import csvwith open('names.csv', 'w') as csvfile:fieldnames = ['first_name', 'last_name']writer = csv.DictWriter(csvfile, fieldnames=fieldnames)writer.writeheader()writer.writerow({'first_name': 'Baked', 'last_name': 'Beans'})writer.writerow({'first_name': 'Lovely', 'last_name': 'Spam'})writer.writerow({'first_name': 'Wonderful', 'last_name': 'Spam'})

练习

with open('specific.csv', 'a', newline="") as csvfile:fieldnames = ['ebayno', "pov", "mpn", "ipn", "opn"]writer = csv.DictWriter(csvfile, fieldnames=fieldnames)writer.writeheader()

file = open("aces_less.csv","w" , newline="")writer = csv.DictWriter(file, fieldnames=["asin","state"])writer.writeheader()for i in range(len(qs)):print(qs[i])state = getDataById(qs[i])print("状态 = " + state + "\n")writer.writerow({"asin":qs[i], "state": state})

【python|python csv实时一条一条插入且表头不重复问题】以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。