python ocr library

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 commands of the Linux shell, and the commands module in Python is dedicated to invoking the Linux shell commands. and return the status and results, here are the 3 main functions of the commands module:1.commands.getoutput (' Shell command ')2.commands.g

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

Example: Draw a Python#Turtle: Drawing Library (Turtle Library)ImportTurtleturtle.setup (650,350,200,200) Turtle.penup () turtle.fd (-250) Turtle.pendown () turtle.pensize (25) Turtle.pencolor ("Purple") Turtle.seth (-40) forIinchRange (4): Turtle.circle (40,80) turtle.circle (-40,80) turtle.circle (40,80/2) TURTLE.FD (40) turtle.circle (16,180) TURTLE.FD (40*2/3

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

Transferred from: http://blog.csdn.net/jurbo/article/details/52334345Write this cause is, or because in the Python challenge, sometimes want to solve problems, even should use which class library do not know, but also to Baidu (I do not believe that I am a person so embarrassed TVT)It seems that since I learned the basics of Python syntax, I've seen some of the c

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

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

Use the PDB library debugging program in Python and the pythonpdb library debugging The pdb library that comes with Python finds that it is very convenient to use pdb to debug the program. Of course, pdb cannot be used for remote debugging or multithreading. There are multip

'%%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

Simulate logon using the Request library in Python (1): The font library (no encryption, no verification code), pythonrequest Such simple (Insecure) login forms are rare. The following figure shows the log-on Form of the font library, saving irrelevant content: 1 Through packet capture analysis, we can find that the u

When it comes to concurrency, we think of multithreading and multi-process.Does it use multiple processes or multithreading? It depends on the situation. Our procedures are generally divided into:1) consume the network (a large part of the time is in the network interaction);2) CPU consumption (full use of multicore)In the first case, most of the time is occupied by the network delay, so the use of multithreading and multi-process are similar.In the second case, the length of time is determined

, Cmap=cm.gist_earth, vert_exag=0.1, blend_mode= ' soft ')Surf = Ax.plot_surface (X, Y, Z, rstride=1, cstride=1, Facecolors=rgb,Linewidth=0, Antialiased=false, Shade=false)Plt.show () #最后渲染出你好看的三维图吧 (2333333333333333333)PS: The python I used is anaconda integrated, avoids installing Matplot (233333333333)Anaconda Install Gdal, installation method gray often simple win+r cmd into the command window and then enter the

What Virtualenv is. Virtualenv is a tool to create isolated Python environments. In order to isolate different versions of the development environment (if the project is collaborative development, the version of the library problem is a headache, with this can be in their own environment to run). Step one, install Virtualenv: (PIP installation refer to Python thi

recent work has not made any progress, I can only say ExtJS a little bit big, hard to chew ~ In Python, it is often possible to move from one object to another to facilitate subsequent computations, which can be implemented using copies. Generally speaking, the copy is divided into three kinds: 1. pointer reference, 2. Shallow copy, 3. Deep copy. One, pointer reference Objects in Python are assigned

) ->>>RA +[0, 2, 3, 9, 7, 8, 5, 6, 1, 4] A>>> Sample (ra,4) at[1, 8, 5, 9]3. Random seeds1>>> Seed (10)2>>>random ()30.57140259468991354>>>random ()50.42888905467511466>>>random ()70.57809130113447048>>> seed (1)9>>>random ()Ten0.13436424411240122 One>>>random () A0.8474337369372327 ->>> Seed (10) ->>>random () the0.5714025946899135 ->>>random () -0.4288890546751146 ->>>random () +0.5780913011344704It can be seen that pseudo-random numbers are generated by random seeds.4. Monte Carlo (Monte Carl

Today I found a very interesting feature, Python comes with a document viewer for all libraries, configured as follows:To configure the Pydoc service, enter the following code in CMD:python –m pydoc –p 1234After the carriage return, the window is not closed during use.Then, enter the URL in the browser: http://localhost:1234/, open the Python's own and integrated third-party library API.The interface looks

We often deal with files and directories, and for these operations Python provides an OS module that contains many functions for manipulating files and directories. To know what the methods are, we can run the following statement to output all of the OS module information on the screen:Import oshelp (OS)If you understand Linux basic operations, some of the following OS methods should be familiar, because the basic and Linux operating methods are the s

The following issues were found in Python today:1. After the from matplotlib import Pyplot as PLT, then import cv2Cv2.imshow () is not working, and I don't know why.My workaround now is to use CV2 to read the image and then call Plt.imshow () to display the image without using cv2.imshow () to display the imageThe color space in the CV2 Library of 2.OpenCV is arranged differently from the color space in the