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Questions tagged [flask]

Flask is a lightweight framework for developing web applications using Python.

Flask is a web application framework for . It has exceptional documentation, a large number of extensions and a friendly community on Discord. It is open source and BSD-3-Clause licensed.

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54068 questions
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4 answers

How to get http headers in flask?

Using Flask, how can I read HTTP headers? I want to check the authorization header which is sent by the client.
emil
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Passing HTML to template using Flask/Jinja2

I'm building an admin for Flask and SQLAlchemy, and I want to pass the HTML for the different inputs to my view using render_template. The templating framework seems to escape the HTML automatically, so all <"'> characters are converted to HTML…
sharvey
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Create dynamic URLs in Flask with url_for()

Half of my Flask routes requires a variable say, //add or //remove. How do I create links to those locations? url_for() takes one argument for the function to route to but I can't add arguments?
Gio Borje
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Can I serve multiple clients using just Flask app.run() as standalone?

I know I can link Flask with Apache or other web servers. But, I was thinking of running Flask as a standalone server serving multiple clients simultaneously. Is this possible? Do I have to handle spawning multiple threads and managing them?
ATOzTOA
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How to divide flask app into multiple py files?

My flask application currently consists of a single test.py file with multiple routes and the main() route defined. Is there some way I could create a test2.py file that contains routes that were not handled in test.py? @app.route('/somepath') def…
Rolando
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Python Flask, how to set content type

I am using Flask and I return an XML file from a get request. How do I set the content type to xml ? e.g. @app.route('/ajax_ddl') def ajax_ddl(): xml = 'foo' header("Content-type: text/xml") return xml
Tampa
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How do I get the different parts of a Flask request's url?

I want to detect if the request came from the localhost:5000 or foo.herokuapp.com host and what path was requested. How do I get this information about a Flask request?
Dogukan Tufekci
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Typical AngularJS workflow and project structure (with Python Flask)

I am pretty new to this whole MV* client-side framework frenzy. It doesn't have to be AngularJS, but I picked it because it feels more natural to me than either Knockout, Ember or Backbone. Anyway what is the workflow like? Do people start with…
Sahat Yalkabov
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What are Flask Blueprints, exactly?

I have read the official Flask documentation on Blueprints and even one or two blog posts on using them. I've even used them in my web app, but I don't completely understand what they are or how they fit into my app as a whole. How is it similar to…
JoshieSimmons
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Flask raises TemplateNotFound error even though template file exists

I am trying to render the file home.html. The file exists in my project, but I keep getting jinja2.exceptions.TemplateNotFound: home.html when I try to render it. Why can't Flask find my template? from flask import Flask, render_template app =…
Srdan Ristic
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How to delete a record by id in Flask-SQLAlchemy

I have users table in my MySql database. This table has id, name and age fields. How can I delete some record by id? Now I use the following code: user = User.query.get(id) db.session.delete(user) db.session.commit() But I don't want to make any…
Sergey
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When should Flask.g be used?

I saw that g will move from the request context to the app context in Flask 0.10, which made me confused about the intended use of g. My understanding (for Flask 0.9) is that: g lives in the request context, i.e., created afresh when the requests…
Yaniv Aknin
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How to debug a Flask app

How are you meant to debug errors in Flask? Print to the console? Flash messages to the page? Or is there a more powerful option available to figure out what's happening when something goes wrong?
Kimmy
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How to enable CORS in flask

I am trying to make a cross origin request using jquery but it keeps being reject with the message XMLHttpRequest cannot load http://... No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin ... is therefore not…
Lopes
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Return HTTP status code 201 in flask

We're using Flask for one of our API's and I was just wondering if anyone knew how to return a HTTP response 201? For errors such as 404 we can call: from flask import abort abort(404) But for 201 I get LookupError: no exception for 201 Do I need…
ingh.am
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