Html 重定向时发生Flask错误：TypeError:_init__;（）接受1到2个位置参数，但给出了3个

我是一个烧瓶里的新手，我在youtube上通过一个教程学习它。如果我运行下面的代码并转到浏览器，它工作得很好，但是只要我想重定向网页，就会出现错误。代码如下：

from flask import Flask, render_template, url_for, flash, redirect
from forms import RegistrationForm, LoginForm

app = Flask(__name__)

app.config['SECRET_KEY'] = '765bb2ad427608c76640cbec522eb8c2'

posts = [
    {
        'author': 'Takunda Mafuta',
        'title': 'Blog Post 1',
        'content': 'Content 1',
        'date_posted': '19 Jan 2020'
    },
    {
        'author': 'Thelma Mafuta',
        'title': 'Blog Post 2',
        'content': 'Content 2',
        'date_posted': '18 Jan 2020'
    }
]


@app.route('/')
@app.route('/home')
def home():
    return render_template('home.html', posts=posts)


@app.route('/about')
def about():
    return render_template('about.html', title='about')


@app.route("/register", methods=['GET', 'POST'])
def register():
    form = RegistrationForm()
    if form.validate_on_submit():
        flash(f'Account created for {form.username.data}!', 'success')
        return redirect(url_for('home'))
    return render_template('register.html', title='Register', form=form)


@app.route('/login')
def login():
    form = LoginForm()
    return render_template('login.html', title='Login', form=form)


if __name__ == '__main__':
    app.run(debug=True)

TypeError
TypeError: __init__() takes from 1 to 2 positional arguments but 3 were given

Traceback (most recent call last)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 2463, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 2449, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1866, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\Takunda Mafuta\Videos\lgT Personal Development\Data Science\Python\Tutorials\Flask Web Development\Flask-Demo\FlaskBlog\FlaskBlog.py", line 38, in register
if form.validate_on_submit():
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\flask_wtf\form.py", line 101, in validate_on_submit
return self.is_submitted() and self.validate()
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\form.py", line 310, in validate
return super(Form, self).validate(extra)
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\form.py", line 152, in validate
if not field.validate(self, extra):
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\fields\core.py", line 206, in validate
stop_validation = self._run_validation_chain(form, chain)
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\fields\core.py", line 226, in _run_validation_chain
validator(form, self)
TypeError: __init__() takes from 1 to 2 positional arguments but 3 were given
The debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error.
To switch between the interactive traceback and the plaintext one, you can click on the "Traceback" headline. From the text traceback you can also create a paste of it. For code execution mouse-over the frame you want to debug and click on the console icon on the right side.

You can execute arbitrary Python code in the stack frames and there are some extra helpers available for introspection:

dump() shows all variables in the frame
dump(obj) dumps all that's known about the object

错误如下：

from flask import Flask, render_template, url_for, flash, redirect
from forms import RegistrationForm, LoginForm

app = Flask(__name__)

app.config['SECRET_KEY'] = '765bb2ad427608c76640cbec522eb8c2'

posts = [
    {
        'author': 'Takunda Mafuta',
        'title': 'Blog Post 1',
        'content': 'Content 1',
        'date_posted': '19 Jan 2020'
    },
    {
        'author': 'Thelma Mafuta',
        'title': 'Blog Post 2',
        'content': 'Content 2',
        'date_posted': '18 Jan 2020'
    }
]


@app.route('/')
@app.route('/home')
def home():
    return render_template('home.html', posts=posts)


@app.route('/about')
def about():
    return render_template('about.html', title='about')


@app.route("/register", methods=['GET', 'POST'])
def register():
    form = RegistrationForm()
    if form.validate_on_submit():
        flash(f'Account created for {form.username.data}!', 'success')
        return redirect(url_for('home'))
    return render_template('register.html', title='Register', form=form)


@app.route('/login')
def login():
    form = LoginForm()
    return render_template('login.html', title='Login', form=form)


if __name__ == '__main__':
    app.run(debug=True)

