code: def read(self, n=-1):
          
          buf = ''
          if n is None:
              n = -1
          while True:
              if n < 0:
                  data = self.read1(n)
              elif n > len(buf):
                  data = self.read1(n - len(buf))
              else:
                  return buf
              if len(data) == 0:
                  return buf
              buf += data
docs: Read and return up to n bytes.
          If the argument is omitted, None, or negative, data is read and returned until EOF is reached..