This graph shows how to construct a mathematical expression. It uses

• Data types (int, float, string, list, dict, …)
• Math operator (+, -,*, /, %, **, … )
• Comparison operator (>, >=, ==, …)
• Boolean operator (and, or, not, …)

• If an input port has multiple connection, it automatically create a list. The order depends of the x position of the input box.

• getitem allows to retrieve a particular element in a list

• range generates a list of int between start and stop, ans using a particular step

• Read a file
• Write a file
• List directory files