Create CheckDependencies class

[danner26]

This class extends Check adding a dependency tree so when an item is checked it automatically checks all it's dependencies. Also, if an item is unchecked it automatically unchecks all it's dependants. The effect cascades to dependencies of dependencies.

Here's an example:

from bullet import CheckDependencies
from pprint import pprint
dependency_tree = (
    ("Option A", ("Option B",)),
    ("Option B", ("Option C",)),
    ("Option C", ()),
    ("Option D", ("Option C", "Option E")),
    ("Option E", ()),
)
pprint(dependency_tree)
print()
cli = CheckDependencies("Check some options", dep_tree=dependency_tree)
print(cli.launch())

Or a different usage:

from bullet import CheckDependencies
from pprint import pprint
dependency_tree = (
    ("Option A", ()),
    ("Option B", ()),
    ("Option C", ()),
    ("Option D", ()),
    ("Option E", ()),
    ("ALL ABOVE", ("Option A", "Option B", "Option C", "Option D", "Option E")),
)
pprint(dependency_tree)
print()
cli = CheckDependencies("Check some options", dep_tree=dependency_tree)
print(cli.launch())

bchao1#75