In order to take full advantage of this tutorial some knowledge of Python is required including an understanding of object oriented programming in Python. In addition, a basic understanding of HTML is required (HTML - Getting Started).
The examples in this tutorial use Python f-strings which were added in Python 3.6
First, make sure that the version of
python3 you have is 3.6 or higher:
$ python3 --version
If not, upgrade your Python interpreter.
It is probably best to run the programs in this tutorial in a virtual environment so that your system wide Python interpreter is not affected, though this is not a requirement. The following commands create a directory for this tutorial, then create a virtual environment named jp and activate it and finally install JustPy and its dependencies:
$ mkdir jptutorial $ cd jptutorial $ python3 -m venv jp $ source jp/bin/activate (jp) $ pip install justpy
On Microsoft Windows, the activation command for the virtual environment is
jp\Scripts\activate instead of the source command above.
Now, using your favorite code editor, create a file in the jptutorial directory called test.py that includes the following code:
import justpy as jp def hello_world(): wp = jp.WebPage() jp.Hello(a=wp) return wp jp.justpy(hello_world)
You can easily copy the code by hovering over it and then clicking 'Copy to clipboard' in the upper right corner
Running the Program¶
To run the program execute the following command:
$ python3 test.py
Then, direct your browser to http://127.0.0.1:8000 or http://localhost:8000/
This refers to port 8000 on the local machine and should work in most environments.
You should see 'Hello!' in your browser. Click it a few times also. It should report the number of times it has been clicked.
In this tutorial, when asked to "run the program", follow the two steps above (there is no need to name the file "test.py", you can use any name you like).