python - 将 Node.js 脚本移植到 Python

Question

我想将此 Node.js 脚本移植到 Python 中以控制天空盒，https://github.com/dalhundal/sky-remote/blob/master/sky-remote.js

我已经完成了我能做的最好的事情，代码如下；

import time, math, socket, struct, time
from array import array

    #sky q port 5900

    class remote:
        commands={"power": 0, "select": 1, "backup": 2, "dismiss": 2, "channelup": 6, "channeldown": 7, "interactive": 8, "sidebar": 8, "help": 9, "services": 10, "search": 10, "tvguide": 11, "home": 11, "i": 14, "text": 15,  "up": 16, "down": 17, "left": 18, "right": 19, "red": 32, "green": 33, "yellow": 34, "blue": 35, 0: 48, 1: 49, 2: 50, 3: 51, 4: 52, 5: 53, 6: 54, 7: 55, 8: 56, 9: 57, "play": 64, "pause": 65, "stop": 66, "record": 67, "fastforward": 69, "rewind": 71, "boxoffice": 240, "sky": 241}
        connectTimeout = 1000;

        def __init__(self, ip, port=49160):
            self.ip=ip
            self.port=port

        def showCommands(self):
            for command, value in self.commands.iteritems():
                print str(command)+ " : "+str(value) 

        def getCommand(self, code):
            try:
                return self.commands[code]
            except:
                print "Error: command '"+code+"' is not valid"
                return False

        def press (self, sequence):
            if isinstance(sequence, list):
                for item in sequence:
                    toSend=self.getCommand(item)
                    if toSend:
                        self.sendCommand(toSend)
                        time.sleep(0.5)

            else:
                toSend=self.getCommand(sequence)
                if toSend:
                    self.sendCommand(toSend)    

        def sendCommand(self, code):
            commandBytes = array('l', [4,1,0,0,0,0, int(math.floor(224 + (code/16))), code % 16])

            try:
                client=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            except socket.error, msg:
                print 'Failed to create socket. Error code: ' + str(msg[0]) + ' , Error message : ' + msg[1]
                return

            try:
                client.connect((self.ip, self.port))
            except:
                print "Failed to connect to client"
                return

            l=12
            timeout=time.time()+self.connectTimeout

            while 1:
                data=client.recv(1024)
                data=data

                if len(data)<24:
                    client.sendall(data[0:l])
                    l=1
                else:
                    client.sendall(buffer(commandBytes))
                    commandBytes[1]=0
                    client.sendall(buffer(commandBytes))
                    client.close()
                    break

                if time.time() > timeout:
                    print "timeout error"
                    break

我认为问题是如何形成缓冲区？我不完全确定，因为这是我第一次处理缓冲区。阅读了关于 new Buffer 的 Node.js 文档，看起来它创建了一个八位字节数组，而我拥有的是一个整数数组，我可能是错的，但八位字节是 8 位，而整数是 4 位，我已经尝试将数组更改为 long 和 double，但这似乎无法解决问题

Answer 1

我有时间快速阅读了 Node.js 如何处理缓冲区和一般缓冲区，看起来我认为是正确的。

改变；

commandBytes = array('l', [4,1,0,0,0,0, int(math.floor(224 + (code/16))), code % 16])

至；

commandBytes = bytearray([4,1,0,0,0,0, int(math.floor(224 + (code/16))), code % 16])

此外，只需传递字节数组即可；

client.sendall(commandBytes)

而不是；

client.sendall(buffer(commandBytes))