python plotting libraries

://blog.csdn.net /lanphaday/archive/2007/10/28/1852726.aspx) and "Computational Image similarity" (http://blog.csdn.net/lanphaday/archive/2008/04/24/ 2325027.aspx). MySQLdbThis is Python's support for open source database Mysql, the official website in Http://sourceforge.net/projects/mysql-python. Support for the full range of Mysql 3.23-5.1 version, the Python version of the requirements are 2.3-2.5. MYSQL

ObjectiveThe so-called Web crawl, is the URL address specified in the network resources from the network stream read out, save to Local. There are many libraries in python that can be used to crawl Web pages, so let's learn urllib first.Note: This blog development environment is Python3UrlopenLet's start with a piece of code:# urllib_urlopen.py# 导入urllib.requestimport urllib.request# 向指定的url发送请求，并返回服务器响应的类文

Dir function to view the properties of an objectThe use of the method is simple, for example, the OS type, in the Python command Window input dir (' OS ') to view the properties of the OS moduleOpen cmd Command WindowEnter Python (note: The computer needs a Python environment and the Python environment variable is conf

python programming: Creating high-quality programs using design patterns, concurrency, and librariesDirectory 1 Create design mode 2 structural design mode 3 behavioral design mode 4 advanced concurrency 5 expanded python 6 Advanced network programming 7 tkinter 8 opengl Create Design Patterns Abstract Factory @class

/537.36"= urllib2. Request (URL, headers == urllib2.urlopen (request)print response.read ()The following error message appears when you run the program:Urllib2. Urlerror: Therefore, if you encounter such a site in the future, we need to handle the SSL certificate separately, let the program ignore the SSL certificate validation error, can be accessed normally.ImportUrllibImportUrllib2#Import Python SSL processing moduleImportSSL#Ignore unverified SSL

(width)] ' for ' in range (1, width-1): rows[0][x] = HO Rizontal Rows[height-1][x] = Horizontal for y in range (1, height-1): rows[y][0] = VERTICAL row S[Y][WIDTH-1] = VERTICAL for y, X in ((0, 0), (0, Width-1), (height-1, 0), (height-1, width-1)): ROWS[Y][X] = CORNER return rowsclass rectangle:def __init__ (self, x, y, width, height, fill, stroke): s elf.x = x self.y = y Self.rows = _create_rectangle (width, height, BLANK if fill = = "White" El Se "%") class Text:def __init__ (self, x,

Installing third-party libraries with Easy_install and Pip is convenientThey are actually downloaded from the official Python source Pypi.python.org/pypi to the local, then unpacked and installed.But for some reason, access to the official PyPI is unstable, slow or even inaccessible.As with Ubuntu's apt and CentOS's yum, there are various image sources like PyPI.The source of the highly recommended watercre

Fuzz.ratio ("Hit me with your best shot", "Hit me with your pet shark") # 85 8) ProgressBar As its name, a scroll bar function library Copy Code code as follows: From ProgressBar import ProgressBar Import time Pbar = ProgressBar (maxval=10) For I in range (1, 11): Pbar.update (i) Time.sleep (1) Pbar.finish () # 60% |######################################################## | 9) Colorama A color library that can add rich colors to the text

Pillow Image Processing Library Requests accessing network resources Chardet for code detection Import Chardet Print (Chardet.detect (b'hello,world')) #{' encoding ': ' ASCII ', ' confidence ': 1.0, ' Language ': '} import chardetdata =" ". Encode ( ' GBK " ) print (Chardet.detect (data)) # {' encoding ': ' GB2312 ', ' confidence ': 0.7407407407407407, ' Language ': ' Chinese '} Import chardetdata=' newest main ニュース '. Encode ('euc-jp') print#{' encoding ': ' euc-jp '

Graviti ‘‘‘ 4.wget, more useful library, can be used to download pictures Import wget Url = "https://timgsa.baidu.com/timg?imagequality=80size=b9999_10000sec=1532975831713di=6add9fa41ac1a7ddbddcaa919d49c497imgtype=0src=http%3A%2F%2Fimage.uczzd.cn%2F6715434799472055716.jpeg%3Fid%3D0" # Parameter one: url, downloaded address, parameter two: out, output file name or path Wget.download(url=url, out=r"C:\Users\Administrator\Desktop\aaa\matsuri.jpg" Of course, enter

1.bisect: Use the dichotomy to find the appropriate insertion position in a sorted sequence.>>>import bisect>>>l = [10,19,88,90]>>>bisect.bisect (l, a) >>>2 # The position suitable for insertion is 2bisect.bisect_left (l, #如果已经在列表中存在) and returns to the left position Bisect.insort_left (l,22) #插入2.HEAPQ: Fully balanced binary tree, all nodes are smaller than their child nodes.From HEAPQ import *from random Import *l = sample (Xrange (+), ten) heap = []print lfor i in L:heappush (heap, i) Pri

1, Os.pathOs.path.split (): OS split path, returns a tuple, the first is a path, the second is a file name;Os.path.basename (): Get file name only;Os.path.dirname (): Get path only;Os.path.splitext (): Separates the path, file name, extension, and returns a tuple;Os.path.commonprefix: In a set of paths, look for a common prefix;Os.path.jion (): combine some scattered strings to generate a secure path;Os.path.expanduser (): Look for the eternal home directory;Os.path.expandvars (): The value of t

execute the SQL command when executing the query, pay attention to the security of the SQL statement, C=conn.cursor ()# never do this--insecure!Symbol = ' Rhat 'C.execute ("SELECT * from stocks WHERE symbol = '%s '"% symbol)?# do this instead, note that there is only one element in a tuple followed by a comma#sql语句中的替换符为?t = (' Rhat ',)C.execute (' SELECT * from stocks WHERE symbol=? ', T)Print (C.fetchone ())?# Larger example that inserts many records at a