Catalog specification(1) The canonical wording of the document:1. bin executable file2.conf configuration file3.core Primary business logic4.db Data files5.lib Library6.log log files7.README description File (one document)In the above folder you do not need to be the package of your package usually put into Lib but notice that Lib should not be a package, doubt?# Whether this folder should be a package or a folder, in fact, the problem is to need not to the Init# The function of Init is to impor
Asynchronous modules define AMD and asynchronous modules amd
It is called Asynchronous Module Definition, and is defined by Asynchronous components (or modules. AMD is a mechanism in which components and their dependencies can be asynchronously loaded.Define Method
define(id?, dependencies?, factory);
Component ID
The component ID is the unique identifier of a c
JSON and pickle modules, two modules for serializationJSON module for conversion between a string and a Python data typePickle Module for conversion between Python-specific types and Python data typesTwo modules, all available with dumps,dump,loads,load 4 functions1 ImportJSON2s ='{"Key1": "Value1", "Key2": "Value2"}' #==> use JSON
Common gnuradio modules and gnuradio modules
--- Restore content start ---
Reference: http://gnuradio.org/redmine/projects/gnuradio/wiki/TutorialsWritePythonApplications
Statement of the import module
from gnuradio import MODULENAME
Common modules include the following
The main gr gnuradio library, basically used by every program
Functions related to analog signa
modulesIn Python, the installation of a third-party module is done through the Package management tool PIP.If you are using Mac or Linux, install the PIP itself this step can be skipped.Commands for installing Pillow: PIP3 Install PillowIf you do not want to use PIP one installation time and effort, but also need to consider compatibility. Can be directly used anaconda, which is a python-based data processing and scientific computing platform, it has built up a number of very useful third-party
Requirejs is a simple JavaScript framework that supports modular coding and asynchronous loading of modules.In the Requirejs module can be divided into: Anonymous module and named module of these 2 kinds.Requirejs Defining an anonymous moduleDefine (function () { Requirejs defining a named ModuleDefine ("Constantmodule", [],function () { Requirejs Official Online also said: It is normally best to avoid coding in a name for the module and just let the optimization tool burn I n the module names
Use C ++ to write extension modules for node. js and node. js extension modules
Prerequisites: Install node. js, Python2.7, and visual studio 2013.
Process:Install the GYP project generation tool npm install-g node-gyp.Create the test directory, which is our working directory. Create another src directory to store the C ++ source code and create a new one named binding. gyp text file, which is a gyp project
App8 for group purchases using imitation handles-More modules and app8 for group purchases using handles-Modules
1. Obtain the cache size and clear the cache
All data paths in the application:
/Data/com. xxx. xxx/cache-in-app cache (Note: Corresponding Method getCacheDir ())
/Data/com. xxx. xxx/databases-in-app Database
/Data/com. xxx. xxx/shared_prefs-application configuration file
/Data/com. xxx. xxx/fil
Nodejs self-study. jsfunction Hello () {Console.log ("Hello World");}function S () {Console.log ("This is a EW");}function Add (A, b) {return a+b;}Exports.hello = hello;//Left out interfaceEXPORTS.S = s;Exports.add = add;Test.jsLoading modulesvar app = require ("./nodejs self-study");//./indicates the current directory, you can also fill in the "./nodejs self-study. js"App.hello ();App.s ();Console.log (App.add (1,3));Node Test.js in the terminalResults:Hello WorldThis is a EW4Examples of Nodejs
Module FS:He can manage the file system, write files, delete and so on.Module Rimraf:Recursive deletion of the file's node plugin, before the project's file compilation, you can clear the contents of the Dist folderAPI Example:varFS = require ("FS");varRimraf = require (' Rimraf '));vartxt = "I am new content Bb.txt"; Fs.readfile ("./bb.txt", "UTF8",function(error,data) {if(Error) {Throwerror; } console.log (data);}); //Read FileFs.writefile ("./bb.txt", TXT,function(err) {if(err) {Throwerr};
