Create a theme switching component, use the checkbox to bind the isDarkMode state and call the toggleTheme function; 2. Check localStorage and system preferences in onMounted to initialize the theme; 3. Define the applyTheme function to apply the dark-mode class to the html element to switch styles; 4. Use CSS custom properties to define bright and dark variables, and overwrite the default styles through the dark-mode class; 5. Introduce the ThemeSwitcher component into the main application template to display the toggle button; 6. Optionally listen to prefers-color-scheme changes to synchronize the system theme. This solution uses Vue

Use multiprocessing.Queue to safely pass data between multiple processes, suitable for scenarios of multiple producers and consumers; 2. Use multiprocessing.Pipe to achieve bidirectional high-speed communication between two processes, but only for two-point connections; 3. Use Value and Array to store simple data types in shared memory, and need to be used with Lock to avoid competition conditions; 4. Use Manager to share complex data structures such as lists and dictionaries, which are highly flexible but have low performance, and are suitable for scenarios with complex shared states; appropriate methods should be selected based on data size, performance requirements and complexity. Queue and Manager are most suitable for beginners.

Use boto3 to upload files to S3 to install boto3 first and configure AWS credentials; 2. Create a client through boto3.client('s3') and call the upload_file() method to upload local files; 3. You can specify s3_key as the target path, and use the local file name if it is not specified; 4. Exceptions such as FileNotFoundError, NoCredentialsError and ClientError should be handled; 5. ACL, ContentType, StorageClass and Metadata can be set through the ExtraArgs parameter; 6. For memory data, you can use BytesIO to create words

Install Certbot and its Apache plug-in; 2. Run Certbot to obtain the certificate and configure the domain name; 3. Optionally configure automatic redirection from HTTP to HTTPS; 4. Set up automatic renewal and pass dry-run test; 5. Verify the installation and ensure the normal reload configuration of Apache. After the certificate is successfully deployed, renewal will be automatically managed. After the entire process is completed, secure HTTPS access can be achieved.

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KeepAliveOn enables persistent connections; 2.MaxKeepAliveRequests100 sets the maximum number of requests per connection; 3.KeepAliveTimeout5 sets the timeout for waiting for subsequent requests, restart Apache after configuration and use curl or browser developer tools to verify whether KeepAlive is effective to optimize server performance.

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