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This article introduces the relevant knowledge of "what are the interview questions for Python". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. What is Python programming? He will encourage you to compare with other languages.

Answer:

Python is an object-oriented language. Unlike other encapsulated languages such as C, there is no need to compile before running Python code.

Python is a dynamically typed language, so when you declare a variable, you don't need to specify the type of the variable. For example, X = 111 programs will not report errors, but not necessarily in other languages.

The Python code is simple, so it is fast to write, but it runs slower than the compiled language. But Python can be embedded with C language programming, so we can solve this problem. Example: the numpy module runs very fast, but its arithmetic operations are not implemented by Python.

Python has a wide range of uses, such as crawler, web, operation and maintenance, big data, artificial intelligence, etc., which can help other languages and components improve their performance, so it is called "glue language".

Python has a rich third-party library, so programmers can focus on algorithm and data structure design without having to deal with the underlying details.

I don't think there is any need to explain why the interviewer asked this question.

2. Supplement the missing code in the following code

Answer

Let you write code, of course, on the one hand, it can test the rigor of your code. Whether the naming convention is unified or not.

Recursive functions need not only recursion but also termination, otherwise there will be endless calls to the stack to see if you understand how it works.

Use the os module to interact with the operating system, and the interaction mode can be cross-platform. The code sChildPath = sPath +'/'+ sChild will report errors on Windows systems.

When you don't know what the code needs to do, you can ask boldly, or you won't be able to answer the question.

Recursion is very important in Python, and it also tests whether you know how to interact with your operating system.

3. What is the final value from A0Query A1 to An

The meaning of the question:

List parsing has a significant improvement in efficiency, but it is also a learning disability for many people.

Some of the Python code is deliberately weird to let you know that this may be the case with your colleagues in the future.

4. What is the multithreading of Python? Give an example of how Python code runs in parallel.

The multithreading of Python is fundamentally different from other languages. Python does have multi-thread packages, but there is a GIL in Python that makes only one of your multiple threads executed all the time, so it doesn't make any sense to improve code efficiency.

But when we want to perform some tasks at the same time, regardless of efficiency, it is convenient to use the threading package.

The problem is crucial: many developers who have studied other programming languages always do not believe in multithreading and do not look back without touching the south wall, which actually depends on your level.

5. Look at the code and write the output result

Answer

The results of the output are expressed in comments:

Why do you ask this question:

Understanding objects is the core of Python programming, testing whether you understand inheritance and the use of super functions in Python.

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