def find_data_files(self, package, src_dir):
        """Return filenames for package's data files in 'src_dir'"""
        globs = (self.package_data.get('', [])
                 - self.package_data.get(package, []))
        files = self.manifest_files.get(package, [])[:]
        for pattern in globs:
            # Each pattern has to be converted to a platform-specific path
            files.extend(glob(os.path.join(src_dir, convert_path(pattern))))
        return self.exclude_data_files(package, src_dir, files)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/setuptools-0.6c11/setuptools/command/build_py.py/build_py.find_data_files/operator `+` -> `-`