Each function defined in the server or client module of an item becomes an attribute of the item.
Thus, using the task tree, you can access any function declared in the client or server module in any project module.
For example, if we have a function some_func declared in the Customers client
module, we can execute it in any module of the project.
Note that the task is a global variable on the client.
task.customers.some_func()
On the server, the task is not global, but an item that triggered / called it is
passed to each event handler and function called by the
server
method. Therefore, if the some_func function is declared in the Customers
server module, it can be executed in a function or event handler as follows:
def on_apply(item, delta, params):
item.task.customers.some_func()
Note that event handlers are just functions and can also be called from other modules.