>>> a =socket.socket()
>>> help(a.recv)
Help on built-in function recv:

recv(...) method of socket.socket instance
    recv(buffersize[, flags]) -> data

    Receive up to buffersize bytes from the socket.  For the optional flags
    argument, see the Unix manual.  When no data is available, block until
    at least one byte is available or until the remote end is closed.  When
    the remote end is closed and all data is read, return the empty string.

>>>