uplink module

This article mainly introduces the Python module search concept Introduction and the module installment method Introduction, this article explained in detail the Import module operation principle, the search path process as well as the module installment various methods, needs the friend to be possible to refer to unde

PiL profile what is PILPIL: is the abbreviation of the Python Image Library, the module of the graphics processing. The main classes include Image,imagefont,imagedraw,imagefilterImport of PiLFirst you need to install the pillow packagePip Install PillowThen we can call the class in PiL.From PIL import imagefrom PIL import imagefontfrom PIL import imagedrawfrom PIL import ImageFilterPiL Common methodsOpen () #打开图片new (mode,size,color) #创建一张空白图片save

This is relatively simple, there is nothing to emphasize, if the JSON is returned directly according to the key value, if the page is to use the HTML lxml module XPath parsing.From lxml import htmlimport jsonclass getnodelist (): def __init__ (self): self.getdivxpath= "//div[@class = ' Demo '] " def use_xpath (self,source): If Len (source): root=html.fromstring (source) #html转换成dom对象 Nodelist=root.xpath (Self.

Configparser module:is the module used by the Python standard library to parse the configuration file.Format:Section: Using [] to mark section names: or =: using: or = Assignment[Websv]ip: ' 192.168.1.10 ' port:443name = ' root ' pw = ' root1990 ' definition: WEBSV called sectionThe same item can have multiple values:IP: ' 192.168.1.11 ', ' 192.168.1.12 ', ' 192.168.1.13 ' #待测试When the read configuration file is changed, the parameter name is automati

1 sys.argv command line argument list, the first element is the program itself path 2 sys.exit (n) exit the program, exit gracefully (0) 3 sys.version get version information for Python interpreter 4 Sys.maxint the maximum int value of 5 Sys.path returns the search path of the module, using the value of the PYTHONPATH environment variable when initializing 6 Sys.platform returns the operating system plat

1 #Cryptographic Modules2 ImportHashlib3 4 #MD5 encryption MD55 #1. Initialize the MD5 module to generate the MD5 object6 #2. Introduce the data update to be encrypted7 #3. Get the encrypted value Hexdigest8m =hashlib.md5 ()9M.update ('Hello World'. Encode ('UTF8'))#The default character encoding in Python3 is UnicodeTen Print(M.hexdigest ())#5EB63BBBE01EEED093CB22BB8F5ACDC3 One A #SHA Encryption sha256 The most call mode - #1. Initializing the Sha25

There are four main classes of logging module logging: Logger,handler,formatter,filterLogger provides an interface that the application can use directly, and each program obtains a logger before outputting the informationHandler sends the log record (created by logger) to the appropriate destination output, handler can output the information to the console, or output the information to a file, and send the information to the networkFormatter determini

Shelve module is also used to serialize, can persist any pickle can support the Python data format, better than Pickle, but also python-specific, can dump multiple data, can also directly modify the dataSerialization of#-*-Coding:utf-8-*-__author__ = "MuT6 sch01ar" Import shelvef = Shelve.open (' shelve_test ') names = ["John", "Jack", "Jane "]info = {' name ': ' John ', ' age ': 22}f[' name '] = namesf[' infos '] = Infof.close ()Three files generated

4 APR 18Last lesson review: functions are used within a program and modules can be shared by several programsFirst, the Software development directoryconfàsettings.pyCore (primary logic) àsrc.pyDbàdb.txtLib (library) àcommon.pyBin (inlet, start) àstart.pyLogàaccess.logReadme (instruction manual)Second, the use of logging moduleThe log is divided into five levels: Debug, info, warning, error critical 50Log can be printed if the log level is set to 10, including more than 10The logging

Configparser module: for creating profiles in a certain formatCreateImportConfigparserconfig=Configparser. Configparser () config['DEFAULT'] = {'default':'Yes'}config['Path'] = {'UserInfo': R'E:\pycharm\ Learning \day29\userinfo'}with Open ('Userinfo.ini','W', encoding='Utf-8') as F:config.write (f)After the file is completed:== E:\pycharm\ Learning \day29\userinfoViewPrint(Config.sections ())#[] Because the file has not yet been readConfig.read ('Use