there is a class from Udemy about learning Python. right now it is on sale for $15.

https://www.udemy.com/complete-python-bootcamp/ [www.udemy.com]

would this help to learn Python to be used in Houdini?

You don't really need python to get up and running in Houdini. Try watching some of the startup videos under the Learn Menu up above.

Or head to Go Procedural on Vimeo.
https://vimeo.com/142466795 [vimeo.com]

For me, I have use python about 3%-4% of the time when constructing scene work. VEX is actually more useful.

Hmmm, with Python you can do some cool things :-)
https://cmivfx.com/houdini-xml-based-procedural-cities [cmivfx.com]

https://youtu.be/VxcC7qqCZUo?t=1h6m10s [youtu.be]

https://cmivfx.com/houdini-python-character-picker [cmivfx.com]

Interesting!
Matthias have you tried the python cities tutorial by any chance?

Yes :-)
should work with a little bit modifying the Python from the example file.