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Python APScheduler timed task framework 0. Introduction APScheduler is based on a python timing task framework of Quartz, which realizes all functions of Quartz and is very convenient to use. It provides tasks based on date, fixed time interval and crontab type, and can persist tasks. Based on these functions, we can easily implement a pyt ...

Previous: Python learning notes (6) -- game project (1) Python learning notes (VII) -- game project (2) Spaceship shooting Update class Now add shooting function to the ship The bullet will travel up the screen and disappear when it reaches the upper edge of the screen. First, we need to update settings Py, in__ init__ () store the value requi ...

Private properties and private methods 01. Application scenario and definition method Application scenario In actual development, some properties or methods of an object may only be used inside the object rather than being accessed outsidePrivate properties are properties that an object does not want to exposeA private method is a method ...

Number of occurrences of 1 in jz31 integers (from 1 to the number of occurrences of 1 in n integers) describe Enter an integer n and find the number of occurrences of 1 in the decimal representation of N integers 1 ~ n For example, the numbers 1, 10, 11, 12 and 13 containing 1 in 1 ~ 13 appear 6 times in total thinking Direct method: splice ...

preface This article actually belongs to: Advanced way of Python [AIoT phase I] This paper introduces Matplotlib data visualization, and will send a separate article on advanced Matplotlib data visualization and advanced Matplotlib data visualization for readers to learn. In data analysis and machine learning, we often use a lot of visu ...

catalogue 1, Decorator supplement Decorator belt parameters 2, Object oriented 1. Object oriented and process oriented 2. Class and object 3. Object oriented basic syntax (1) Create class (method only) (2) Create object (3) Introduction to initialization method (4)__ del__ Method introduction (5)__ str__ method 4. Object oriented en ...

© Fu Xianjun. All Rights Reserved. Today, Xiao Zhao took you into the third part of openCV, image color is used for geometric transformation. The case still passed our little Fu teacher, a man who works day and night for us! preface Common color spaces can include GRAY color space, XYZ color space, HVS color space, etc. next, I w ...

Magic method There is a method in Python called magic method. The methods provided in Python classes that start with two underscores and end with two underscores are magic methods. The magic methods will be activated and executed automatically when appropriate. Two characteristics of magic methods: There are two underscores on both sides;The ...

Children's shoes who often play with crawlers know the importance of cookies. So far, most websites still use cookies to identify their login status, and only a few websites upgrade to use jwt to record their login status. The function of extracting cookies is self-evident. What are the high-end operations of extracting cookies? Watch: Pu ...

1. Introduction Open source address: https://github.com/zhanggao2013/AmazingQuant AmazingQuant is an open source framework for quantitative backtesting transactions based on event driven. The following figure shows the overall framework. data_center to_mongoDB stores market, financial and other data to the storage module of MongoDB get_ ...