6.5 Using invoke to get command-line input

The invoke package is not part of the standard library. It needs to be installed separately. Generally, this is done with the following terminal command:

(cookbook3) % python -m pip install invoke

Using the python -m pip command ensures that we will use the pip command that goes with the currently active virtual environment, shown as cookbook3.

See the Using argparse to get command-line input recipe in this chapter. It describes a command-line application that works something like the following:

 
 
% RECIPE=7  # invoke

The command will always be invoke. The Python path information is used to locate a module file named tasks.py to provide the definitions of the commands that can be invoked. The remaining command-line values are provided to a function defined in the tasks module.

6.5.1 Getting ready

Often, we’ll create a two-tiered design when...