By default, Python source files are encoded in UTF-8. In this way, the characters of most languages in the world can be used in string literal, variable, or function name and comment at same time, although the standard library uses only regular ASCII characters for variable or function names, any portable code should follow this …
The Python Operator module allows it to support functional programming. Suppose we need a function to calculate factorial, the general approach is to use recursion. If you use functional programming, there are two ways, one is to use lambda, the other is to use the arithmetic function of the Python Operator module.
Web form is the basic component of a web application. It is a part of an HTML web page that is responsible for data collection. A web form consists of three parts: a form label, a form field, and a form button. Forms allow users to enter data and submit the user-entered data to web …
Python crawler can crawl not only static web pages but also dynamic web pages. However, the new version of selenium doesn’t support PhantomJS and can’t crawl dynamic web pages. Therefore, we should abandon PhantomJS and use headless ChromeDriver directly. This article will tell you how to install ChromeDriver.
Session is a data structure saved on the server-side, which is used to track the status of users. This data can be saved in clusters, databases, and files. Cookie is a mechanism for clients to save user data, and it is also a way to implement Session. This article introduces how to manage Session and …
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