urllib.requestimport jsonimport jsonpath# Pull Hook net city json file URL = ' Http://www.lagou.com/lbs/getAllCitySearchLabels.json ' # user-agent header = {' user-agent ': ' Mozilla /5.0 (Windows NT 6.1; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/39.0.2171.71 safari/537.36 '}# URL, together with headers, constructs the requests request, which will be shipped with Chrome browser user-agentrequest = urllib.request.Request (url, headers = header) # Send this request to the server respon
. Popen (' ls-l ', shell=true) 3 #subprocess. Popen ([' ls ', '-l '])Controlling child processes1 s.poll () # Checking child process Status 2 S.kill () # terminating child process 3 s.send_signal () # Sending signal to child process 4 s.terminate () # terminating child process 5 S.pid: Child process numberSub-process output flow controlYou can change standard input, standard output, and standard errors when Popen () is established, and can take advantage of subprocess. Pipes connect the inputs a
(Re.search (' \dcom ', ' www.4comrunoob.5com '). Group ()) The execution results are as follows: 4com (3). Re. FindAll ()Re.findall traversal matches, you can get all the matching strings in the string and return a list.Format:Re.findall (Pattern, string, flags=0)p = re.compile (R ' \d+ ')Print (P.findall (' O1n2m3k4 ')) The execution results are as follows: [' 1 ', ' 2 ', ' 3 ', ' 4 '] (4). Some points of attention: (1) The difference between Re.match and Re.search and Re.findall:Re
j in IP: # # #循环列表Myping (j)#################################################Multi-process [each process, has its own memory]Multithreading [Share a piece of memory]Multi-threaded ping host faster than above#!/usr/bin/python#coding: Utf-8Import threadingImport subprocessdef myping (x):M=subprocess.call (' ping-c2%s >/dev/null '%x,shell=true)If m==0:Print '%s is up '%xElsePrint '%s is down '%xip=[' 176.121.205.%s '%i for I in Xrange (1,254)]For-J in IP:A=threading. Thread (Target=myping,args=[j]
Explanation of common modules in python 1. Explanation of python modules
1.Time Module
Import times = time. localtime () # convert the time to the formatted time. get the time in struct_time format, such as year, month, and day. struct_time (maid = 2018, tm_mon = 3, tm_mday = 11, tm_hour = 19, tm_min = 53, tm_sec = 31, tm_wday = 6, tm_yday = 70, tm_isdst = 0) s = time. gmtime () # UTC time zone s = time. ti
Python learning notes (3) import and reload Python modules and modules
A module is a core concept of the Python program architecture. A large program is usually presented in the form of multiple module files. A module is designed as a master file or a top-level file to start the entire Python program. Each Python source code file suffixed with. py is a module. Other files can read the content of this module
Time and datetime modules in Python are modules in the temporal contextOne, Time moduleThere are three types of time-performance formats in the Times module:1, timestamp: Timestamp, time stamp represents the offset in seconds from January 1, 1970 00:00:002, Struct_time: Time tuple, a total of nine element groups.3. Format time: Formatting times, formatted structure makes time more readable. Includes custom
Web Crawl
Web sites use HTML descriptions, which means that each Web page is a structured document. Sometimes it is useful to get data from it while maintaining its structure. Web sites do not always provide their data in an easy-to-handle format, such as CSV or JSON.
This is the time for the web to crawl out. Web crawling is the practice of using a computer program to collect and organize Web page data into the desired format while preserving its structure.
lxml and requestslxml (http://lxml.
Python functions and modules, Python function modulesIntroduction
Function concepts also exist in python. Standard functions can be called built-in functions, which can be called directly by function names. However, some other built-in functions cannot be called directly through the function name, such as the floor function (rounded down). Then we need to use the module; this article mainly introduces math and cmath.
Python version: 3.4.4
Built-in fu
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