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）
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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) |
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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
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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
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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
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with open('specific.csv', 'a', newline="") as csvfile: fieldnames = ['ebayno', "pov", "mpn", "ipn", "opn"] writer = csv.DictWriter(csvfile, fieldnames=fieldnames) writer.writeheader() |
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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}) |
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服务器之家。
原文链接：https://blog.csdn.net/weixin_42357472/article/details/85069034
