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1. Variables and simple data types 1.1 string A string is a series of characters. In Python, strings are enclosed in quotation marks, which can be single quotation marks or double quotation marks, as shown below: "This is a string." 'This is also a string.' This flexibility allows you to include quotation marks and apostrophes in strin ...

This article is taken from WeChat official account GitPython: Ten common Python automation operations . In case of infringement, the contact must be deleted. 1. OS module Import: import os 1. Traverse the folder The premise of batch operation is to traverse the folder, OS Walk traverses the folder and generates three parameters: Current ...

1, HMM word segmentation idea HMM implements word segmentation as a sequence annotation task of words in a string. The basic idea is that each word occupies a certain word formation position (i.e. word position) when constructing a specific word. It is stipulated that each word can only have four word formation positions at most, i.e ...

In the process of writing this article, we refer to the content of the course "Introduction to Python Programming and data science" by Mr. Hu Junfeng. Concept: Multiple tasks should be carried out simultaneously at one time, but not necessarily at the same time.Parallel: promote multiple tasks at the same time in a period of time, a ...

Arthas online analysis, diagnosis and tuning tool In the past, when we wanted to troubleshoot online problems, we usually used the tuning tools and commands provided by jdk. The most common is the dump online log, which is then downloaded locally and imported into the jvisual VM tool. There are many changes in this operation. The Arhtas tool d ...

Introduction to JSON JSON(JavaScript Object Notation), namely JavaScript object notation, is a lightweight and general text data format. JSON syntax supports objects, arrays, strings, numbers (int/float), and true/false and null. JSON has a strict format. The main formats are as follows: You can only use double quotation marks, not single quo ...

The use of selenium in reptiles I selenium overview 1.1 definitions Selenium is a Web automated testing tool, which was originally developed for website automated testing. Selenium can directly call the browser. It supports all mainstream browsers (including PhantomJS, which has no interface). It can receive instructions and let the browser ...

usage matplotlib.pyplot.scatter(x, y, s=None, c=None, marker=None, cmap=None, norm=None, vmin=None, vmax=None, alpha=None, linewidths=None, *, edgecolors=None, plotnonfinite=False, data=None, **kwargs) Parameter introduction x,yData for plotting scatter plotsfloat or array-like, shape(n,)sA real number or an array with the size of (n,), an ...

Experiment 3.1: text file operation Title Description: create a new program called test Txt file, stored in the directory where the code file is located, and open the file. Then write the contents as shown in Figure 1-1 to the file. Finally, read 5 characters, read the first line of string, read the third line of string, and read all strings. ...

Introduction This article is based on PY3 8，system win10，numpy1.12. np is the abbreviation of numpy. 1, Summary of reference sources and basic knowledge Performance comparison between python built-in max() and min() functions and Numpy built-in max() and min() functions Based on python 2.7.15 and system win10, the above article draws ...