Python: Difference between revisions
| Line 21: | Line 21: | ||
if __name__ == '__main__': | if __name__ == '__main__': | ||
app.run() | app.run() | ||
in Powershell | in Powershell ??? | ||
$env:FLASK_ENV = "development" | $env:FLASK_ENV = "development" | ||
By default html files are located in a subfolder called 'templates'. They can be rendered by calling <code>render_template()</code>. | |||
====Flask Migration==== | ====Flask Migration==== | ||
Revision as of 12:04, 1 October 2021
Resources
Language
Python, named after the British comedy group Monty Python, is a high-level, interpreted, interactive, and object-oriented programming language.
Comment
# ... till end of line
__name__
The __name__ variable (two underscores before and after) is a special Python variable. It gets its value depending on how we execute the containing script. When you run the script, the __name__ variable equals '__main__'. When you import the script, it will contain the name of the imported script w/o extension (see C:\Uwes\python\UdacityFullWebDeveloper\testName\).
Frameworks
Flask
Flask is a micro web framework written in Python. Flask is using a template engine called Jinja.
To enable to run a flask application as a 'normal' python app with
python <FILE>
add to end of file
if __name__ == '__main__': app.run()
in Powershell ???
$env:FLASK_ENV = "development"
By default html files are located in a subfolder called 'templates'. They can be rendered by calling render_template().
Flask Migration
flask db init // creates migrations folder structure flask db migrate // check the current and the former model in DB and creates versions in migrations folder flask db upgrade flask db downgrade
Operation
Comannd Line
python -V // prints version python >>> <COMMAND>
Installation
- see EDT Win10 Laptop