flask | The Python micro framework for building web applications | Web Framework library
kandi X-RAY | flask Summary
kandi X-RAY | flask Summary
The Python micro framework for building web applications.
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Top functions reviewed by kandi - BETA
- Generate a URL for an endpoint
- Inject url defaults
- Handles URL build errors
- Create a URL adapter
- Add a url rule
- Defines a GET rule
- Creates a route for a method
- Register this blueprint
- Creates a blueprint setup state
- Serialize obj to fp
- Copy the current request context
- Handle registration
- Return a logger instance
- Handle login
- Create a new blog
- Add a before_first_request function to the blueprint
- Callback to load an env file
- Deprecated
- Returns a response object
- Create a config object
- Run command
- Create a JSON response
- Create a route callable
- Saves a session
- Create a flask app
- Run shell
flask Key Features
flask Examples and Code Snippets
Lines of Code : 4License : Permissive (MIT)
CopyHello, World from Flask!
{
"message": "Hello World"
}
Hello, World from Flask!
{
"message": "Hello World"
}
Have a simple and easy to use routing system.
import functools
from flask import Blueprint
from flask import flash
from flask import g
from flask import redirect
from flask import render_template
from flask import request
from flask import session
from flask import url_for
from werkzeug.securit import pytest
from flaskr.db import get_db
def test_index(client, auth):
response = client.get("/")
assert b"Log In" in response.data
assert b"Register" in response.data
auth.login()
response = client.get("/")
assert b"tes import pytest
from flask import g
from flask import session
from flaskr.db import get_db
def test_register(client, app):
# test that viewing the page renders without template errors
assert client.get("/auth/register").status_code == 200
Lines of Code : 5License : Strong Copyleft (CC BY-SA 4.0)Copygunicorn -w 4 --threads 100 -b 0.0.0.0:5000 your_project:app
pip install gevent
gunicorn -w 4 -k gevent --worker-connections 1000 -b 0.0.0.0:5000 your_project:app
def verified():
print('verified')
return False
def redirect():
print('redirect')
def verify(func):
if verified():
return func
else:
return redirect
@verify
def myfunc():
print('myfunc')
myfunc()
@socketio.on('receiver')
def message_server(msg):
/* Do something here */
/* You need to load socketio, you can look it up at socket.io, the link above also have instructions */
let socket =&nbCommunity Discussions
Trending Discussions on flask
QUESTION
I am trying to get a Flask and Docker application to work but when I try and run it using my docker-compose up command in my Visual Studio terminal, it gives me an ImportError called ImportError: cannot import name 'json' from itsdangerous. I have tried to look for possible solutions to this problem but as of right now there are not many on here or anywhere else. The only two solutions I could find are to change the current installation of MarkupSafe and itsdangerous to a higher version: https://serverfault.com/questions/1094062/from-itsdangerous-import-json-as-json-importerror-cannot-import-name-json-fr and another one on GitHub that tells me to essentially change the MarkUpSafe and itsdangerous installation again https://github.com/aws/aws-sam-cli/issues/3661, I have also tried to make a virtual environment named veganetworkscriptenv to install the packages but that has also failed as well. I am currently using Flask 2.0.0 and Docker 5.0.0 and the error occurs on line eight in vegamain.py.
Here is the full ImportError that I get when I try and run the program:
...ANSWER
Answered 2022-Feb-20 at 12:31I was facing the same issue while running docker containers with flask.
I downgraded Flask to 1.1.4 and markupsafe to 2.0.1 which solved my issue.
Check this for reference.
QUESTION
While I am testing my API I recently started to get the error below.
...ANSWER
Answered 2022-Mar-29 at 13:29As of version 2.1.0, werkzeug has removed the as_tuple argument to Client. Since Flask wraps werkzeug and you're using a version that still passes this argument, it will fail. See the exact change on the GitHub PR here.
