Python command line Parsing Library argparse, pythonargparse
Python no longer extends the optparse module after 2.7. We recommend that you use the argparse module to parse the command line in the python standard library.1. example
There is an interview question: compile a sc
This article describes how to use Python to read Image EXIF library, such as PythonImagingLibrary and EXIF. for more information, see Python Imaging Library:
The code is as follows:
From PIL import ImageFrom PIL. ExifTags import TAGS
Def get_exif_data (fname ):"Get embedded EXIF data from image file ."""Ret = {}Try:I
Python library module installation in linux environment, linuxpython
Today, we need to deploy a python script on an online server, which uses MySQLdb and various attempts to download source code (various dependent libraries are incompatible with each other ), get/yum (this linux is so pure that neither of them can be used) installation, wget downloading the rpm p
Solve the problem that may occur when installing the Python library with pip, pippython
The author installed Python and Python 3.6 on Windows 7. However, the following error message is displayed when "pip install XXX" is used to install the Python
matches the regular expression (only one). Re.findall (R ' \d+ ', ' my hight 177 cm my weight kg '): matches all valid data in the specified string that match the regular expression and returns as a list. Re.sub (R ' \d+ ', ' + ', ' my high 177 cm '): Replaces the matched data, parameters: corresponding regular expression, data to be replaced, matching data; 方法一:#coding=utf-8import reret = re.sub(r"\d+", ‘998‘, "python = 997")print ret返回结果:998方法二:#
Although Python is in fact not a purely functional programming language, it is itself a multilingual language and gives you enough freedom to use functional programming. Functional style has a variety of theoretical and practical benefits (you can find this list in Python's documentation):
form can be verified
Modular Nature
Combination of
Easy to debug and test
Although this list has been described clearly enough, I still like Mi
Recently encountered in the work of the score processing, find the relevant data discovery can be implemented using the fraction class, so the following article is mainly about the use of the standard library fractions module Let Python support the score type of the relevant data, the text through the sample code introduced in very detailed, You need a friend to refer to below.
Objective
You may not need t
This example describes the library usage that Python uses to obtain EXIF information for a picture. Share to everyone for your reference. The specific analysis is as follows:
Exif-py is a purely Python-implemented Python library for picture metadata, the official download a
This article mainly introduces Python using Pylab Library to achieve the histogram function, combined with instance form analysis of Python data read, traverse and based on the Pylab library to draw histograms of the relevant operation skills, the need for friends can refer to the next
The examples in this article de
Python uses the ntplib library to synchronously calibrate the local time, pythonntplib
Network Time Protocol was proposed by Professor David L. Mills of the University of Drava in 1985 to design a Protocol for enabling different machines to maintain the same Time on the Internet.
NTP estimates the round-trip latency of packets on the network and independently estimates the Computer Clock Deviation, so as
Turtle is the meaning of turtles. It originally belongs to the logo language (not played ).. however, other languages are supported later. one is smallbasic, and the other is Python. I never knew this library was actually built in Python. it is based on the TK library.
It is easy to use.
from turtle import *
You can.
S
URLLIB3 is a powerful, well-organized Python library for HTTP clients, and many Python native systems have started using URLLIB3. URLLIB3 provides a number of important features that are not available in the Python standard library:1. Thread Safety2. Connection Pool3, client
This article describes the library usage that Python uses to get image EXIF information. Share to everyone for your reference. The specific analysis is as follows:
Exif-py is a pure Python implementation of the capture image metadata of the Python library, the official down
Python Tkinter library installation-Debian-Linux Release Technology-Debian information, the following is a detailed description. Tkinter is a Python GUI widget.
In general, Linux does not come with it. You must install it on your own.
1. Confirm that Tkinter is not installed:
Zhancang @ debian :~ $ Python
Introduction to the statistical data of the ImageStat module of Python image processing library PIL
The ImageStat module is used to calculate the statistical data of an entire image or an image area.
1. Functions of the ImageStat Module
1. Stat
Definition 1: ImageStat. Stat (image )? Stat instance
ImageStat. Stat (image, mask )? Stat instance
Meaning 1: Calculate the statistical value of a given image. If t
Image Format Conversion in Python image processing library PIL (1)
In digital image processing, there are specific processing algorithms for different image formats. Therefore, before performing image processing, we need to consider the format of the image we want to design and implement the algorithm. Based on this requirement, this article uses the image processing li
Although Python provides a number of built-in modules for operation date time, but sometimes does not meet our needs, so the following article mainly introduces you about how Python uses arrow library to gracefully handle time data related information, the need for friends can reference, Let's take a look below.
Objective
We should all know that in many cases we
Kkninjae Source: Http://www.cnblogs.com/kkninjae reprint Please indicate the source, thank you.Recently read an image grayscale algorithm article, intends to use Python to implement the algorithm mentioned in the article.So find a bit of Python processing picture multimedia files Library, found that Python's own library
Python comes with a lightweight relational database, SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with Python to build websites or to create tools with data storage requirements. SQLite also has a wide range of applications in other fields, such as HTML5 and mobile. The sqlite3 in the Python standard
Python built-in standard library socketserver module, pythonsocketserver
The socketserver module simplifies the compilation of network server tasks and encapsulates some operations to a large extent. You can think of it as an event-driven design, which is quite good. It defines two basic classes: server class BaseServer and request processing class BaseRequestHandler.
BaseServer basic server class encapsula
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