python生成以及打开json、csv和txt文件的实例
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2022-06-21 07:58:26
生成txt文件:
mesg = "hello world"
with open("test.txt", "w") as f:
f.write("{}"....
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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