To create a Python virtual environment, you can use the venv module. The steps are: 1. Enter the project directory to execute the python-mvenvenv environment to create the environment; 2. Use sourceenv/bin/activate to Mac/Linux and env\Scripts\activate to Windows; 3. Use the pipinstall installation package, pipfreeze>requirements.txt to export dependencies; 4. Be careful to avoid submitting the virtual environment to Git, and confirm that it is in the correct environment during installation. Virtual environments can isolate project dependencies to prevent conflicts, especially suitable for multi-project development, and editors such as PyCharm or VSCode are also

First,checkiftheFnkeysettingisinterferingbytryingboththevolumekeyaloneandFn volumekey,thentoggleFnLockwithFn Escifavailable.2.EnterBIOS/UEFIduringbootandenablefunctionkeysordisableHotkeyModetoensurevolumekeysarerecognized.3.Updateorreinstallaudiodriv

Use checked exceptions to indicate recovery errors, and unchecked exceptions to indicate programming errors; 2. After catching exceptions, they must be processed, recorded or re-throwed, and must not be ignored; 3. Throw exceptions as soon as possible when errors occur, and delay capture at the top of the call chain; 4. Provide clear context information when throwing exceptions to avoid vague descriptions; 5. Use try-with-resources to automatically manage resource closure to prevent resource leakage; 6. Avoid catching broad exceptions such as Exception or Throwable, and specific exception types should be captured; 7. Custom exceptions should contain semantic error information and context data; 8. Exceptions should not be used to control normal program flow to avoid performance losses; 9. Record exceptions

Computed has a cache, and multiple accesses are not recalculated when the dependency remains unchanged, while methods are executed every time they are called; 2.computed is suitable for calculations based on responsive data. Methods are suitable for scenarios where parameters are required or frequent calls but the result does not depend on responsive data; 3.computed supports getters and setters, which can realize two-way synchronization of data, but methods are not supported; 4. Summary: Use computed first to improve performance, and use methods when passing parameters, performing operations or avoiding cache, following the principle of "if you can use computed, you don't use methods".

Method overloading and method overloading are two mechanisms for implementing polymorphism in Java. 1. Method overload occurs in the same class. It requires the same method name but different parameter list (number, type or order of parameters), which belongs to compile-time polymorphism. The return type can be different but cannot be overloaded by the return type alone. There can be different access modifiers and exception declarations; 2. Method rewriting occurs in the inheritance relationship. The subclass provides the specific implementation of the existing methods of the parent class. It requires the same method signature and the return type is compatible. The access modifier cannot be more strict. It belongs to the runtime polymorphism. The instance method must be used and the correct rewrite can be ensured through the @Override annotation. Together, the two improve code readability and scalability.

Run the child process using the os/exec package, create the command through exec.Command but not execute it immediately; 2. Run the command with .Output() and catch stdout. If the exit code is non-zero, return exec.ExitError; 3. Use .Start() to start the process without blocking, combine with .StdoutPipe() to stream output in real time; 4. Enter data into the process through .StdinPipe(), and after writing, you need to close the pipeline and call .Wait() to wait for the end; 5. Exec.ExitError must be processed to get the exit code and stderr of the failed command to avoid zombie processes.

UseEventMPMforhigh-concurrencyworkloads,especiallywithPHP-FPM,orPreforkonlyifrequiredbynon-thread-safemodules.2.EnableKeepAlivewithMaxKeepAliveRequestssetto100andKeepAliveTimeoutbetween2–5secondstobalanceconnectionreuseandresourceusage.3.ConfigureEve

Usetracemalloctotrackmemoryallocationsandidentifyhigh-memorylines;2.Monitorobjectcountswithgcandobjgraphtodetectgrowingobjecttypes;3.Inspectreferencecyclesandlong-livedreferencesusingobjgraph.show_backrefsandcheckforuncollectedcycles;4.Usememory_prof