build_py.py 文件源码

def exclude_data_files(self, package, src_dir, files):
        """Filter filenames for package's data files in 'src_dir'"""
        globs = (self.exclude_package_data.get('', [])
                 + self.exclude_package_data.get(package, []))
        bad = []
        for pattern in globs:
            bad.extend(
                fnmatch.filter(
                    files, os.path.join(src_dir, convert_path(pattern))
                )
            )
        bad = dict.fromkeys(bad)
        seen = {}
        return [
            f for f in files if f not in bad
            and f not in seen and seen.setdefault(f, 1)  # ditch dupes
        ]