TypeError
TypeError: __init__() takes from 1 to 2 positional arguments but 3 were given

Traceback (most recent call last)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 2463, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 2449, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1866, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\Takunda Mafuta\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\flask\app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\Takunda Mafuta\Videos\lgT Personal Development\Data Science\Python\Tutorials\Flask Web Development\Flask-Demo\FlaskBlog\FlaskBlog.py", line 38, in register
if form.validate_on_submit():
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\flask_wtf\form.py", line 101, in validate_on_submit
return self.is_submitted() and self.validate()
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\form.py", line 310, in validate
return super(Form, self).validate(extra)
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\form.py", line 152, in validate
if not field.validate(self, extra):
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\fields\core.py", line 206, in validate
stop_validation = self._run_validation_chain(form, chain)
File "C:\Users\Takunda Mafuta\AppData\Roaming\Python\Python38\site-packages\wtforms\fields\core.py", line 226, in _run_validation_chain
validator(form, self)
TypeError: __init__() takes from 1 to 2 positional arguments but 3 were given
The debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error.
To switch between the interactive traceback and the plaintext one, you can click on the "Traceback" headline. From the text traceback you can also create a paste of it. For code execution mouse-over the frame you want to debug and click on the console icon on the right side.

You can execute arbitrary Python code in the stack frames and there are some extra helpers available for introspection:

dump() shows all variables in the frame
dump(obj) dumps all that's known about the object

注册表格代码：

列表项

（A） forms.py

（B） register.html

{% extends "layout.html" %}
{% block content %}
            <div class="content-section">
                <form method="POST" action="">
                    {{ form.hidden_tag() }}
                    <fieldset class="form-group">
                        <legend class="border-bottom mb-4">Join Today</legend>
                        <div class="form-group">
                            {{ form.username.label(class="form-control-label") }}
                            {{ form.username(class="form-control form-control-lg") }}
                        </div>
                        <div class="form-group">
                            {{ form.email.label(class="form-control-label") }}
                            {{ form.email(class="form-control form-control-lg") }}
                        </div>
                        <div class="form-group">
                            {{ form.password.label(class="form-control-label") }}
                            {{ form.password(class="form-control form-control-lg") }}
                        </div>
                        <div class="form-group">
                            {{ form.confirm_password.label(class="form-control-label") }}
                            {{ form.confirm_password(class="form-control form-control-lg") }}
                        </div>
                    </fieldset>
                    <div class="form-group">
                        {{ form.submit(class="btn btn-outline-info") }}
                    </div>
                </form>
            </div>
            <div class="border-top pt-3">
                <small class="text-muted">
                    Already Have An Account? <a class="ml-2" href="{{ url_for('login') }}">Sign In</a>
                </small>
            </div>
{% endblock content %}

{%extends“layout.html”%}
{%block content%}
{{form.hidden_tag（）}}
今天加入
{{form.username.label（class=“form control label”）}
{{form.username（class=“form control form control lg”）}
{{form.email.label（class=“form control label”）}
{{form.email（class=“form control form control lg”）}
{{form.password.label（class=“form control label”）}
{{form.password（class=“form control form control lg”）}
{{form.confirm_password.label（class=“form control label”）}
{{form.confirm_password（class=“form control form control lg”）}
{{form.submit（class=“btn btn outline info”）}
已经有账户了吗？
{%endblock内容%}

我不确定这是否是错误的来源：似乎没有从flask导入重定向的选项，而是从django.shortcuts和werkzeug.utils导入重定向。请参阅所附图片。

---

您能否添加您的

注册表单

代码，这似乎是验证失败的地方。错误似乎来自提交时的验证（）：错误似乎来自表单。提交时的验证（）：。如果我使用form.is_submitted（）：它可以工作，但是EqualTo验证器没有像我预期的那样工作，因为它甚至允许密码和确认_密码不匹配的密码。请提供帮助。当您向所有验证程序添加括号时，结果是否会改变？e、 g.

DataRequired（）

？