python之路第八编_Socket_2

 

python动态导入及断言

 

新建一个python包,在里面新建一个类。2、在包的统计目录下新建一个python文件,导入python包里面的内容。并断言此结果是否为字符串。具体如下所示:

1 class dog(object):
2     def __init__(self):
3         self.name ="haha"
1 import importlib
2 aa = importlib.import_module("lib.aa")
3 print(aa.dog().name)
4 
5 assert type(aa.dog().name) is str  #断言他是字符串,才能执行后面的内容
6 
7 print("aa")
在复习python3编码的问题

 

在python3中默认的编码为字节码,即bytes。在数据传输中必须为二进制格式,所以必须强制转换成uncode格式。

UTF-8编码:是对Unicode 编码的压缩和优化,他不再使用最少2个字节,而是将所有的字符和符号进行分类:ascii码中的内容用1个字节保存、欧洲的字符用2个字节保存,东亚的字符用3个字节保存。

如下为转换方式

Socket配置

 

 1 import socket
 2 
 3 client = socket.socket() #声明socket类型,同时生成socket连接对象
 4 #client.connect(('192.168.16.200',8888))
 5 client.connect(('localhost',8888))
 6 while True:
 7     msg = input(">>:").strip()
 8     if len(msg) == 0:continue
 9     client.send(msg.encode("utf-8"))
10     data = client.recv(10240)
11 
12     print("recv:",data.decode())
13 
14 client.close()
Socket_server
 1 import socket
 2 import os,hashlib
 3 client =socket.socket()
 4 client.connect(("localhost",9990))
 5 while True:
 6     cmd = input(">>:").strip()
 7     if len(cmd) ==0:continue
 8     if cmd.startswith("get"):
 9         client.send(cmd.encode())
10         server_response = client.recv(1024)
11         print("server response:",server_response)
12         client.send(b"ready to recv file")
13         file_total_size = int(server_response.decode())
14         recived_size = 0
15         filename = cmd.split()[1]
16         f =open(filename+".new","wb")
17         m = hashlib.md5()
18         while recived_size <file_total_size:
19             if file_total_size -recived_size >1024:
20                 size =1024
21             else:
22                 size = file_total_size -recived_size
23                 print("last receive:",size)
24             data = client.recv(size)
25             recived_size +=len(data)
26             m.update(data)
27             f.write(data)
28         else:
29             new_file_md5 = m.hexdigest()
30             print("file recv done",recived_size,file_total_size)
31             f.close()
32         server_file_md5 = client.recv(1024)
33         print("sever file md5:",server_file_md5)
34         print("client file md5:",new_file_md5)
35 
36 client.close()
Socket_client

 

posted @ 2016-09-12 10:40  星空下的夜  阅读(195)  评论(0编辑  收藏  举报