8.1.3 混合内容流
在压缩和未压缩数据混合在一起的情况下，还可以使用decompressobj()返回的Decompress类。
import zlib
lorem = open('lorem.txt','rb').read()
compressed = zlib.compress(lorem)
combined = compressed + lorem
decompressor = zlib.decompressobj()
decompressed = decompressor.decompress(combined)
decompressed_matches = decompressed == lorem
print('Decompressed matches lorem:',decompressed_matches)
unused_matches = decompressor.unused_data == lorem
print('Unused data matches lorem:',unused_matches)
解压缩所有数据后，unused_data属性会包含未用的所有数据。
运行结果：
Decompressed matches lorem: True
Unused data matches lorem: True