Python

Binary installation file Download address: https://www.lfd.uci.edu/~gohlke/pythonlibs/ Problem: Pip installation error, XXXX is not a supported wheel on this platform Possible cause 1: installed not corresponding to the Python version of the library,

#-*-Coding:utf-8-*-ImportMatplotlib asOp.ImportNumPy asNpImportMatplotlib.pyplot asPLT #BP神经网络实现异或问题 X=Np.array ([[1,0,0],[1,0,1],[1,1,0],[1,1,1]]#输入层3个节点, the hidden layer is 4 nodes, so we need to 3*4 the right value V=Np.random.random

#-*-Coding:utf-8-*-from BS4 import beautifulsoup import re import urllib import urllib2 import math import codecs do main= ' http://bj.lianjia.com/' url = domain + '/ershoufang/' def get_all_xiaoqu_info (): Html_doc = Urllib.urlopen (URL) . read ()

Address copy, data copy #-*-Coding;utf-8-*- Copy the data from one list to another list #list copy "". The core is a shallow copy or a deep copy (address or data) "" " sourcelist = [11,333,444,555,6,7,6] print sourcelist copy2 =

Title: Enter a certain day of the year, judging the day is the first of the year? Analysis: Taking March 5 as an example, the first two months should be added together, and then add 5 days, that is, the first day of the year, specialcase, Leap year

First, the introduction of the meta-groupPython's tuples and lists are similar, except that the elements of a tuple cannot be modified, tuples use parentheses, and the list uses square brackets.Access tuples: tuples subscriptThe tuple's built-in

Function:Primary knowledge function--http://www.cnblogs.com/eva-j/articles/7125925.htmlFunction Advanced--http://www.cnblogs.com/eva-j/articles/7156261.htmlAdorner function--http://www.cnblogs.com/eva-j/articles/7194277.htmlIterators and Generators--

Previous words:1. The Web page references the table in the bootstrap, so you need to introduce a style class2. The first time to write articles, do not like to spray. There is insufficient place, can leave a message I correct, in this first

1.if __name__ = = = ' main ' functionThe code under this function can run only when the file is running. If the current file is imported as a module by another file, the code under the function will not be executed. The 2.__init__ method uses the

I. Interacting with usersInputPython2: What type of data is entered by the user and stored for what type of data. For example, the input number is stored as an integer, and the input symbol is stored as a string type. Raw_input converts all input

The following error occurred while running the Python program:Import requests Modulenotfounderror:no module named ' requests 'Cause: The requests library was not importedWorkaround:Start Menu Select Run, enter cmd to run, and then the CD command

First, Module introductionModule: A module is a collection of functionsThere are three sources of modules: 1. Built-in Modules2. Third-party modules3. Custom ModulesFormat of the module: 1. py files written using Python2. C or C + + extensions that

Python language so fire, there are many students from other languages to switch over (such as C++,java language), more or less writing code will be affected by other languages! And for the beginning to learn the language of the small white students,

#-*-coding:utf-8-*-Importsysreload (SYS) sys.setdefaultencoding ("UTF8")defLoad_data_set (): Data_set= [ ['Beer','Baby Diapers','Shorts'] , ['Baby Diapers','Shorts'] , ['Baby Diapers','Milk'] , ['Beer','Baby

A concise explanation of the use of sys.argv[] in PythonBecause it is reading self-taught python, began soon after the introduction of the module function, and has been on the idle edit after the run, trying to find its use from the results, but the

Module1 What is a moduleA module is a collection of functions.There are three sources of modules1. Built-in Modules2. Third-party modules3. Custom ModulesFormat of the module:1. py files written using Python2 C or C + + extensions that have been

1. Tuples(1, 2, ' A ', ' abc ')Tuples are read-only data types that, once created, cannot be modified and can only be queriedQuery by index, slice query, slice + step query and string query are similar1 ' a ' ' ABC ' )2print(t[0]) 3print(t[0:2]

First, create a collection1. Featuresto store different elementsDisorderedImmutable types (numbers, strings, tuples)2. Create a CollectionS=set (' Hello ')Print (s)S=set ([' Alex ', ' Alex ', ' SB '])Print (s)s={1,2,3,4,5,6}3. Basic usage of sets(1)

Python three ways to run interactive interpreterEnter Python3 into the python interactive interpreter input exit () exit the interactive interpreter at terminal inputCommand-line scriptingCreating a Python script to execute a program through a

1.msgboxImport Easygui as eg# msgbox# generally uses three parameters, msg: Content, Title: Caption, Ok_button: Button content Eg.msgbox (msg= "Shin yuan garments good earpick", title= "Gakki", Ok_ Button= "Come on!")　　2.ccboxImport Easygui as eg#