If you write another program with a triangle in it, you can just copy and paste your triangle code wholesale! That is how to define a function in Python and call it! The function here is called ...

Note how the bottom part of the above program can be reworked ... by way of the ncalls column. In Python, the mere act of making a function call incurs a relatively large amount of overhead.

Learn how Python's dictionary data structure works ... literal—a dictionary structure that is hard-coded into the program’s source. It’s also possible to create or modify dictionaries ...