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840 votes
24 answers
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So this is embarrassing. I've got an application that I threw together in Flask and for now it is just serving up a single static HTML page with some links to CSS and JS. And I can't find where in the ...
hughdbrown's user avatar
  • 49.2k
176 votes
5 answers
96k views

In my application, the state of a common object is changed by making requests, and the response depends on the state. class SomeObj(): def __init__(self, param): self.param = param def ...
sayantankhan's user avatar
  • 2,281
124 votes
2 answers
402k views

I have the code below in my Python script: def cmd_wui(argv, path_to_tx): """Run a web UI.""" from flask import Flask, flash, jsonify, render_template, request import webbrowser app = ...
Mpampinos Holmens's user avatar
  • 1,937
520 votes
13 answers
920k views

I'm trying to build a simple API using Flask, in which I now want to read some POSTed JSON. I do the POST with the Postman Chrome extension, and the JSON I POST is simply {"text":"hello ...
kramer65's user avatar
  • 54.5k
80 votes
3 answers
57k views

Setting up Flask with uWSGI and Nginx can be difficult. I tried following this DigitalOcean tutorial and still had trouble. Even with buildout scripts it takes time, and I need to write instructions ...
culebrón's user avatar
  • 36.9k
136 votes
2 answers
228k views

How do you use url_for in Flask to reference a file in a folder? For example, I have some static files in the static folder, some of which may be in subfolders such as static/bootstrap. When I try ...
user1431282's user avatar
  • 6,925
258 votes
19 answers
395k views

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? ...
Srdjan Ristic's user avatar
  • 3,553
10 votes
3 answers
10k views

I am trying to pass data as JSON from a Flask route to a Jinja template rendering JavaScript. I want to iterate over the data using JavaScript. The browser shows SyntaxError: Unexpected token '&'...
EspenG's user avatar
  • 537
47 votes
2 answers
89k views

Suppose I have following case; @app.route('/a', methods=['GET']) def a(): a = numpy.ones([10,10]) ... return render_template(...) # this rendered page has a link to /b @app.route('/b', methods=...
erogol's user avatar
  • 13.7k
23 votes
1 answer
21k views

I have a route defined like this: @app.route('/magic/<filename>') def moremagic(filename): pass And now in a template I want to call that route using url_for() like so: <h1>you ...
user avatar
29 votes
3 answers
32k views

I have a view that generates data and streams it in real time. I can't figure out how to send this data to a variable that I can use in my HTML template. My current solution just outputs the data to ...
JeffThompson's user avatar
  • 1,620
13 votes
1 answer
18k views

I have created a FastAPI endpoint, as shown below: @app.post("/report/upload") def create_upload_files(files: UploadFile = File(...)): try: with open(files.filename,'wb+') as wf: ...
user3656746's user avatar
  • 131
121 votes
7 answers
432k views

I want to know the correct way to start a flask application. The docs show two different commands: $ flask -a sample run and $ python3.4 sample.py produce the same result and run the application ...
KarateKid's user avatar
  • 3,446
8 votes
2 answers
12k views

I have an HTML form that gets posted to a Flask route. However, request.form is empty. If I try to access one of the values by id, I get a 400 error. How do I post values from an HTML form and ...
user avatar
162 votes
9 answers
273k views

My app makes a call to an API that returns a dictionary. I want to pass information from this dict to JavaScript in the view. I am using the Google Maps API in the JS, specifically, so I'd like to ...
mea's user avatar
  • 1,623
343 votes
10 answers
484k views

How do you execute raw SQL in SQLAlchemy? I have a python web app that runs on flask and interfaces to the database through SQLAlchemy. I need a way to run the raw SQL. The query involves multiple ...
starwing123's user avatar
  • 3,543
336 votes
13 answers
334k views

I'm making a website where users can log on and download files, using the Flask micro-framework (based on Werkzeug) which uses Python (2.6 in my case). I need to get the IP address of users when they ...
Jon Cox's user avatar
  • 11k
104 votes
1 answer
89k views

I am getting working outside of request context when trying to access session in a test. How can I set up a context when I'm testing something that requires one? import unittest from flask import ...
Cory's user avatar
  • 15.7k
168 votes
8 answers
217k views

I am writing my first flask application. I am dealing with file uploads, and basically what I want is to read the data/content of the uploaded file without saving it and then print it on the resulting ...
user2480542's user avatar
  • 2,955
372 votes
11 answers
761k views

I'm trying to do the equivalent of Response.redirect as in C# - i.e.: redirect to a specific URL - how do I go about this? Here is my code: import os from flask import Flask app = Flask(__name__) @...
iJade's user avatar
  • 23.9k
140 votes
15 answers
202k views

I'm trying to jsonify a SQLAlchemy result set in Flask/Python. The Flask mailing list suggested the following method http://librelist.com/browser//flask/2011/2/16/jsonify-sqlalchemy-pagination-...
mal-wan's user avatar
  • 4,486
23 votes
5 answers
25k views

I'm running my Flask application with uWSGI and nginx. There's a 500 error, but the traceback doesn't appear in the browser or the logs. How do I log the traceback from Flask? uwsgi --http-socket ...
Phil Cote's user avatar
  • 417
244 votes
5 answers
243k views

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's user avatar
  • 3,128
184 votes
20 answers
237k views

My response back from MongoDB after querying an aggregated function on document using Python, It returns valid response and i can print it but can not return it. Error: TypeError: ObjectId('...
Irfan's user avatar
  • 5,122
104 votes
3 answers
155k views

I'm busy writing a small game server to try out flask. The game exposes an API via REST to users. It's easy for users to perform actions and query data, however I'd like to service the "game ...
Marinus's user avatar
  • 2,220

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