Python implements asynchronous callback mechanism code sharing

1 Copy the following code to a file named asyncore.py

The code is as follows:

Import socket
Import Select
Import Sys

def ds_asyncore (addr,callback,timeout=5):
S=socket.socket (Socket.af_inet,socket. SOCK_STREAM)
S.connect (addr)
R,w,e = Select.select ([s],[],[],timeout)
If R:
RESPOSE_DATA=S.RECV (1024)
Callback (Respose_data)
S.close ()
return 0
Else
S.close ()
Return 1

2 Writing Your own code

1> Import Asyncore

2> defines a callback function Callback,callback requires a parameter to return data on behalf of the request

3> Directly calls Asyncore.ds_asyncore ((' 127.0.0.1 ', 33333), callback,timeout=5), where the first parameter is a (ip,port) tuple, the second is a callback function, and the third is the time-out.

The code is as follows:

Import Asyncore

If __name__== "__main__":
DEF callback (Respose_data):
Print Respose_data
Asyncore.ds_asyncore ((' 127.0.0.1 ', 33333), callback,timeout=5)

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