按着 flask 教程一步一步的走,报错..求指导...

[knowaeap]

教程地址:http://docs.jinkan.org/docs/flask/tutorial/dbinit.html#tutorial-dbinit

2 from contextlib import closing
3 import sqlite3
4 from flask import Flask, request, session, g, redirect, url_for, \
5 abort, render_template, flash
6 # configuration
7 DATABASE = '/tmp/flaskr.db'
8 DEBUG = True
9 SECRET_KEY = 'development key'
10 USERNAME = 'admin'
11 PASSWORD = 'default'
12 # create our little application :)
13 app = Flask(__name__)
14 app.config.from_envvar('FLASKR_SETTINGS', silent=True)
15 def connect_db():
16 return sqlite3.connect(app.config['DATABASE'])
17 def init_db():
18 with closing(connect_db()) as db:
19 with app.open_resource('schema.sql') as f:
20 db.cursor().executescript(f.read())
21 db.commit()
22 if __name__ == '__main__':
23 app.run()
-----------------------------
报错:
>>> from flaskr import init_db
>>> init_db()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "flaskr.py", line 18, in init_db
with closing(connect_db()) as db:
File "flaskr.py", line 16, in connect_db
return sqlite3.connect(app.config['DATABASE'])
KeyError: 'DATABASE'

[casparchen]

replace the following line:
app.config.from_envvar('FLASKR_SETTINGS', silent=True)
to:
app.config.from_object(__name__)
Because you write all code in one single file. I don't know why you use from_envvar.

[knowaeap]

thank you very much ... I use from_envvar because I don't know what's meaning...

[knowaeap]

@casparchen thank you very much ... I use from_envvar because I don't know what's meaning...