帮我用python写一段程序:判断cameraid在不在vst_left变量中
时间: 2024-05-13 15:14:23 浏览: 13
当您提到变量时,我们需要知道变量的类型和值,才能编写程序来判断某个值是否在变量中。在这里,假设vst_left是一个列表(list)类型的变量,包含了多个cameraid值,那么我们可以使用in关键字来判断某个值是否在列表中。下面是一个简单的Python代码示例:
```python
# 定义变量vst_left为一个包含多个cameraid的列表
vst_left = [1, 2, 3, 4, 5]
# 定义一个cameraid变量
cameraid = 3
# 使用in关键字判断cameraid是否在vst_left列表中
if cameraid in vst_left:
print("cameraid在vst_left变量中")
else:
print("cameraid不在vst_left变量中")
```
在这个例子中,我们定义了vst_left变量为包含1到5的整数列表。然后我们定义了一个cameraid变量,并使用if语句和in关键字来判断cameraid是否在vst_left中。如果cameraid在vst_left中,则打印"cameraid在vst_left变量中",否则打印"cameraid不在vst_left变量中"。
相关问题
帮我用java语言在Android studio上写一个安卓手机的相机软件程序
很高兴为您提供帮助。下面是一个简单的 Java 代码片段,可以在 Android Studio 上创建一个基本的相机应用程序:
首先,您需要在 AndroidManifest.xml 文件中添加以下权限:
```
<uses-permission android:name="android.permission.CAMERA" />
```
然后,您可以使用 Camera2 API 进行编码,如下所示:
```
public class CameraActivity extends AppCompatActivity {
private static final String TAG = "CameraActivity";
private static final int REQUEST_CAMERA_PERMISSION = 1;
private CameraManager mCameraManager;
private String mCameraId;
private CameraDevice mCameraDevice;
private CameraCaptureSession mCameraCaptureSession;
private CaptureRequest.Builder mCaptureRequestBuilder;
private TextureView mTextureView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
mTextureView = findViewById(R.id.texture_view);
mCameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
for (String cameraId : mCameraManager.getCameraIdList()) {
CameraCharacteristics characteristics = mCameraManager.getCameraCharacteristics(cameraId);
if (characteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK) {
mCameraId = cameraId;
break;
}
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
protected void onResume() {
super.onResume();
openCamera();
}
@Override
protected void onPause() {
closeCamera();
super.onPause();
}
private void openCamera() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
return;
}
try {
mCameraManager.openCamera(mCameraId, mCameraDeviceStateCallback, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void closeCamera() {
if (mCameraCaptureSession != null) {
mCameraCaptureSession.close();
mCameraCaptureSession = null;
}
if (mCameraDevice != null) {
mCameraDevice.close();
mCameraDevice = null;
}
}
private final CameraDevice.StateCallback mCameraDeviceStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(@NonNull CameraDevice camera) {
mCameraDevice = camera;
createCameraPreviewSession();
}
@Override
public void onDisconnected(@NonNull CameraDevice camera) {
camera.close();
mCameraDevice = null;
}
@Override
public void onError(@NonNull CameraDevice camera, int error) {
camera.close();
mCameraDevice = null;
finish();
}
};
private void createCameraPreviewSession() {
SurfaceTexture texture = mTextureView.getSurfaceTexture();
assert texture != null;
texture.setDefaultBufferSize(1920, 1080);
Surface surface = new Surface(texture);
try {
mCaptureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
mCaptureRequestBuilder.addTarget(surface);
mCameraDevice.createCaptureSession(Collections.singletonList(surface),
new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession session) {
mCameraCaptureSession = session;
try {
mCameraCaptureSession.setRepeatingRequest(mCaptureRequestBuilder.build(),
null
File "F:\sleep\fatigue_detecting.py", line 60, in cameraid_choice frame1.cameraid_choice() TypeError: cameraid_choice() missing 2 required positional arguments: 'self' and 'event'怎么修改,使得不报错
这个错误是因为你的 `cameraid_choice()` 方法需要两个参数 `self` 和 `event`,但是你在调用该方法时并没有传递这两个参数。
解决方法是在调用方法时,使用实例对象来调用,比如 `frame1.cameraid_choice(self, event)`。或者,在方法定义时,将 `self` 和 `event` 参数设置为可选参数,这样就不需要在调用时传递这两个参数了。
例子1:
```
class MyFrame:
def cameraid_choice(self, event):
# 方法体
pass
frame1 = MyFrame()
frame1.cameraid_choice(self, event) # 传递 self 和 event 参数
```
例子2:
```
class MyFrame:
def cameraid_choice(self, event=None):
# 方法体
pass
frame1 = MyFrame()
frame1.cameraid_choice() # 不需要传递 self 和 event 参数
```