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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _install_p4v_osx(self, url, overwrite=False):
 """ Install perforce applications and binaries for mac """

        package_exists = False
        root_dir = os.path.expanduser(os.path.join("~", "Applications"))
        package_exists = len([x for x in P4V_APPLICATIONS if os.path.exists(os.path.join(root_dir, x))])
        if not package_exists or overwrite:
            lib.extract_dmg(url, root_dir)
        else:
            self.logger.warn("P4V exists already in %s! Not overwriting..." % root_dir)
        return True