human
Complete the below
def do_uninstall(specs, force):

    ''''Uninstalls all the specs in a list.
    Args:
    specs: list of specs to be uninstalled
    force: force uninstallation (boolean)'
    '''

=====
Give me a the Python program you requested?
assistant
#Here is the Python program you requested.
    packages = []
    for item in specs:
        try:
            packages.append(item.package)
        except spack.repository.UnknownEntityError:
            spack.Package.uninstall_by_spec(item, force=True)
    def num_installed_deps(pkg):
        dependents = spack.store.db.installed_relatives(pkg.spec, 'parents', True)
        return len(dependents)
    packages.sort(key=num_installed_deps)
    for item in packages:
        item.do_uninstall(force=force)