python Foundation: producer and consumer model under multiprocess

Introduction to producer consumer model 1. Why the producer consumer model is needed Producer refers to the task of production data, and consumer refers to the task of consumption data. When the producer's production capacity is far greater than the consumer's consumption capacity, the producer needs to wait for the consumer to consume before c ...

Posted by Spaceboy on Fri, 08 May 2020 12:27:28 +0200

Python 3 quick start tutorial errors and exceptions

There are at least two types of errors in Python: syntax errors and exceptions. syntax error Syntax errors are also called parsing errors: >>> while True print('Hello world') File "<stdin>", line 1 while True print('Hello world') ^ SyntaxError: invalid syntax The parser indicates the error line ...

Posted by bigger on Thu, 07 May 2020 10:12:10 +0200

Charles grabs the package and turns it into interface automation test case

We can get the json file to be parsed and convert it to json for saving by using Charles to grab the package and transfer the interface automation test case. So let's read it. First of all, let's look at the last document,    {   "config": {   "name": "testcase description",   "variables": {}   },   "teststeps": [   ...

Posted by saami123 on Wed, 06 May 2020 16:46:24 +0200

(Python Basic Tutorial VIII) list operation in Python

Python Basic Tutorial Configuring the Python environment in SublimeEditor Add comments to Python code Use of variables in Python Data types in Python Keyword in Python Python string operations list operation in Python Tuple operation in Python Pythonmax() and min() - Find the maximum and minimum values in a list or array Python finds the large ...

Posted by smallflower on Wed, 06 May 2020 03:17:12 +0200

1-20 crawler urlib module

cookie usage for urlib: If you already know the cookie, or the cookie you obtained through packet grabbing, you can log in directly in the header's information; The cookie information on the website of Jingdong is different from that on the website of Jingdong, You can log in to JD, grab the cookie information, and t ...

Posted by clanstyles on Wed, 06 May 2020 02:06:44 +0200

9. Three times class (December 20) 17.3 / 17.4 cellular multi instance 17.5 cellular and scheduled tasks

9. Three classes (December 20) 17.3 / 17.4 cellery multi instance Multiple worker s, multiple queues [root@localhost celery]# cat tasks.py #!/usr/bin/env python #-*- coding:utf-8 -*- from celery import Celery app = Celery() app.config_from_object("celeryconfig") @app.task def taskA(x,y): return x + y @app.task de ...

Posted by neostrife on Tue, 05 May 2020 21:39:28 +0200

Magic method - simple customization (\\\\\\\\\\\\\\\\\\\

Reading notes: Both repr and str are used for display. str is user oriented, while repr is programmer oriented. repr means representation and description. To display objects using print(Object), you need to refactor str. To directly input class objects for printing, you need to refactor the repr. In python, str is us ...

Posted by wing_zero on Tue, 05 May 2020 08:20:42 +0200

LeetCode -- longest substring without duplicate characters

LeetCode -- longest substring without duplicate characters Blog Description The information in this article comes from the Internet and personal summary, which is intended to summarize personal learning and experience. If there is any infringement, please contact me to delete it. Thank you! Explain leetcode Question, Interview 48 The longest ...

Posted by calevans on Sun, 03 May 2020 05:39:23 +0200

RedisLive installation configuration

Installation environment: CentOS release 6.5 (Final) 64 bit 1. Install Python Python 2.6 comes with CentOS, but pip does not support this version. You need to upgrade Python to 2.7 first, and python 2.6 is required for yum, so Python needs to coexist with 2.6 and 2.7 # Install compilation tools and dependency Librari ...

Posted by free2code on Sat, 02 May 2020 08:38:18 +0200

python Programming (multiprocessing Library)

[notice: All Rights Reserved. Please reprint. Do not use for commercial purposes. Contact email: feixiaoxing@163.com] Because there are not many opportunities to write multiple processes, we do not pay much attention to this aspect. Therefore, the multi process code has not been mastered. In fact, from the bottom of my heart, I know that mu ...

Posted by gabereiser on Sat, 02 May 2020 05:18:09 +0200