Python 烧瓶 - NameError：未定义名称“app”
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flask - NameError: name 'app' is not defined
提问by Andy K
I'm running Flask through thescript, below (run.py)
我正在通过下面的脚本运行 Flask ( run.py)
#!flask/bin/python
from app import app
app.run(debug=True)
When running the script, I have this traceback
运行脚本时，我有这个回溯
File "./run.py", line 2, in <module>
from app import app
File "/home/andy.kwok/microblog/app/__init__.py", line 11, in <module>
lm.init_app(app)
NameError: name 'app' is not defined
I've tried to add from app import appinto models.py and models.py but it does not work.
我试图添加from app import app到 models.py 和 models.py 中，但它不起作用。
What am I doing wrong?
我究竟做错了什么？
My __init__.py
我的__init__.py
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
import os
from flask.ext.login import LoginManager
from flask.ext.openid import OpenID
from config import basedir
lm= LoginManager()
lm.init_app(app)
oid = OpenID(app,os.path.join(basedir,'tmp'))
lm.login_view = 'login'
app = Flask(__name__)
app.config.from_object('config')
db = SQLAlchemy(app)
from app import views, models
My models.py
我的模型.py
from app import db
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
nickname = db.Column(db.String(64), index=True, unique=True)
email = db.Column(db.String(120), index=True, unique=True)
posts = db.relationship('Post', backref='author', lazy='dynamic')
def is_authenticated(self):
return True
def is_active(self):
return True
def is_anonymous(self):
return False
def get_id(self):
try:
return unicode(self.id) # python 2
except NameError:
return str(self.id) # python 3
def __repr__(self):
return '<User %r>' % (self.nickname)
My views.py
我的意见.py
from flask import render_template, flash, redirect, session, url_for, request, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from app import app
from app import db
from app import lm
from app import oid
from .forms import LoginForm
from .models import User
@app.route('/')
@app.route('/index')
@login_required
def index():
user = g.user
posts = [
{
'author': {'nickname': 'John'},
'body': 'Beautiful day in Portland!'
},
{
'author': {'nickname': 'Susan'},
'body': 'The Avengers movie was so cool!'
}
]
return render_template('index.html',
title='Home',
user=user,
posts=posts)
@app.route('/login', methods=['GET', 'POST'])
@oid.loginhandler
def login():
if g.user is not None and g.user.is_authenticated():
return redirect(url_for('index'))
form = LoginForm()
if form.validate_on_submit():
session['remember_me'] = form.remember_me.data
return oid.try_login(form.openid.data, ask_for=['nickname', 'email'])
return render_template('login.html',
title='Sign In',
form=form,
providers=app.config['OPENID_PROVIDERS'])
@lm.user_loader
def load_user(id):
return User.query.get(int(id))
@oid.after_login
def after_login(resp):
if resp.email is None or resp.email == "":
flash('Invalid login. Please try again.')
return redirect(url_for('login'))
user = User.query.filter_by(email=resp.email).first()
if user is None:
nickname = resp.nickname
if nickname is None or nickname == "":
nickname = resp.email.split('@')[0]
user = User(nickname=nickname, email=resp.email)
db.session.add(user)
db.session.commit()
remember_me = False
if 'remember_me' in session:
remember_me = session['remember_me']
session.pop('remember_me', None)
login_user(user, remember = remember_me)
return redirect(request.args.get('next') or url_for('index'))
@app.before_request
def before_request():
g.user= current_user
采纳答案by lapinktheitroada
You are using the app before importing it, here lm.init_app(app), app is not defined yet.
您在导入之前正在使用该应用程序，这里 lm.init_app(app), app 尚未定义。
It should look like this:
它应该是这样的：
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
import os
from flask.ext.login import LoginManager
from flask.ext.openid import OpenID
from config import basedir
app = Flask(__name__)
app.config.from_object('config')
lm= LoginManager()
lm.init_app(app)
oid = OpenID(app,os.path.join(basedir,'tmp'))
lm.login_view = 'login'
db = SQLAlchemy(app)
from app import views, models
回答by Viraj Wadate
This error is because of you are not defining appand directly using app
这个错误是因为你没有定义应用程序而是直接使用应用程序
Solution is add this line in your code : app Flask(__name__)
解决方案是在您的代码中添加这一行：app Flask(__name__)
Example:app.py
示例：app.py
from flask import Flask
#You need to use following line [app Flask(__name__]
app = Flask(__name__)
@app.route('/')
def index():
return "Hello World with flask"
if __name__ == '__main__':
app.run(port=5000,debug=True)
