Building Machine Learning Systems with Python - Third Edition

An introduction to tasks in jug

Tasks are the basic building blocks of jug. A task is composed of a function and values for its arguments. Consider this simple example:

def double(x): 
    return 2*x 

In this chapter, the code examples will generally have to be typed in script files. Commands that should be typed at the shell will be indicated by prefixing them with $.

A task could be call double with argument 3. Another task would be call double with argument 642.34. Using jug, we can build these tasks as follows:

from jug import Task 
t1 = Task(double, 3) 
t2 = Task(double, 642.34) 

Save this to a file called jugfile.py (which is just a regular Python file). Now, we can run jug execute to run the tasks. This is something you type on the command ...