NameError：名称“请求”未在python中定义

Question

我在python上运行以下代码：

from flask import Flask

 app = Flask(__name__)

 @app.route('/', methods=['GET'])

 def verify():
    if request.args.get("hub.mode") == "subscribe" and request.args.get("hub.challenge"):
        if not request.args.get("hub.verify_token") == 
 os.environ ["VERIFY_TOKEN"]:
            return "Verification token mismatch", 403
        return request.args["hub.challenge"], 200
return "Hello world", 200
if __name__ == "__main__":
    app.run(debug=True)

并得到这个错误：

NameError：未定义名称“请求”

Answer 1

您需要导入flask.request：

from flask import request