转载:python生成以及打开json、csv和txt文件

原文地址：https://blog.csdn.net/weixin_42555131/article/details/82012642

生成txt文件：

mesg = "hello world"

with open("test.txt", "w") as f: f.write("{}".format(mesg)) print("加载完成！")

生成json文件：

import json


mesg = {"key": "value"}

with open("test.json", "w") as f: json.dump(mesg, f) print("加载完成！")

生成csv文件：

import csv


with open("test.csv", "w") as f: fieldnames = ["name", "age"] # 表的列名 writer = csv.DictWriter(f, fieldnames=fieldnames) writer.writeheader() # 加上表头 writer.writerow({"name": "shannon-li", "age": 4}) # 按行添加 print("加载完成！")

打开txt文件：

with open("test.txt") as f:
    content = f.read()
    print("文件内容：{}".format(content))

打开json文件：

import json
import sys


with open("test.json") as f: try: content = json.load(f) print("文件内容：{}".format(content)) except TypeError: sys.exit("Error on load json file.")

打开csv文件：

import csv
import sys

content = []

with open("test.csv") as f: reader = csv.DictReader(f, delimiter=",", quotechar="|") try: for row in reader: content.append({"name": row["name"], "age": row["age"]}) print("文件内容：".format(content)) except csv.Error as e: sys.exit("file %s, line %d: %s" % (f, reader.line_num, e))

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