do we need to learn python for web development code example

Example: is python good for web development

Yes, with python, you can web development :)
  
I recommend the django framework: https://www.djangoproject.com/
and Flask: https://flask.palletsprojects.com/

If you want to read more, I can recommend you this article:
https://www.imaginarycloud.com/blog/why-use-python-for-web-development/