Question

发现很难解决这个基本问题。我正在使用python 2.7.10来跟踪使用python 3.4提供的烧瓶教程。我知道这两个版本之间存在一些差异，但似乎知识还不足以克服这种情况。我有python的业余级经验。感觉它与类定义有关，但无法确定它。是的，我经历了类似错误的解决方案，但无法将解决方案与我的问题联系起来。

Traceback (most recent call last):
  File "manage.py", line 5, in <module>
    from flask_init import app
  File "/Users/sapp/Desktop/ude/flask_init/__init__.py", line 12, in <module>
    from author import views
  File "/Users/sapp/Desktop/ude/flask_init/author/views.py", line 3, in     <module>
    from form import RegisterForm
   File "/Users/sapp/Desktop/ude/flask_init/author/form.py", line 5, in <module>
    class RegisterForm(form):
TypeError: Error when calling the metaclass bases
module.__init__() takes at most 2 arguments (3 given)

我的目录结构：

├── __init__.py
├── __init__.pyc
├── author
│   ├── __init__.py
│   ├── __init__.pyc
│   ├── form.py
│   ├── form.pyc
│   ├── models.py
│   ├── models.pyc
│   ├── views.py
│   └── views.pyc
├── blog
│   ├── __init__.py
│   ├── __init__.pyc
│   ├── views.py
│   └── views.pyc
├── manage.py
├── requirements.txt
├── settings.py
├── settings.pyc
├── templates
│   ├── author
│   └── base.html
└── venv
    ├── bin
    ├── include
    ├── lib
    └── pip-selfcheck.json

manage.py：

import os, sys

from flask_script import Manager, Server
from flask_init import app

manager = Manager(app)

manager.add_command("runserver", Server(
    do something
    ))

if __name__ == "__main__":
    manager.run()

form.py：

from flask_wtf import form
from wtforms import validators, StringField, PasswordField
from wtforms.fields.html5 import EmailField

class RegisterForm(form):
    pass

init.py：

from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config.from_object('settings')
db = SQLAlchemy(app)
import blog.views
from author import views

views.py：

from flask_init import app
from flask import render_template, redirect
from form import RegisterForm

@app.route('/register', method=('GET', 'POST'))
def register():
    form = RegisterForm()
    return render_template('author/register.html', form=form)

我选择不使用wtforms标记，因为我更关心的是2.7和3.4之间的元类，我更缺少什么。

Answer 1

这与Python版本无关。

你在form.py中导入了错误的东西;您有form而不是Form。前者是一个模块，后者是类，这是你应该继承的。

调用元类库时出错

1 个答案: