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This article mainly explains "what are the common interview questions in Python". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what common interview questions does Python have"?

1. How does python perform type conversion?

Python provides built-in functions to convert variables or values from one type to another. For example, the int function can convert numeric strings that conform to mathematical formats to integers. Otherwise, an error message is returned.

2. How does python manage memory?

Python refers to a memory pool (memory pool) mechanism, namely the Pymalloc mechanism (malloc:n. Allocate memory), which is used to manage the application and release of small blocks of memory.

3. What is the difference between the items () method of dict and the iteritems () method?

The items method returns all dictionaries as a list, where items are returned in no special order

The iteritems method has a similar effect, but returns an iterator object

4. What is the lambda function? What are the benefits of it?

Lambda expressions mentioned in programming are usually used when you need a function but do not want to bother to name a function, that is, an anonymous function.

Python allows you to define a small one-line function. The form of the lambda function is defined as follows: labmda parameter: the expression lambda function returns the value of the expression by default. You can also assign it to a variable. The lambda function can accept any parameter, including optional parameters, but there is only one expression.

5. Explain the different os,sys modules, and list the common module methods?

Official explanation: os:This module provides a portable way of usingoperating system dependent functionality. Provides a convenient way to use operating system functions. Sys:This module provides access to some variablesused or maintained by the interpreter and to functions that interact stronglywith the interpreter. Provides access to variables used or maintained by the interpreter and functions used in interaction with the interpreter.

Common methods of os

Common methods of sys

6. How to copy an object in python? The difference between deepcopy and copy?

Copy copies only the object itself, not other objects referenced in the object.

Deepcopy copies not only the object itself, but also other objects referenced in the object.

7. What's the difference between os.path and sys.path?

Os.path is a module that contains various functions that deal with long file names (pathnames).

Sys.path is a list of directory names from which python looks for extension modules (python source module, compiler module, or binary extension). When starting python, this list is initialized according to built-in rules, the contents of PYTHONPATH environment variables, and the registry (Windows system).

8. What is the difference between match and search methods in re module?

The match () function only checks whether RE matches at the beginning of the string, while search () scans the entire string.

9. Explain the difference between a generator and a function, and implement and use a simple generator?

The main difference between a generator and a function is the function return avalue, where the generator yield avalue marks or remembers the point of the yield at the same time to resume execution from the marker point on the next call. Yield converts the function to a generator, which in turn returns an iterator.

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