FLASK VE VS CODE
================
1) nový projekt
2) venv
In VS Code, open the Command Palette (View > Command Palette or (Ctrl+Shift+P)). Then select the Python: Create Environment command to create a virtual environment in your workspace. Select venv and then the Python environment you want to use to create it.
3) terminál s aktivovaným venv
After your virtual environment creation has been completed, run Terminal: Create New Terminal (Ctrl+Shift+`)) from the Command Palette, which creates a terminal and automatically activates the virtual environment by running its activation script.
nebo "activate" nebo
4) nainstalovat Flask
python -m pip install flask
MINIMÁLNÍ APLIKACE
==================
1) create a new file in your project folder named app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def home():
return "Hello, Flask!"
2) spustit v terminálu
python -m flask run
The development server looks for app.py by default. When you run Flask, you should see output similar to the following:
(.venv) D:\py\\hello_flask>python -m flask run
* Environment: production
WARNING: Do not use the development server in a production environment.
Use a production WSGI server instead.
* Debug mode: off
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
3) otevřít v prohlížeci
Ctrl+click na adresu v terminálu (http://127.0.0.1:5000/)
4) zastavení aplikace v terminálu Ctrl+c
---
5) různé cesty
6) proměnné
(DEBUGGER - nepovinné)
======================
1) aplikace musí být zastavená
v terminálu Ctrl+c
2) Switch to the Run and Debug view in VS Code (using the left-side activity bar or Ctrl+Shift+D).
click "To customize Run and Debug create a launch.json file".
3) Select Flask from the dropdown
4) (upravit soubor, např. cesta k app.py)
5) přidat breakpoint, F5 (zobrazit stránku s breakpointem)
TEMPLATES
==========
- The default templating engine for Flask is Jinja, which is installed automatically when you install Flask.
1) Inside the prvni folder, create a folder named templates, which is where Flask looks for templates by default.
2) do main.html
Hello, Flask
{%if name %}
Hello there, {{ name }}! It's {{ date.strftime("%A, %d %B, %Y at %X") }}.
{% else %}
What's your name? Provide it after /hello/ in the URL.
{% endif %}
3) do app.py
from flask import render_template
...
@app.route("/hello/")
@app.route("/hello/")
def hello_there(name = None):
return render_template(
"hello.html",
name=name,
date=datetime.now()
)
CSS
=====
1) vytvořit adresář static
2) uvnitř soubor style.css
strong {
color: red;
}
3) do templatu přidat link na styl