Learning the language of Python first to understand what is compiled and explained, what is the connection, what is the dynamic library and the static library,What is compilation:Compilation is the first high-level language design program translated into binary machine language, and then the CPU directly executes the machine code on it. a translation to be execut
Reprint Address:Http://www.codeweblog.com/python%e6%a0%87%e5%87%86%e5%ba%93%e4%b8%8e%e7%ac%ac%e4%b8%89%e6%96%b9%e5%ba%93%e8%af %a6%e8%a7%a3/This article mainly describes the Python standard library and third-party libraries, the need for friends can refer to the followingThis article lists and illustrates the Python st
is a machine learning toolkit that focuses on support vector machines (supported vectors machines, SVM), written in C + +. It is in active development and maintenance, provides the Python interface, and is the best documentation interface. However, compared to Scikit-learn, we found that its API is more difficult to use. Also, there are not many diagnostic and evaluation algorithms available for unpacking. However, speed is a big advantage.
Gensim
Ge
.
Computer Vision
Computer Vision Library
OPENCV,SIMPLECV, etc.
Natural Language Processing
NLP-related python libraries
Nltk,jieba, etc.
Machine Learning
Machine Learning Library
Scikit-learn,tensorflow,theano, etc.
Big Data
Map
My friend asked me how to quickly master python. I want to write a quick Python tutorial similar to the w3cschool style by adding a variety of standard libraries and expanding libraries, on the one hand, keep the words concise, and on the other hand, gradually make it possible for readers without background to start learning from the basics. In addition, I concentrate on a small concept in every article, ho
This article lists and illustrates the Python standard library and third-party libraries as follows, for the needs of friends to reference:
Tkinter ———— Python's default GUI interface.Tkinter is a module with the TK interface, and the Tkinter library provides an interface to the TK API, which belongs to the TCL/TK GUI tool group. TCL/TK is a writing and graphic
This article lists and describes Python's standard library and Third-party libraries as follows for reference to friends who need it:
Tkinter ———— Python's default graphical interface.Tkinter is a module with the TK interface, and the Tkinter library provides an interface to the TK API, which belongs to the TCL/TK GUI tool group. TCL/TK is a writing and graphics device developed by John Ousterhout. Tcl (To
occupy different storage spaces), while Chinese characters convert 1 Unicode characters into 3 UTF-8 characters, and you see \xe4 is one of the bytes, because its value is 228 , no corresponding letter can be displayed, so the numeric value of the byte is displayed in hexadecimal. len () function can return the length of a string: >>> len (U ' abc ') 3>>> len (' abc ') 3>>> len (U ' Chinese ') 2>> > Len (' \xe4\xb8\xad\xe6\x96\x87 ') 6 in turn, the UTF-8 code represents the string ' xxx '
A total of 6 kinds of library recommended, strongly recommend requests library.
One of the Web libraries: Httplib Library
#!/usr/bin/env python
#coding =utf8
import httplib
httpclient = None
try:
httpclient = Httplib. Httpconnection (' www.baidu.com ', timeout=30)
httpclient.request (' Get ', '/')
#res
1. The standard library of Python is the library that comes with the default when the Pyhon is installed.2, Python third-party library, need to download and install to the Python installation directory, different third-party
we're talking about using the commands module to execute Linux shell commands, and when we write operations scripts in Python, we often need to execute the Linux shell commands, and the commands module in Python is dedicated to calling Linux Shell command, and return the status and results, here are the 3 main functions of the commands module:1.commands.getoutput (' Shell command ')2.commands.getstatus (' f
Python third-party library generation 17th-multiprocessing Library
Speaking of concurrency, we think of multithreading and multi-process.
So is multi-process or multi-thread used? This depends on the situation. Our programs are generally divided:
1) network-consuming (most of the time is in network interaction );
2) CPU consumption (Make full use of multiple core
The default terminal launcher Python in Python is in the/usr/bin/directory.
The default system library path in Python is in the/usr/lib/pythonx.x/directory.
The default Third-party library path in Python is in the/usr/local/lib/
Excerpt from: http://blog.chinaunix.net/uid-16360955-id-3351990.html for retained learning1. Common built-in functions: (can be used directly without import)Help (obj) online, obj is any typeCallable (obj) to see if an obj can be called like a functionRepr (obj) obtains a representation string of obj that can be used to reconstruct a copy of the object using the string evalEval_r (str) represents a valid Python expression that returns the expressionDi
10 of python third-party Library Series-commands LibraryWe are talking about using the commands module to execute Linux shell commands. When we use Python to write O M scripts, we often need to execute linux shell commands, the commands module in Python is used to call the Linux shell Command and return the status and
Simple application of Pymongo library
The Pymongo library is a library of Python operations MongoDB. The following is a brief introduction to the simple use of Pymongo. Create MONGO client Select database and set merge insert Data
Import Pymongo
client = Pymongo. Mongoclient (host,port)
#client = Pymongo. Mongoclient
/********************************************************************* * Author:samson * date:02/02/2015 * Test PL Atform: * 3.13.0-24-generic * GNU bash, 4.3.11 (1)-release * *********************************** ********************************/In the HelloWorld project, a simple two-sum program was compiled, and after compiling it into a shared library, how would you use Python to invoke it?use the LL comm
Use of itertools library in Python standard library, pythonitertools
Preface
Because there have not been many things recently, I want to write some technical articles to share with you, and also sort out the knowledge that I have accepted for a while, this is the truth.
Many people are committed to writing Python code
Common Standard Library
Standard library DescriptionBuiltins built-in function default loadOS Operating System interfaceSYS Python's own operating environmentCommon Tools for FunctoolsJSON encodes and decodes JSON objectsLogging Logging, debuggingMultiprocessing Multi-processThreading MultithreadingCopy copyTimeDateTime Date and TimeCalendar calendarsHashlib Encryption algorithmRandom generating random num
'%%xxx%% '" Print sql_str# select * from book where name like '%xxx% 'If this is the case, the printed SQL statement can be run under the SQL command line, but the following error is reported in my Django:' Cursor ' object has no attribute ' _last_executed 'I found on the internet for a long time, all said as long as the "percent" on the line, my is an error. So I boldly added "%%%%", tell the compiler I this is a percent semicolon, incredibly ok!4. Sum up, in Django if Add 2 "%" also reported
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