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Before we explain our crawler, we will first outline the simple concept of crawler (after all, it is a zero foundation tutorial) Reptile Web crawler (also known as web spider, web robot) is a program that simulates the browser to send web requests and receive request responses. It is a program that automatically grabs Internet information acc ...

Catalog Preface Create a matrix (using ndarray objects) Get the number of rows and columns of a matrix (in two dimensions) Interception of Matrix Intercept by row and column Conditional interception Combination of matrices Create Matrix by Function arange  linspace logspace ones,zeros,eye,empty fromstring fromfunction Operations ...

Catalog Basic Theory (HSV) Why use HSV space instead of RGB space? HSV 1. Hue (hue) 2. Value (lightness) 3. Saturation Effect Display I. Initialization Slider initialization 1. Create callback functions 2. Window Settings (Name) 3. Slider bar settings Code 2. Motion Functions 3. Helicopter Control 4. Obtaining binary maps in HSV ...

Writing this chat robot is purely fun, it is not practical!!! Realization idea In the past, many wechat robots relied on the itchat in python to write, because at that time, the wechat web page was still developed for most users, and the itchat module operated on the wechat web page (it felt like a crawler). But now many people's wechat ca ...

September 15 knowledge sorting 1, Variable 1. Define multiple variables at the same time 1) Define the same value of multiple variables at the same time: Variable name 1 = variable name 2 = variable name 3 =... = Data Example: x = y = z = 0 print(x, y, z) 2) Define multiple variables at the same time and as ...

Zero basis entry financial risk control - loan default forecast 1, Competition data The task of the competition is to predict whether users default on their loans. The data set can be seen and downloaded after registration. The data comes from the loan records of A credit platform. The total amount of data exceeds 120w, including 47 columns o ...

         First, the first question: what is tensorflow?   It is an open source software library for solving numerical calculation based on data flow graph. Now it is mainly used for in-depth learning. In my understanding, tensorflow can complete the construction of neural network and carry out a ser ...

hello everyone! I'm Lin hero You know which is the hottest mobile game at present. Yes, it is the glory of the king. This mobile game must have been heard or played by everyone. There are 106 heroes and hundreds of hero skins. Today I'll teach you to climb down hundreds of skins. catalogue Python Basics Python built-in function zip Python ...