1.iter补充

# l=['a','b','c','d']

#

# def test():

#     return l.pop()

#

# x=iter(test,'b')

# print(x.__next__())

# print(x.__next__())

# print(x.__next__())

from functools import partial

def add(x,y):

    return x+y

func = partial(add,1)

print(func(1))

print(func(2))

# from functools import partial

# def add(x,y):

#     return x+y

# # print(add(1,2))

#

# func=partial(add,1) #偏函数

# print(func(1))

# print(func(2))

# recv_size = 0

# recv_msg = b''

# while recv_size < length:

#     recv_msg += tcp_client.recv(buffer_size)

#     recv_size = len(recv_msg)  #1024

# ''.join(iter(partial(tcp_client.recv,1024),b''))

2.ntp_client和ntp_server

# from socket import *

# import time

# ip_port=('127.0.0.1',8080)

# buffer_size=1024

#

# udp_server=socket(AF_INET,SOCK_DGRAM) #数据报

# udp_server.bind(ip_port)

from socket import *

import time

ip_port = ('127.0.0.1',8080)

buffer_size = 1024

udp_server = socket(AF_INET,SOCK_DGRAM)

udp_server.bind(ip_port)

while True:

    data,addr =udp_server.recvfrom(buffer_size)

    print(data)

    if not data:

        fmt = '%Y-%m-%d %X'

    else:

        fmt = data.decode('utf-8')

    back_time = time.strftime(fmt)

    udp_server.sendto(back_time.encode('utf-8'),addr)

# while True:

#     data,addr=udp_server.recvfrom(buffer_size)

#     print(data)

#

#     if not data:

#         fmt='%Y-%m-%d %X'

#     else:

#         fmt=data.decode('utf-8')

#     back_time=time.strftime(fmt)

#

#     udp_server.sendto(back_time.encode('utf-8'),addr)
# from socket import *

# ip_port=('127.0.0.1',8080)

# buffer_size=1024

#

# udp_client=socket(AF_INET,SOCK_DGRAM) #数据报

#

# while True:

#     msg=input('>>: ').strip()

#     udp_client.sendto(msg.encode('utf-8'),ip_port)

#

#     data,addr=udp_client.recvfrom(buffer_size)

#     print('ntp服务器的标准时间是',data.decode('utf-8'))

from socket import  *

ip_port = ('127.0.0.1',8080)

buffer_size = 1024

udp_client = socket(AF_INET,SOCK_DGRAM)

while True:

    msg = input('>>: ').strip()

    udp_client.sendto(msg.encode('utf-8'),ip_port)

    data,addr=udp_client.recvfrom(buffer_size)

    print('ntp服务器的标准时间是',data.decode('utf-8'))

3.time复习

# import time

import  time

# print(time.time())

# print(time.localtime(time.time()))

# print(time.gmtime(time.time()+28800))

# print(time.mktime(time.localtime()))

# print(time.strftime('%Y-%m-%d %X',time.localtime()))

# print(time.strftime('%F %X',time.localtime()))

print(time.ctime())

# print(time.time()) #用于计算

# print(time.localtime(time.time()))

# print(time.gmtime(time.time()+28800))

# print(time.mktime(time.localtime())) #格式化-->时间戳

# print(time.strftime('%Y-%m-%d %X',time.localtime())) #格式化--》字符串时间

# print(time.strftime('%F %X',time.localtime()))

# print(time.strptime('2017-01-03 09:37:06','%Y-%m-%d %X')) #字符串--》格式化

# print(time.ctime())

4.udp的客户端与服务端通信

from socket import *

ip_port=('127.0.0.1',8081)

buffer_size=1024

udp_client=socket(AF_INET,SOCK_DGRAM) #数据报

while True:

    msg=input('>>: ').strip()

    udp_client.sendto(msg.encode('utf-8'),ip_port)

    data,addr=udp_client.recvfrom(buffer_size)

    # print(data.decode('utf-8'))

    print(data)
# from socket import *

# ip_port=('127.0.0.1',8080)

# buffer_size=1024

#

# udp_server=socket(AF_INET,SOCK_DGRAM) #数据报

# udp_server.bind(ip_port)

#

from  socket import  *

ip_port = ('127.0.0.1',8081)

buffer_size = 1024

udp_server = socket(AF_INET,SOCK_DGRAM)

udp_server.bind(ip_port)

while True:

    data,addr = udp_server.recvfrom(buffer_size)

    print(data)

    udp_server.sendto(data.upper(),addr)

# while True:

#     data,addr=udp_server.recvfrom(buffer_size)

#     print(data)

#

#     udp_server.sendto(data.upper(),addr)

5.解决粘包

# from socket import *

# ip_port=('127.0.0.1',8080)

# back_log=5

# buffer_size=1024

#

# tcp_server=socket(AF_INET,SOCK_STREAM)

# tcp_server.bind(ip_port)

# tcp_server.listen(back_log)

#

from socket import  *

ip_port = ('127.0.0.1',8082)

back_log = 5

buffer_size = 1024

tcp_server = socket(AF_INET,SOCK_STREAM)

tcp_server.bind(ip_port)

tcp_server.listen(back_log)

conn,addr = tcp_server.accept()

data1 = conn.recv(5)

print('第一次数据',data1)

data2 = conn.recv(5)

print('第二次数据',data2)

data3 = conn.recv(5)

print('第三次数据',data3)

# conn,addr=tcp_server.accept()

#

# data1=conn.recv(5)

# print('第一次数据',data1)

#

# data2=conn.recv(5)

# print('第2次数据',data2)

#

# data3=conn.recv(5)

# print('第3次数据',data3)
# from socket import *

# import time

# ip_port=('127.0.0.1',8080)

# back_log=5

# buffer_size=1024

#

# tcp_client=socket(AF_INET,SOCK_STREAM)

# tcp_client.connect(ip_port)

#

from  socket import *

import time

ip_port = ('127.0.0.1',8082)

back_log = 5

buffer_size = 1024

tcp_client = socket(AF_INET,SOCK_STREAM)

tcp_client.connect(ip_port)

tcp_client.send('hello'.encode('utf-8'))

tcp_client.send('world'.encode('utf=8'))

tcp_client.send('egon'.encode('utf-8'))

# tcp_client.send('hello'.encode('utf-8'))

# tcp_client.send('world'.encode('utf-8'))

# tcp_client.send('egon'.encode('utf-8'))

#

#

# # time.sleep(1000)

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