Bittorrent 精彩代码分析

RawServer.py: 

   def write(self, s):
        assert self.socket is not None
        self.buffer.append(s)
        if len(self.buffer) == 1:  #为什么是1呢？因为buffer是一个列表(list), 比如 buffer=['this is a sample'].
            self.try_write()