为什么flask自动调试在ubuntu中不起作用

Question

When I run

python app.py

where content of app.py is:

 from flask import Flask ,render_template

    from data import articles


    app=Flask(__name__)

    Articles=articles()

    @app.route('/')
    def index():
        return render_template('home.html')


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

    @app.route('/articles')
    def articles():
        return render_template('articles.html',articles=Articles)


    @app.route('/article/<string:id>/')
    def article(id):
        return render_template('article.html',id=id)

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

I get the following error:

Traceback (most recent call last):
File "app.py", line 32, in <module>

    app.run(debug=True)

restore_signals, start_new_session)

File "/usr/lib/python3.6/subprocess.py", line 1344, in > _execute_child

  raise child_exception_type(errno_num, err_msg, err_filename)

OSError: [Errno 8] Exec format error:

/home/haseeb/Documents/Flask/flask_web/app.py

Answer 1

To enable debugging for Flask in Ubuntu you can do the following: Set environment variables for Flask:

$ export FLASK_DEBUG=1
$ export app=app.py # change to whatever the filename is

Then run your Flask-app by typing:

$ run flask

From the docs

Answer 2

best Sloution is to use_reloader

if __name__=='__main__':

    app.run(port=5000,debug=True,use_reloader=True)

Answer 3

Indentation matters:

from flask import Flask ,render_template
from data import articles

app=Flask(__name__)

Articles=articles()

@app.route('/')
def index():
    return render_template('home.html')

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

@app.route('/articles')
def articles():
    return render_template('articles.html',articles=Articles)

@app.route('/article/<string:id>/')
def article(id):
    return render_template('article.html',id=id)

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

Answer 4

This worked for me: On terminal before running flask, run the following commands:

$ export FLASK_DEBUG=1
$ export app=app.py 

Then:

flask run