rfm module

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

OS ModuleA module that the Python interpreter interacts with the operating system. Used to manipulate directories and files.# get current working directory Print (OS.GETCWD ())# Change Directory os.chdir ('C:')print(OS.GETCWD ()) # C +Os.chdir (Os.curdir) # ' . ' Go to the current directory Os.chdir (os.pardir) # ': ' Go to the parent directory os.makedirs ( " a/b/c " ) # Create multilevel directory Os.removedirs ( ' a/b/c ") # Os.mkdir

Tags: style blog http color ar strong SP div ArtInstalling the XLRD module in Python1. Download the compressed package from HTTPS://PYPI.PYTHON.ORG/PYPI/XLRD2. Unzip the downloaded Compression pack3. CD to unzip directory, execute sudo python setup.py installInstall MySQLdb on Ubuntu server:sudo apt-get install Python-mysqldbInstallation was successful, but import mysqldb prompted not to find this modulesudo apt-get source python-mysqldb, want to comp

Thinkphp3.2 defines multiple modules and sets the default module, which is the thinkphp3.2 module. Front-end entry file index. php Admin. php In this way, you can easily remove the module name from the url without configuring any default modules and modules in the configuration file. Haha .. I have already tried it. Unless you only have one

PHP adds the Redis module and connection, and phpredis module. PHP adds and connects to the Redis module. several articles on the phpredis module introduce the installation and use of Redis. The following describes how to add Redis extension in php! The php Manual does not provide the Redis class and the PHP to add and

Python 17th days --- time module, random module, python 17th days Complete a assignment and start new learning: I learned the following two modules from today's limited time. I will continue tomorrow! Time module and random Module Import time 1 #! Usr/bin/env python 2 #-*-coding: UTF-8-*-3 # Author calmyan 4 import t

Day6 SYS module and day6sys Module SYS module Provides operations related to the Python Interpreter: (1)Sys. argv command line parametersListThe first element is the program path. >>> Sys. argv[''] (2)Sys. exit (n) exit the program. exit (0) (3)Sys. version: get the version information of the Python interpreter. (4)The largest value of sys. maxintIntValue (5)Sys.

Python random module, pythonrandom Module Copy codeThe Code is as follows:Import randomPrint random. random () Obtains a floating point number smaller than 1. Copy codeThe Code is as follows:Import randomRandom. randint (1, 10) Returns an integer from 1 to 10. Copy codeThe Code is as follows:Import randomPrint random. uniform (0, 2) Obtains a floating point number greater than 0 and less than 2. Copy codeTh

1.1Mounting Module1.1.1installing third-party modulesThe third-party library will be Python official pypi.python.org website registration, to install a third-party library, you must first know the name of the library, you can search on the official website or PyPI , such as Pillow name called PillowPip Install Pillow1.1.2Module Search Pathwhen we try to load a module, Python searches for the corresponding. py file under the specified path , and if it

one, sys moduleSYS module is a module that interacts with the Python interpreter and is commonly used in the following waysSYS.ARGV: Used to receive parameters from outside the program while the program is running, if the parameter is not passed, the program's file name is displayed.Import sysname=sys.argv[1]password=sys.argv[2]if name== ' jly ' and password== ' 123 ': print (' program continues ') Else:

Bluetooth module HC-06Knowledge Point one: Bluetooth statusLED indicates Bluetooth connection status, flashing indicates no bluetooth connection, normally lit table Bluetooth is connected and open serial port (ports)Knowledge Point two: Related parametersInput voltage 3.6v-6v, current 30mA when not paired, 10mA after successful pairing.When the Bluetooth connection is not established, it is supported by setting the AT command (baud rate) to modify the

time combinations:Print Time.strftime ("%y-%m-%d%x") #2016-10-26 20:50:133. Time plus minus#timestamp加减单位以秒为单位import Timet1 = Time.time () t2=t1+10print time.ctime (t1) #Wed Oct 21:15:30 2016print time.ctime (T2) #Wed Oct 26 21:15:40 2016Second, the DateTime moduleThe Datatime module encapsulates the time module, providing more interfaces and providing classes that are: Date,time,datetime,timedelta,tzinfo.

Http://blog.csdn.net/pipisorryPython's pickle module implements basic data sequence and deserialization. Through the serialization of the Pickle module we are able to save the object information running in the program to a file, to store it permanently, and through the Pickle module's deserialization, we are able to create from the file the last object saved by the program.Basic interface:Pickle.dump (obj,