Install Slackware binary packages

def bin_install(self):
        """Install Slackware binary packages
        """
        packages = self.args[1:]
        options = [
            "-i",
            "--installpkg"
        ]
        flag = ""
        flags = [
            "--warn",
            "--md5sum",
            "--root",
            "--infobox",
            "--menu",
            "--terse",
            "--ask",
            "--priority",
            "--tagfile"
        ]
        if len(self.args) > 1 and self.args[0] in options:
            if self.args[1] in flags:
                flag = self.args[1]
                packages = self.args[2:]
            PackageManager(packages).install(flag)
        else:
            usage("")