Python socket Programming Four: analog tick chart

Set up a socket, run the server first, then run the client, set up the connection after the server from the local database to send a truncated data to the client, the client accepts the data drawing simulation ticks

• 1.socket

#-*-coding:utf-8-*-"""Socket Module"""ImportSocketImportstructImportSQLAlchemyImportPandas########################################################################classSckt:#----------------------------------------------------------------------    def __init__(Self, host ='192.168.1.3', Port = 12345): Self.host=host Self.port=Port#----------------------------------------------------------------------    defRun_server (self): Sckt=Socket.socket (socket.af_inet, socket. Sock_stream) Sckt.bind ((Self.host, Self.port)) Sckt.listen (5)        """Connection Library"""engine= Sqlalchemy.create_engine ('Mssql+pyodbc://sa:[email protected]')        """Take open Price"""Open= (Pandas.read_sql ('SH', engine)) ['Open'] I=0 whiletrue:connection, Address=sckt.accept ()ifCONNECTION.RECV (1024x768) = = B'Link'  andI < (len (Open)-1):                               """Data Packaging"""connection.send (Struct.pack ('F', Open[i])) I+ = 1Else: connection.send (b'Cut off the connection!') Connection.close ()#----------------------------------------------------------------------    defRun_client (self, message = b'Link'): Sckt=Socket.socket (socket.af_inet, socket. Sock_stream) Sckt.connect ((Self.host, Self.port)) sckt.send (message)"""data Unpacking, note that unpack requires four bytes, which is used after the following [: 4]"""Open= Struct.unpack ('F', SCKT.RECV (1024) [: 4]) sckt.close ()"""return open price, go to format usage followed by [0]"""        returnOPEN[0]

• 2.server

# -*-coding:utf-8-*- """ server-side single file """ Import syssys.path.append ('C:\WinPython-32bit-3.5.1.3\myWorkSpace1')  Import= f1.sckt () f1.run_server ()

• 3.client

#-*-coding:utf-8-*-"""client alone one file"""Importf1f1=f1.sckt ()ImportMatplotlib.pylab as Pltopn= [] forIinchRange (0, 1000): Opn.append (F1.run_client ()) Plt.plot (OPN) Plt.grid (True, Axis='both')        """There must be pause, or it will get stuck."""Plt.pause (0.1)"""run the server first, run the client"""

• 4.runtimeplot

Python socket Programming Four: analog tick chart