(python flask) [已解决] 获取日期形式 URL 然后加减天数，有错误响应 function (ex ":sorry, wrong input Dear customer~")

Question

我正在从 URL 输入中获取日期值，可以加/减天数，显示“这是错误的日期输入，亲爱的客户”，例如下面的输入

输入：
http://.... /data?date=2022-01-01&diff=5&op={add,del}
http://.... /data?date=2022-01-01&diff=13&op=add

期望 output：

差异是：5

日期为：2022-01-01

新日期为：2022-01-14

 from datetime import datetime, timedelta from flask import Flask, request from datetime import date, datetime, time,timedelta # python testcodefmweb_clone.py app = Flask(__name__) @app.route('/data') def query_example(): date = request.args['date'] diff = request.args['diff'] diff_int = int(diff) diff_date = int(date) date_in_system = datetime.strptime( date, "%Y-%m-%d") new_date = date_in_system + datetime.timedelta(days = diff_int) return ''' <h1>The diff is: {}</h1> <h1>The date is: {}</h1> <h1>The new_date is: {}'''.format(diff, date_in_system, new_date) if __name__ == '__main__': # run app in debug mode on port 5000 app.run(debug=True, port=5000)

该网站现在看起来像（new_date 计算不起作用）

python代码图片

我搜索[try] [except]可以帮助显示“这是错误的日期输入，亲爱的客户~”

现在我正在准备将操作添加，删除工作以添加/减去天数，并显示错误输入的错误

 from datetime import datetime, timedelta from flask import Flask, request from datetime import date, datetime, time,timedelta app = Flask(__name__) @app.route('/data') def query_example(): date = request.args['date'] diff = request.args['diff'] diff_int = int(diff) date_in_system = datetime.strptime( date, "%Y-%m-%d") new_date_add = date_in_system + timedelta(days = diff_int ) new_date_minus = date_in_system - timedelta(days = diff_int ) return ''' <h1>The diff is: {}</h1> <h1>The date is: {}</h1> <h1>The new_date_minus is: {}</h1> <h1>The new_date_add is: {}'''.format(diff, date_in_system, new_date_minus,new_date_add) if __name__ == '__main__': # run app in debug mode on port 5000 app.run(debug=True, port=5000)

（图片）网站看起来像

正在努力将[try] [except]用于在代码中显示用户错误“对不起，输入错误亲爱的客户~”

第三个提出[try] [except]该网站无法正常工作
（图片）网站的第三个代码（不工作）

 from datetime import datetime, timedelta from flask import Flask, request from datetime import date, datetime, time,timedelta app = Flask(__name__) @app.route('/data') def query_example(): date = request.args['date'] diff = request.args['diff'] diff_int = int(diff) date_in_system = datetime.strptime( date, "%Y-%m-%d") new_date_add = date_in_system + timedelta(days = diff_int ) new_date_minus = date_in_system - timedelta(days = diff_int ) try: datetime.datetime.strptime(date, "%Y-%m-%d") return ''' <h1>The diff is: {}</h1> <h1>The date is: {}</h1> <h1>The new_date_minus is: {}</h1> <h1>The new_date_add is: {}'''.format(diff, date_in_system, new_date_minus,new_date_add) except ValueError: print("sorry, wrong input for date dear customer~") if __name__ == '__main__': # run app in debug mode on port 5000 app.run(debug=True, port=5000)

解决了！ 看下面的代码

 import datetime from datetime import datetime, timedelta from flask import Flask, request from datetime import date, datetime, time,timedelta app = Flask(__name__) @app.route('/data') def query_example(): try: date = request.args['date'] diff = request.args['diff'] op = request.args.get('op') diff_int = int(diff) date_in_system = datetime.strptime( date, "%Y-%m-%d") new_date_add = date_in_system + timedelta(days = diff_int ) new_date_minus = date_in_system - timedelta(days = diff_int ) final_date = 0 if op == "add": final_date = date_in_system + timedelta(days = diff_int ) if op == "del": final_date = date_in_system - timedelta(days = diff_int ) except Exception as e: return ''' <h1>捕捉錯誤資訊: {}</h1> '''.format(diff+ str(e)) return ''' <h1>The diff is: {}</h1> <h1>The date is: {}</h1> <h1>The op is: {}</h1> <h1>The final_date is: {}'''.format(diff, date_in_system, op, final_date) if __name__ == '__main__': # run app in debug mode on port 5000 app.run(debug=True, port=5000)

（图片）向用户显示输入错误的网站

（图片）正确输入结果的网站

Answer 1

我认为您需要将new_date = date_in_system + datetime.timedelta(days = diff_int)更改为new_date = date_in_system +timedelta(days = diff_int) ，因为您导入timedelta 。

您预期的 output 应该是：

The diff is: 5
The date is: 2022-01-01
The new_date is: 2022-01-06

如果新日期是2022-01-06而不是2022-01-14 ，下面的代码片段应该可以满足您的需求：

from datetime import date,  datetime, timedelta

date = "2022-01-01"
diff_int = 5

date_in_system = datetime.strptime( date,  "%Y-%m-%d")
new_date = date_in_system + timedelta(days = diff_int)

print(new_date)