Programmer Think

Today is another day submerged by pouring demand. Does anyone know where to sign up for the chicken soup class of "I cut 18 demands for me in three sentences" and want to apply. The class of "understanding applause" is even more difficult. Going further, back to our topic today, let's understand the catalogue of this ...

I use Python 3.7.0 PostgreSQL can integrate with Python using the psychopg2 module. sycopg2 is a PostgreSQL database adapter for the Python programming language.   Psychopg2 is very small, fast and stable. You do not need to install this module separately, as it will follow Python 2.5.0 by default Released with version X. pip3 instal ...

preface First of all, the blogger taught himself the theoretical knowledge of the first 10 chapters of python programming from introduction to practice. He thought he needed to do some projects to consolidate and test his self-study achievements, so he chose the alien invasion project to practice. The article is only used as my study notes i ...

Tide information analysis (1) Climb cninfo Vanke A website to download pdf (2) Filter specified fields from pdf (3) Visual analysis using python preface Bloggers need to crawl the pdf of the annual report of the specified company in the tide information, download it, filter the specified fields of the pdf, and then conduct visual analys ...

pytest environment deployment After the python environment is successfully installed pip install pytest By default, pytest reads all folders and files starting with test.fixture is a powerful tool in pytest.Assertion mechanism: assert.PIP pytest html installation test report pytest command By default, pytest looks for folders, files and fun ...

1, Overall thinking For example, the goal achieved through this project is to increase the number of blog visits. How can we achieve this goal? Traffic is a step that we click on the corresponding articles through the browser or mobile APP. Can we simulate our behavior through python to increase the traffic? Just do it! Let's go! To simula ...

1, Brush question content Original question link https://leetcode-cn.com/problems/restore-the-array-from-adjacent-pairs/ Content description There is an integer array nums composed of n different elements, but you can't remember the specific content. Fortunately, you still remember each pair of adjacent elements in num. Give you a two- ...

Transmission model hierarchical model Description of each layerOSI seven layer network modelTCP/IP four layer network modelCorresponding protocolStandard interface for network communication of operating system or applicationapplication layerapplication layerTelnet,FTP,SMTP,DNS,HTTPConvert different coding methods into standard forms used ...

prefaceIn short, the Internet is a large network composed of sites and network devices. We visit sites through the browser, and the site returns HTML, JS and CSS codes to the browser. These codes are parsed and rendered by the browser to present colorful web pages in front of us;1, What is a reptile?If we compare the Internet to a large spider ...

1: Image addition You can use the function CV2 Add() adds two images. Of course, numpy, res=img1+img can also be used directly. The size and type of the two images must be the same, or the second image can make a simple scalar value. Note: addition in OpenCV is different from addition in Numpy. OpenCV addition is a saturation operation, whil ...