self.udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, 0)

在这个代码中，self.udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, 0)是用来创建一个UDP套接字对象的语句。其中，socket.AF_INET表示使用IPv4协议进行通信，socket.SOCK_DGRAM表示使用UDP协议进行通信，而最后的0表示将套接字设置为阻塞模式（默认值）。所以这个语句的作用是创建一个UDP套接字对象，并将其赋值给self.udp_socket变量。
#### 引用[.reference_title]
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