socketpythonbind

‘壹’ python socket报错[WinError 10061] 由于目标计算机积极拒绝，无法连接。 是什么意思

127.0.0.1 8900是你本机电脑的端口，别的电脑连不上，有可能没有启用监听890端口的服务，也有可能电脑安装了安全防护软件，禁止其它机器访问不明端口。你查一下对方机器情况。

‘贰’ python socket send 错误:TypeError: 'str' does not support the buffer interface

python3.2 socket.send 修改传送数据必须是bytes
http://docs.python.org/py3k/library/socket.html
改成 s.send(b'Hello')

这里有官网的例子：
# Echo server program
import socket
HOST = '' # Symbolic name meaning all available interfaces
PORT = 50007 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()
print('Connected by', addr)
while True:
data = conn.recv(1024)
if not data: break
conn.send(data)
conn.close()

# Echo client program
import socket
HOST = 'daring.cwi.nl' # The remote host
PORT = 50007 # The same port as used by the server
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
s.send(b'Hello, world')
data = s.recv(1024)
s.close()
print('Received', repr(data))