### 使用Python检测WiFi连接状态并实现自动连接 对于在计算机上运行的Python脚本来说，可以通过多种方式来检查Wi-Fi连接的状态以及尝试重新连接。下面介绍一种基于Windows平台的方式，在Linux或其他操作系统下可能需要调整命令或库。 #### Windows环境下使用`subprocess`模块执行CMD命令 为了简化操作，这里利用系统的内置工具——命令提示符(CMD)，并通过Python中的[subprocess](https://docs.python.org/3/library/subprocess.html)模块调用它来进行Wi-Fi状态查询和连接处理[^1]。 ```python import subprocess def check_wifi_status(): """Check current Wi-Fi connection status.""" result = subprocess.run(['netsh', 'wlan', 'show', 'interfaces'], capture_output=True, text=True) if "Media disconnected" in result.stdout: return False elif "State : connected" in result.stdout: return True raise Exception("Failed to determine the WiFi state.") def connect_to_wifi(ssid, password=None): """ Connects to a specified Wi-Fi network. Parameters: ssid (str): The SSID of the target wireless network. password (Optional[str]): Password for connecting to protected networks. Returns: bool: Whether successfully connected or not. """ try: profile_name = f'"{ssid}"' # If there's no saved profile but we have credentials provided... if password is not None and "There are no profiles on the system!" in \ subprocess.check_output(f"netsh wlan show profiles", shell=True).decode('utf-8'): add_profile_command = [ 'netsh', 'wlan', 'add', 'profile', f'name={profile_name}', f'keyMaterial={password}' ] process_adding = subprocess.Popen(add_profile_command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) output, _ = process_adding.communicate() if b'The operation completed successfully.' not in output.lower(): print("Error adding new Wi-Fi profile.") return False command_connect = ['netsh', 'wlan', 'connect', f"name={profile_name}"] response = subprocess.run(command_connect, capture_output=True) success_message = "The connection request was completed successfully." failure_message = "The connection attempt failed." if success_message in str(response.stderr.decode()).lower(): return True elif failure_message in str(response.stderr.decode()).lower(): return False else: raise ValueError("Unexpected error occurred while trying to connect.") except Exception as e: print(e) return False if __name__ == "__main__": wifi_connected = check_wifi_status() if not wifi_connected: ssid = input("Enter your WiFi SSID:") pwd = input("If required enter WiFi password:") outcome = connect_to_wifi(ssid=ssid, password=pwd if pwd != "" else None) message = "Connected!" if outcome else "Connection Failed!" print(message) ``` 这段代码首先定义了一个用于检查当前是否有有效Wi-Fi连接的功能；接着是一个能够根据给定SSID（无线网络名称），可选地还有密码参数去尝试建立新连接的功能。最后部分展示了当发现未连接时如何让用户输入必要的信息完成连接过程[^2]。