Python

Dict Python built-in dictionary: dict support, Dict full name dictionary, in other languages also known as map, using key-value (Key-value) storage, with a very fast search speed. For example, suppose you want to find the corresponding score

When we pass in a function, there are times when we don't need to explicitly define a function, and it's easier to pass in an anonymous function directly. In Python, there is a limited amount of support for anonymous functions. As an example of

I have met once before, this time in the group also encountered a few times a problem A program written in python2.7, which uses a dictionary derivation, but the server version is python2.6, unable to run. Today, we checked the following about

Sometimes we have to go to other interfaces to fetch data, possibly because the network reason occasionally failed, in order to be able to automatically retry, wrote such an adorner. This is the version of python2.7x, python3.x can be rewritten with

Object-oriented concepts are classes (class) and instances (Instance), and it is important to keep in mind that classes are abstract templates, such as student classes, and instances are specific "objects" that are created from classes, each with

If you often read the official Python documentation, you can see that many documents have sample code. For example, the RE module takes a lot of sample code: >>> import re>>> m = Re.search (' (? >> m.group (0) ' Def ' These sample code can be

To be precise, Python does not have a data type that specifically handles bytes. However, because Str is both a string and a byte, the byte array is =str. In the C language, we can easily use structs, unions to handle bytes, and the conversion of

Python converts a string to an array of methods. Share to everyone for your reference. The implementation method is as follows: #-----------------------------------------# name:string_to_array.py# author:kevin harris# last Modified: 02/13/

Python's built-in module Itertools provides useful functions for manipulating iterative objects. First, let's look at a few "infinite" iterators provided by Itertools: >>> import itertools>>> natuals = Itertools.count (1) >>> for n in natuals: ...

The examples in this article describe the use of iterators (iterator) in Python. Share to everyone for your reference. Specific as follows: #---------------------------------------# name:iterators.py# author:kevin harris# last modified:03/1

This article describes a python implementation of a remote file reading method with error handling capabilities. Share to everyone for your reference. Specific as follows: Import socket, sys, timehost = Sys.argv[1]textport = "up" filename =

With the web framework and ORM Framework, we can start assembling apps. Typically, a web app needs to read a configuration file at run time, such as a database username, password, etc., while running in a different environment, the web app can read

User management is a problem that most Web sites need to solve. User management involves user registration and login. User registration is relatively simple, we can first through the API to the user registration this function to achieve: _RE_MD5 =

The MVVM pattern can be used not only for form forms, but also for complex management pages. For example, paging shows the function of the blog, we first write the back-end code: In apis.py, you define a page class to store paging

1. Set Headers Some sites do not agree to the program directly in the way of access, if the identification of the problem, then the site will not respond, so in order to fully simulate the work of the browser, we need to set some headers properties.

Hello, everybody. In the last section we studied the problem of the abnormal handling of reptiles, so let's take a look at the use of cookies. Why use cookies? Cookies, which are data stored on the user's local terminal (usually encrypted) by

This example describes the Python ordering method. Share to everyone for your reference. Specific as follows: >>> def my_key1 (x): ... return x% 10...>>> alist = [4, 5, 8, 1, 8]>>> alist[4, 5, 8, 1,, 8]>>> Alist.sort () # Silent Ascending sort >>

The examples in this article describe how Python implements TCP server-side vs. client. Share to everyone for your reference. Specific as follows: TCP Server Program (tstserv.py): From socket import *from time Import ctimehost = "Port = 21567BUFSIZ

Recently learning flask, this article describes how to deploy flask development applications, but also learn the use of Nginx, which is just an experiment on the Mac. Application The application used here is the flaskr given in the official

Recently tried to move the project into a Python environment, especially installed a clean Debian system, ready to reconfigure the environment, the Internet to find some of the environment to run the Python Web solution, finalize the NGINX+UWSGI