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Python crawler crawl complete novel Python version: Python 3.0 x Running platform: Windows preface Web crawler (also known as web spider, web robot, more often called web chaser in FOAF community) is a program or script that automatically grabs World Wide Web information according to certain rules. Other infrequently used names include ...

Introduction to Numpy NumPy(Numerical Python) is a basic library of scientific computing, which provides a large number of functions related to scientific computing, such as data statistics, random number generation and so on. The core type it provides is multi-dimensional array type (ndarray), which supports a large number of dimensi ...

1. Basic concepts AMQP protocol: Advanced message queuing protocol, a network protocol for asynchronous message transmission between processes. rabbitmq is developed based on AMQP protocol General workflow: Publisher - > exchange - > queue - > consumer Broker: agent, consisting of Exchange and Queue The process of connecting produce ...

Basic concepts of Python exception handling prit('hehe') route File "c:\Users\wyw15\Desktop\python code\testpython_5\test.py", line 3, in <module> content prit('hehe') Name: undefined name“ prit" NameError: name 'prit' is not defined This looks like an exception, but it's actually an exception thrown by the program Throw exce ...

Note: This article is after learning acwing Basic algorithm Course It is mainly used to record the template of python version algorithm. 1. Quick sort Thought: Divide the list with a number (pivot) in the list. The number on the left is less than pivot and the number on the right is greater than pivot. Steps: 1. Determine pivot. Left, right, ...

Set element wait: webdriver provides two types of element waiting: explicit waiting and implicit waiting 1, Explicit wait Explicit wait means that the webdriver continues to execute when a condition is satisfied. Otherwise, a timeout exception will be thrown when the maximum time is reached from selenium import webdriver from selenium.webdriv ...

Northwest University of technology NOJ-Python programming problem set: Noj Python Programming: Season 1: season 1-easy (1-10) Noj Python Programming: Season 2: Season 2 snippet (11-20) Noj Python Programming: Season 3: season 3-loop (21-30) NOJ-Python programming: Season 4: enumeration algorithm (31-40) NOJ-Python programming: Season 5: modular ...

1 exploratory data analysis Data were used: Pima Indian diabetes prediction dataset. Link: https://pan.baidu.com/s/17M7UfnqGYTkpLmCXUOyTkw Extraction code: y4fz import pandas as pd pima_column_names = ['times_pregnant', 'plasma_glucose_concentration', 'diastolic_blood_pressure', 'triceps_thickness', ' ...

Chapter 3: digital date and time It is very simple to perform mathematical operations of integers and floating-point numbers in Python. However, if you need to perform fractions, arrays, or date and time operations, you have to do more work. This chapter focuses on these topics. 3.1 rounding of figures problem You want to round a floati ...

Pre knowledge Iteration: iteration is the activity of repeating the feedback process, and its purpose is usually to approach the desired goal or result. Each repetition of a process (function) is called an "iteration", and the result of each iteration (function return) will be used as the initial value of the next iteration (paramete ...