How would I group values based on range of number in python, and then update an attribute table with that information??

Question

How would I group values based on range of number in python, and then update an attribute table with that information?

An example of what I'm trying to accomplish is described below, however they don't describe how to use the data update cursor to update the attribute column.

data - Group values based on range of number in python - Stack Overflow‌

DanPatterson_Retired · Accepted Answer

You don't want to be following that forum until you are fully grounded in programming in python and arcmap...a more appropriate forum to check for similar posts would be

Geographic Information Systems Stack Exchange‌

until you can get an answer here