How do you insert an item into a dictionary (in python 3.7.2)?

[CrazyVideoGamez]

How do you insert an item into a dictionary? For example, I make a dictionary 
called "dictionary".

dictionary = {1: 'value1', 2: 'value3'}

What if I wanted to add a value2 in the middle of value1 and value3?
-- 
https://mail.python.org/mailman/listinfo/python-list