Python daemon code instance and python daemon
#-*-Coding: UTF-8-*-import sys, OS ''' fork the current process as a daemon. Note: If your daemon is started by inetd, do not do this! Inetd completes all the things that need to be done, including redirecting standard file descriptors. Only chdir () and umask () are required () '''def daemonize (stdin = '/dev/null',
Josh Triplett began his speech at Pycon 2015 with a "laugh point": porting Python without operating system: He and his Intel colleagues let the interpreter run on the Grub boot, BIOS, or EFI system. He has a lot of interesting things to say, and a lot of demos that are open to the eyes of the audience.The original idea of Python running on boot loader was the ability to test hardware, like BIOS, Extensible
Python crawler scrapy framework-manual recognition, logon, inverted text verification code, and digital English Verification Code,
Currently, zhihu uses the verification code of the inverted text in the click graph:
You need to click the inverted text in the figure to log on.
This makes it difficult for crawlers to s
Python randomly generates the instance code of the Chinese verification code. if you need it, refer to the python code.
The code is as follows:
#-*-Coding: UTF-8 -*-
Import Image, ImageDraw, ImageFont
Import random
Import math, s
Before using Bash (http://www.bitsCN.com/article/61943.htm), but that can't be used under Windows, so I wrote a python version, it is also convenient for me to use later ... Here is not more introduced, do not understand the Google under.
Implementation code
The code is as follows:
#!/usr/bin/python
'''File:count.pyAu
1 Introduction
In Python memory management, there is a block concept. It is more similar to the SGI sub-space Configurator.First, apply a large space (4KB) and cut it into a small portion (8, 161 until 512).When there is a request for memory, the simple process is to find the block according to the size, and then give it a copy on the Freeblock.
2 questions
The whole process is a more natural way of slab distribution. But when I read this piece of
The attention method is used. there is an explanation on the internet. Simply put, a string of numbers is randomly generated, and then a subscript is used to determine whether these numbers are repeated. if they are repeated, a screening is performed.
The code is as follows:
Import randomPrint 'n' must> K else error'N = int (raw_input ("n = "))K = int (raw_input ("k = "))Result = []X = range (n)For I in range (k ):T = random. randint (I, n-1)Tem
When dealing with polymorphic objects, you only need to focus on its interface, Python does not need to display the written (like Java) interface, in the use of objects to assume the use of the interface, if not actually included, in the run error.
Copy Code code as follows:
Class handgun ():
def __init__ (self):
Pass
def fire (self):
print ' Handg
It has been implemented in bash before (http://www.jb51.net/article/61943.htm), but that can't be used under Windows, so it's a Python version, and it's convenient for me to use later ... Here is not much introduced, do not understand the Google under.
Implementation code
Copy Code code as follows:
#!/usr/b
Use python to check the online status of mobile QQ. For more information, see
The code is as follows:
Import time, datetimeImport urllib2Def chk_qq (qqnum ):Chkurl = 'http: // wpa.qq.com/pa? P = 1: '+ 'qqnum' +': 1'A = urllib2.urlopen (chkurl)Length = a. headers. get ("content-length ")A. close ()Print datetime. datetime. now ()If length = '20140901 ':Return 'online'Elif length = '000000 ':Return 'offl
No. 0007: There is a directory, which is your own written procedures, statistics on how many lines of code you have written. Include blank lines and comments, but be listed separately.
Train of thought: Get the directory, then traverse the directory of the code files, one by one to count each file code, and then the final summary of output.
0007. Statistics
Complete code Download: Http://xiazai.jb51.net/201407/tools/python-migong.rar
A recent study of the next Maze generation algorithm, and then made a simple online maze game. The game address and the corresponding open source project address can be found through the link above. The open source project does not contain the server-side code, because the server-side
Regardless of the language, we need to pay attention to performance optimization problems, improve execution efficiency. Choosing a scripting language will endure its speed, which in some way illustrates the inadequacy of Python as a scripting language, which is that execution efficiency and performance are not bright enough. Although Python has never been as fast as C and Java, many
network framework and an asynchronous network library.
Pulsar–python Event-driven concurrency framework.
Diesel–python Green-Event-based I/O framework.
gevent– a Greenlet-based Python network library that uses the.
Eventlet– has an asynchronous framework supported by WSGI.
tomorrow– the wonderful modifier syntax for asynchronous
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