今天在网上找了很久，终于找到1个snappy压缩命令行，记录下来：
1.wget https://bootstrap.pypa.io/get-pip.py
2.python ./get-pip.py
3.yum install gcc-c++
4.pip install python-snappy
用法：
python -m snappy -c uncompressed_file compressed_file.snappy
python -m snappy -d compressed_file.snappy uncompressed_file
参考：
https://github.com/andrix/python-snappy