Web Programming with Flask - Intro to Computer Science - Harvard's CS50 (2018) - YouTube

Wed May 13 2020 18:55:25 GMT+0000 (Coordinated Universal Time)

Saved by @mishka #flask

https://www.youtube.com/watch?v=zdgYw-3tzfI

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Web Programming with Flask - Intro to Computer Science - Harvard's CS50 (2018) - YouTube

https://www.youtube.com/watch?v=zdgYw-3tzfI

Basic Flask App

from flask import Flask,render_template,request, redirect
 
 
app = Flask(__name__)
app.config['SECRET_KEY'] = 'dajdsjas'
 
 
@app.route('/home')
def home():
    return 'Home page'
 
 
 
@app.route('/take_parameter', methods = ["POST"])
def takeparam():
    try:
        pas = request.args(silent=True)
        #app.logger.info(json)
        return 'OK'
    except:
        return 'INTERNAL ERROR', 500
    
 
@app.route('/take_json', methods = ["POST"])
def takejson():
    try:
        pas = request.get_json(silent=True)
        #app.logger.info(json)
        return 'OK'
    except:
        return 'INTERNAL ERROR', 500
    
if __name__ =='__main__':
    app.run(debug=True)

python - Flask ImportError: No Module Named Flask - Stack Overflow

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

python - Flask ImportError: No Module Named Flask - Stack Overflow


export FLASK_ENV=development                         

export FLASK_ENV=production 

FLASK_APP=hello.py flask run






If you have installed many dependencies in your system and you need requirements.txt for a specific project, you can install first pipreqs:

$ pip install pipreqs

and execute the below command under the project folder.

$ pipreqs

This command will generate requirements.txt file for the particular project.

Python and Flask Tutorial in Visual Studio Code

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>{% block title %}{% endblock %}</title>
        <link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='site.css')}}" />
    </head>

    <body>
        <div class="navbar">
            <a href="{{ url_for('home') }}" class="navbar-brand">Home</a>
            <a href="{{ url_for('about') }}" class="navbar-item">About</a>
            <a href="{{ url_for('contact') }}" class="navbar-item">Contact</a>
        </div>

        <div class="body-content">
            {% block content %}
            {% endblock %}
            <hr/>
            <footer>
                <p>© 2018</p>
            </footer>
        </div>
    </body>
</html>

Flask Tutorial - HTML Templates with Jinja - techwithtim.net

<!doctype html>
<html>
<head>
    <title>Home page</title>
    </head>
    <body>
	{% if content == "true" %}
            <p>True!</p>
        {% else %}
            <p>False :(</p>
        {% endif %}
    </body>
</html>

Use a Flask Blueprint to Architect Your Applications – Real Python

ecommerce/
|
├── static/
|   ├── logo.png
|   ├── main.css
|   ├── generic.js
|   └── product_view.js
|
├── templates/
|   ├── login.html
|   ├── forgot_password.html
|   ├── signup.html
|   ├── checkout.html
|   ├── cart_view.html
|   ├── index.html
|   ├── products_list.html
|   └── product_view.html
|
├── app.py
├── config.py
└── models.py

Build a Flask Application with Blueprints - DEV Community

myapp
|
|--app
|    |--main
|    |    |--__init__.py
|    |    |--main.py
|    |
|    |--auth
|    |    |--__init__.py
|    |    |--auth.py
|    |
|    |--__init__.py
|    |--errors.py
|    |--models.py
|    |-- templates/
|    |--static/
|
|--tests/
|--config.py
|--myapp.py
|--requirements.txt

example de comment gérer des tâches

@app.route('/long-task')
def long_task():
	do_long_task()
	return "Task completed"

exemple avec threading

import threading

@app.route('/long-task')
def long_task():
	threading.Thread(target=do_long_task).start()
	return "Task started"

undefined

#python #flask #inputfile

Handling File Uploads With Flask - miguelgrinberg.com

<!doctype html>
<html>
  <head>
    <title>File Upload</title>
  </head>
  <body>
    <h1>File Upload</h1>
    <form method="POST" action="" enctype="multipart/form-data">
      <p><input type="file" name="file"></p>
      <p><input type="submit" value="Submit"></p>
    </form>
  </body>
</html>

#python #flask #uploadfile

Handling File Uploads With Flask - miguelgrinberg.com

from flask import Flask, render_template, request, redirect, url_for

app = Flask(__name__)

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

@app.route('/', methods=['POST'])
def upload_file():
    uploaded_file = request.files['file']
    if uploaded_file.filename != '':
        uploaded_file.save(uploaded_file.filename)
    return redirect(url_for('index'))

#flask #uploadfile

Handling File Uploads With Flask - miguelgrinberg.com

app.config['MAX_CONTENT_LENGTH'] = 1024 * 1024

#flask #uploadfile

Handling File Uploads With Flask - miguelgrinberg.com

app.config['UPLOAD_EXTENSIONS'] = ['.jpg', '.png', '.gif']

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