Python

Reference:http://python.jobbole.com/81911/Http://www.cnblogs.com/kaituorensheng/p/3826911.htmlOne, iteratorIterators are a way to access the elements of a collection. The iterator object is accessed from the first element of the collection until all

Understand:We first use a popular analogy to understand the next generator, to the restaurant to eat, we ordered the menu, the chef is not a one-time dish are all up, but a dish. The chef here is a generator object. The builder is a Python feature,

Overview:Python's logging module provides a standard log interface through which you can store logs in a variety of formats, logging logs can be divided into,,, and debug() info() warning() error()critical() 5个级别。Logging simple usage of log

1. Boolean expressionsBoth conditional and circular statements use Boolean expressions as criteria Boolean value true or FALSE, denoted by false and true, Front often uses a Boolean expression to compare two values, such as: while 

1. Math Library1>>> fromMathImport*2>>>Pi36.2831853071795864>>>e52.7182818284590456>>> Ceil (2.3)738>>> Floor (2.3)92Ten>>> Pow (2,3) One8.0 A>>>log (E) -1.0 ->>> log10 (100) the2.0 ->>> sqrt (16) -4.01>>> fromMathImport*2>>> exp (2)37.38905609893065

"Main Content" 1. formatting;2. Regular Expressions"Basic Knowledge"First, the format of(i) Conversion of legacy formats using%1. Basic format: string% datastring contains the sequence of values to interpolate, with the inserted portion consisting

Today Friday, oh, the most happy every month is the Friday and pay the day, hehe. I wish you a happy weekend here in advance.Last time I shared how to implement single interface automation with the Python+excel table, today and we say, how to

The special member method of Class 1. __DOC__ represents the description of a classClass Func (object): The __doc__ method is used to print the description of the class "Def Tell" : pass def enroll (self) : Passprint

The following content from: Http://www.cnblogs.com/blueskylcc/p/5332642.html, the other side is also rotating, but did not find the source of the reprint; 1, #!/usr/bin/python is used to illustrate that the scripting language is Python.

Robjbuff = "". Join (Unpack (' =%ds '% Objlen, recv_buf[6+i*objlen:6+ (i+1) *objlen]))Score, Bbox1, Bbox2, Bbox3, Bbox4, p00, P01, P10, P11, P20, P21, P30, P31, p40, p41 = Unpack (' =5f10h ', Robjbuff)Error Example:Robjbuff = Unpack (' =%ds '%

Objective: To read the contents of CSV file, take out 0 and 1 data strings, count the number of consecutive times and frequency of occurrence of 1Read the contents of the CSV file first:Import CSV def csv_read (file): = [] = csv.reader (file)

Recently in the study of Python3, found a problem to summarize, so the following this article mainly introduces you to the Python 3 in the print function to wrap the relevant data, the text through the sample code introduced in very detailed, to the

This article mainly introduces the use of Python to write a snake game instance code, very good, with reference value, need to refer to a friend I added a score display in the program, three kinds of special food, the game logic of the snake is

The dictionary is the only type of mapping in the Python language, which is often encountered in our daily work, the following article mainly introduces you about how to gracefully merge two dictionaries (dict) in Python, the text of the sample code

Serialized json, pickle, and jsonpickle in python What is Json: JSON (JavaScript Object Notation) is a lightweight data exchange format. Easy for reading and writing, and easy for machine parsing and generation. Json uses a completely

Small crawlers need to log on to the wheat College website and log on to the wheat College. Try python to simulate login site: http://www.maiziedu.com/ #! /Usr/bin/env/python # coding: utf-8if _ name _ = '_ main _': from urllib import request,

Summary of using the print function in Python 3, pythonprint Preface Python: "Everything is an object !", Recently, we found that the usage of print in python3 and python2 is many different. In python3, parentheses are used and four spaces are used

Example of a shopping cart program exercise (recommended) and a Python shopping cart at the beginning of python Let's just talk about the code. # Author: Lancy Wuproduct_list = [('iphone ', 5800), ('mac Pro', 9800), ('bike', 800), ('Watch', 10600 ),

Linear regression learning notes and regression learning notes   Operating System: CentOS7.3.1611 _ x64 Python version: 2.7.5 Sklearn version: 0.18.2 Tensorflow version: 1.2.1 Linear regression is a statistical analysis method that uses regression

Python functions (2): advanced functions and advanced python Functions Yesterday we talked about some basic definitions of functions. Today we will continue to study functions. Today we are mainly studying the namespace, scope, nature, and closure