How can I see output from a Brython script on the page? Why doesn't `print` work?

Question

I try to use Brython. I have a Python script (test.py) and I would like to display the result of this script in the browser.

I have tried :

<html>
<head>
<script src="brython.js"></script>
</head>
<body onload="brython()">
<script type="text/python" src="test.py"></script>
</body>
</html>

and my script is :

x = int(input("Value: "))
x = pow(x,2)
print("Result: " + str(x))

Unfortunately, I cannot display the result in the browser. Is there something missing ?

Asked By: Peter Estiven

||

Source

Answer 1

In Brython, print displays in the browser console.

If you want to write the result in the HTML document:

from browser import document

x = int(input("Value: "))
x = pow(x, 2)

document <= "Result: " + str(x)

[edit] Another option is to set sys.stdout to an object with a write() method, for instance document in module browser :

from browser import document
import sys

sys.stdout = document
print("Hello", "world !")

Answered By: marqueemoon

Answer 2

Add an id=’fish’ whatever for tag and then overwrite it in python:

<body id='fish' onload='brython()'>

and then:

d = document['fish']
d.clear()
d <= "Result: %s" % str(x)

Note that you need to call element .clear() first, <= is the same as Javascript .appendChild(), see the documentation: https://brython.info/static_doc/en/cookbook/content_in_div.html

If you want to see it in proper XHTML page, don’t replace the whole body but just one div-element/tag for example. Or overwrite the whole body with all needed XHTML tags.

Answered By: Juha Tuomala

How can I see output from a Brython script on the page? Why doesn't `print` work?

Question:

Answers: