Python interview questions summary

Python syntax and other basic parts#

1. Mutable and immutable types;
   Answer: When defining variables (objects):
   Every time an object is created, the object will have: id, type, and value.
   id: reaction memory address
   type: Objects have their own types, different types have different characteristics, and different methods
   value: data

Variable type:

• You can modify the value of the object, and the memory address of the object remains unchanged after modification
• Variable types include: list, dictionary, variable collection

Immutable type####

• The value changes, the memory address changes, which is equivalent to redefining
• When trying to modify the object element, the memory space is actually reopened for storage
• Immutable types are: number, tuple, string, immutable collection
• For immutable types of objects, none of them involve modification methods, you will get an error if you try to use them

1. The realization method and difference between shallow copy and deep copy; how to realize deepcopy if you design it;
2. The difference between new() and init();

You know several design patterns;

Have you understood encoding and decoding;

The pros and cons of list comprehension and generator;

What is a decorator; if you want to decorate after a function, what should be done;

Hand-write a singleton pattern implemented using decorators;

What is the difference between a singleton using a decorator and a singleton using other methods in subsequent use;

Handwriting: regular email address;

Introducing garbage collection: reference counting/Generational collection/Isolated reference ring

The difference between multi-process and multi-thread; what is suitable for CPU-intensive;

There are several ways of process communication;

Introduce the coroutine, why it is faster than the thread;

The difference between range and xrange (my sister’s py3...);

Author: Love techniques fairy sauce
Link: https://www.jianshu.com/p/de345e713f4c
Source: Brief Book
The copyright belongs to the author. For commercial reprints, please contact the author for authorization. For non-commercial reprints, please indicate the source.