You can take one of two paths to solve this:
Upgrade flask
Pin your werkzeug version
QUESTION
I am trying to connect to Postgress and create a folder test.db via Flask. When I run "python3" in the terminal and from there when I run "from app import db" I get an import error:
...ANSWER
Answered 2021-Oct-11 at 10:45Use older version of python (eg 3.8)
QUESTION
My app.py file
...ANSWER
Answered 2022-Feb-19 at 23:10I found a way to accomplish it. This is what needed
QUESTION
I am implementing a simple chatbot using keras and WebSockets. I now have a model that can make a prediction about the user input and send the according answer.
When I do it through command line it works fine, however when I try to send the answer through my WebSocket, the WebSocket doesn't even start anymore.
Here is my working WebSocket code:
...ANSWER
Answered 2022-Feb-16 at 19:53There is no problem with your websocket route. Could you please share how you are triggering this route? Websocket is a different protocol and I'm suspecting that you are using a HTTP client to test websocket. For example in Postman:
HTTP requests are different than websocket requests. So, you should use appropriate client to test websocket.
QUESTION
We are using command prompt c:\gcloud app deploy app.yaml, but get the following error:
ANSWER
Answered 2022-Jan-06 at 09:24Your setuptools version is likely to be yanked:
https://pypi.org/project/setuptools/60.3.0/
Not sure how to fix that without a working pip though.
QUESTION
ANSWER
Answered 2021-Dec-08 at 14:08macOS Monterey introduced AirPlay Receiver running on port 5000. This prevents your web server from serving on port 5000. Receiver already has the port.
You can either:
- turn off AirPlay Receiver, or;
- run the server on a different port (normally best).
Turn off AirPlay Receiver
Go to System Preferences → Sharing → Untick Airplay Receiver.
You should be able to rerun the server now on port 5000 and get a response:
QUESTION
Forgive me if this has been answered elsewhere. I've been searching SO and haven't been able to translate the seemingly relevant Q&As to my scenerio.
I'm working on a fun personal project where I have 4 main schemas (barring relationships for now):
- Persona (name, bio)
- Episode (title, plot)
- Clip (url, timestamp)
- Image (url)
Restrictions (Basis of Relationships):
- A Persona can show up in multiple episodes, as well as multiple clips and images from those episodes (but might not be in all clips/images related to an episode).
- An Episode can contain multiple personas, clips, and images.
- An Image/Clip can only be related to a single Episode, but can be related to multiple personas.
- If a Persona is already assigned to episode(s), then any clip/image assigned to the persona can only be from one of those episodes or (if new) must only be capable of having one of the episodes that the persona appeared in associated to the clip/image.
- If an Episode is already assigned persona(s), then any clip/image assigned to the episode must be related to aleast one of those personas or (if new) must only be capable of having one or more of the personas from the episode associated to the clip/image.
I've designed the database structure like so:
This generates the following sql:
...ANSWER
Answered 2021-Oct-05 at 23:19I can't think of any way to add this logic on the DB. Would it be acceptable to manage these constraints in your code? Like this:
Event: a new image would be insterted in DB
QUESTION
The issue has appeared recently and the previously healthy container now enters a sleep loop when a shutit session is being created. The issue occurs only on Cloud Run and not locally.
Minimum reproducible code:
requirements.txt
ANSWER
Answered 2021-Sep-23 at 12:35It's not a perfect replacement but you can use one of the following instead:
I'm not sure what's the big picture so I'll add various options
For remote automation tasks from a flask web server we're using paramiko for its simplicity and quick setup, though you might prefer something like pyinfra for large projects or subprocess for small local tasks.
- Paramiko - a bit more hands-on\manual than
shutit, run commands over the ssh protocol.
example:
QUESTION
I have a flask API and I'm using Flask-SQLAlchemy to handle a SQLite database. I have a table which stores log entries, and I want to limit the maximum number of rows to a number n. Since insertions are also made from another script outside of flask using raw SQL, I created a trigger that checks the number of rows and deletes the oldest ones if the number is higher than n:
...ANSWER
Answered 2021-Sep-19 at 17:01You don't need to create a DDL instance, you can execute the SQL within the listener function. The relevant docs are here.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install flask
You can use flask like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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