Python

　　Syntax: A dictionary of Key-value data types1info = {2 'stu1101':"Tenglan Wu",3 'stu1102':"Longze Luola",4 'stu1103':"Xiaoze Maliya"5}　　Features of the dictionary:Dict is disordered.Key must be unique　　Find1 Print (info["stu1102"]) 2

I write it yesterday to watch the NE process (RCPFD,CFGD) automatically and then I'll write a window to implement it:#! /usr/bin/env python#-*-Coding:utf-8-*-Import ParamikoImport SSHImport OSImport reImport time#RCPD异常类Class Rcpd_exception

DictionaryKey-value formatThe key defines the rule: 1, immutable types (numbers, strings, tuples). The onlyValue definition rule: any typeCharacteristics:DisorderedKey must be uniqueDefine a dictionaryDIC = {' name ': ' Dong ', ' age ': 18}Print

function is a program logic to the structure or process of a programming method, detailed instructions please refer to the "Python Learning Manual", can not be explained in detail in time, hope forgive me!.First, create a function1.1 DEF

[Package] KeywordsAll keywords encapsulated[Class] _waiting.pyWait for the condition of the function to judge, replace sleep, in order to execute more use cases with conditional logic, can effectively save the execution wait time, quickly locate the

Practice the function of the classmate look over#coding =utf-8#3.1 7 Rows 7 columns Specifies the shape of the patternDefGraph (N): If n==1: Print‘ @\ n‘*7 If n==2: Print‘@@@@@@@‘ Print‘ @‘ Print‘ @‘ Print‘@@@@@@@‘ Print‘@‘ Print‘@‘ Print‘@@@@@@@‘

Import Osimport Os.pathrootdir = "D:\data" # indicates the folder being traversed for Parent,dirnames,filenames in Os.walk (rootdir): #　　　　Three parameters: return 1. Parent Directory 2. All folder names (without

Dictionaries are also referred to as associative arrays or hash lists in other programming languages:The key of a dictionary can be any type, usually a character or stringElement access via key: meta-sequence set, variable type container, variable

Python-Supported systems1. Windows2.Linux3.MacInstall Python under LinuxSee if you have installed Python:rpm-q python//landlord with the CentOS6.5, the system has come with1, install Ipython (under Linux we can enter Python directly into the editing

Level three menu implementation of the basic principle is in the dictionary vaules can also be a dictionary, so can be nested layers to form a multilevel patternWe can look at the code:# level Menu Def menu1 (): Print (' Level menu '. Center (+, '-')

In dictionaries and lists, the pop () function deletes a specific element and returns the deleted element to the specified variable or discardsFirst, the dictionary element is deleted1.1 Clear ()Syntax: Dict.clear ()1 x = {'a'b' 'C': 3 }2x.clear ()3

Cryptographic Module HashlibImportHASHLIBM=hashlib.md5 () m.update (b'Hello')Print(M.hexdigest ())#Hex EncryptionM.update (b' World')Print(M.hexdigest ())#The encryption of this is (b (' HelloWorld '))#5d41402abc4b2a76b9719d911017c592#fc5e038d38a5703

　　Definition List1 names = ["zhangyang"""Guyun "" Xiangpeng""xuliangchen"]　　To take a value from a list by subscript1 Print (Names[0], names[2])　　Slices: Fetching multiple elements1 Print(Names[1:3])#take the second to third value note: Gu Tou

Programming 0 Basics How to learn PythonIf you are 0 basic, note is 0 basic, want to get started programming, I recommend you learn Python. Although the country is basically a C language as an introductory instruction, but at MIT and other foreign

#!/usr/bin/env python#Coding:utf-8#Import pandas as pd, NumPy as np;" "Convert the CSV file to the corresponding adjacency matrix Mat" " fromNumPyImport*;defProtein_complexes_trans (): File= Open ('Protein_complexes.csv'); Filepro= Open ('complexes',

Python crawls hundreds of times the first page of joke, python first page joke Self-taught python web crawler, found that the request is better than urllib, so the request and BeautifulSoup are used to capture hundreds of homepage

Python built-in functions (26) -- globals, pythonglobals English document: globals() Return a dictionary representing the current global symbol table. this is always the dictionary of the current module (inside a function or method,

JSON and pickle for python serialization, jsonpickleJSON Module JSON (JavaScript Object Notation) is a lightweight data exchange format. It is based on a subset of ECMAScript. JSON uses a completely language-independent text format, but it also uses

How to get started with Python without basic knowledgeZero programming basics how to learn Python If you want to get started with programming, I recommend that you learn Python. Although C language is basically used as the entry-level teaching in

Recommendation System-matrix decomposition of hidden factors and hidden factor matrix decomposition When new users come into contact with the recommendation system field, the first thing that is difficult to understand is the collaborative filtering