我正在在线学习烧瓶教程，并且正在看有关POST和GET的视频。练习之一是运行简单的表单提交，并在新的@ app.route（）上返回用户名。我尝试添加密码和用户名以尝试模拟登录，因为我认为自己很酷但是失败了。代码如下。
from flask import flask,redirect,url_for,render_template,request
app = flask(__name__)
realUser: str = "name"
realPass: str = "pass"
@app.route("/")
def home():
return render_template("extension.html")
@app.route("/login",methods=["POST","GET"])
def login():
if request.method == "POST":
user = request.form["un"]
password = request.form["password"]
if realUser == user and password == realPass:
return redirect(url_for("user",usr=user))
else:
return render_template("extension.html")
@app.route("/<usr>")
def user(usr):
return f"<h1>{usr}</h1>"
if __name__ == "__main__":
app.run(debug=True)
extension.html：
{% extends "ThePurpleLounge.html" %}
{% block title %}Home Page{% endblock %}
{% block content %}
<h1>Login</h1>
<form method="post">
<p>Name:</p>
<p><input type="text" name="un" /></p>
<p>Password:</p>
<p><input type="text" name="password" /></p>
<p><input type="submit" value="submit" /></p>
</form>
{% endblock %}
ThePurpleLounge.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{% block title %}{% endblock %}</title>
</head>
<body>
{% block content %}
{% endblock %}
</body>
</html>
我什至尝试将代码简化为：
from flask import flask,request
app = flask(__name__)
@app.route("/")
def home():
return render_template("extension.html")
@app.route("/login","GET"])
def login():
if request.method == "POST":
user = request.form["un"]
return redirect(url_for("user",usr=user))
else:
return render_template("extension.html")
@app.route("/<usr>")
def user(usr):
return f"<h1>{usr}</h1>"
if __name__ == "__main__":
app.run(debug=True)
但是，它仍然显示“ 405 Method Not Allowed”。该教程直接进入了代码，因此也许我必须安装或配置一些东西。