Does the COVERAGE library take effect on the abnormal treatment of the Python program?

"Whether the Coverage Library Extra Procession Effective" in the Python program is effective " Summary: Abnormal treatment is an indispensable skill in programming, which can help us capture abnormalities during the program operation and perform corresponding treatment.We can use the COVERAGE library to measure the test coverage in our code.However, in the Python program, when using the COVERAGE library, we need to pay attention to whether the abnormal treatment can be captured and recorded correctly. This article will discuss and answer this. introduction: When developing and maintaining large Python programs, the quality and integrity of the code usually needs to be ensured.To achieve this goal, we often use unit testing and code coverage tools.Among them, the COVERAGE library is widely used to calculate the test coverage in our code.However, we need to confirm whether the COVERAGE library can correctly capture and record these abnormalities when there are abnormalities in the code. question: When using the COVERAGE library in the Python program, does the abnormal treatment take effect? answer: Under normal circumstances, the COVERAGE library will capture and record abnormalities in the program.When abnormalities occur, the Coverage library will record the abnormal occurrence in the report.However, in some cases, we need to pay more attention to ensure the accuracy of abnormal treatment. In the program, sometimes we use the Try-Except statement block to capture and handle abnormalities.We can place the code that may occur in the TRY statement block, and then use the Except statement block to deal with the captured abnormalities.However, we should pay attention to using the Try-EXCEPT sentence block, we need to ensure that the COVERAGE library can correctly detect the abnormal processing path we pay attention to.Specifically, we need to cover the code that may cause abnormalities in TRY and verify whether the Covera report contains this part of the code. The following is a simple example code: def divide(a, b): try: result = a / b except ZeroDivisionError: result = None return result def test_divide(): assert divide(4, 2) == 2 assert divide(4, 0) is None test_divide() In the above code, we define a `DIVIDE` function to execute the division of two numbers.In the `try` block, we carried out the division of operations and used the` Except ZerodivisionError` to capture the `ZerodivisionError`.When the division is 0, the result is set to `None`. Next, we define a `test_divide` function used to test the` Divide` function.We use two assertive sentences to test two different inputs.`Divide (4, 2)` The assertion verified that the normal division of operation results were 2, and the assertion of `DIVIDE (4, 0)` verified that the processing result of the division was 0 was `None`. We can use the COVERAGE library to run the test and generate a coverage report.Execute the following command in the code: coverage run -m pytest test.py After the execution is completed, we can use the following command to generate code coverage report: coverage report In the report, we can view the coverage of the `Divide` function.If all abnormal treatment paths are covered, it can be confirmed that the abnormal processing is effective under the monitoring of the COVERAGE library. However, in some cases, our code may have other abnormalities or errors, even after abnormal processing.These abnormalities may cause the program to collapse or produce unpredictable results.Therefore, we need to pay attention to our code at all times and ensure that any possible abnormalities are processed correctly. in conclusion: When using the COVERAGE library in the Python program, it captures and records abnormalities in the program.However, we need to ensure that the abnormal processing path is correctly covered and recorded in the COVERAGE report.By paying close attention to code and testing cases, and using the Try-Except statement to capture and process abnormalities, we can ensure that the abnormal processing is effective under the COVERAGE library.However, we need to pay attention to the potential abnormalities in the code at all times and ensure that they are properly handled.