Python

Environment: Centos6.5,python 2.6Source Document Use Utf-8# !/usr/bin/python # -*-coding:utf-8-*-The string is utf-8 by default (no need to add u in front)Import sysreload (SYS) sys.setdefaultencoding ('UTF8')Python internal language environment

def consummer (name):While True:Baozi = yieldPrint (' Bun%s ' came, was eaten by%s '% (baozi,name))Return Nonec = Consummer (' Purple star adult ')BZ = ' leek stuffing 'C.send (BZ) #唤醒yield并传值c.__next__ () #只唤醒不传值Simulate parallel effects under

ImportUrllib2ImportReImportMySQLdbclasslatesttest:#Initialize def __init__(self): Self.url="https://toutiao.io/latest"Self . UserAgent='mozilla/5.0 (Windows NT 6.1; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/48.0.2564.97

The ZIP function accepts any number of sequences (including 0 and 1) as parameters, returning a tuple list.The zip function is useful for generating a dictionary (dict) after getting the data.For examples:1 #Code based on Python 3.x2 #_*_ coding:utf-

Goal:1. Write menu, Prompt user action option (push,pop,view,quit)2. Rules: Define the list, first into the stack, after the stack, then into the stack, first out of the stack1. Simulation into the stack, the stack operation>>> List1 = []>>>

classfile (object)defClose (self):#real signature unknown; restored from __doc__Close File"""Close (), None or (perhaps) an integer. Close the file. Sets data attribute. Closed to True. A closed file cannot is used for further I/O

#!/usr/bin/env python# -*- coding:utf-8 -*-import sys, os "to fork the current process into a daemon     Note: If your daemon is started by inetd, do not do so! Inetd finished     all the things that needed to be done, including redirecting standard

map () is a Python built-in high-order function that receives a function f and a list, and then, by putting the function f on each element of the list in turn, gets a new list and returns.For example, for list [1, 2, 3, 4, 5, 6, 7, 8, 9]If you want

Security Code: Indifferent ChildeFirst, Python introduction Python is an object-oriented, interpreted computer programming language, invented by Dutchman Guido van Rossum in 1989, and the first public release was released in 1991.Python syntax is

1. OS Path module 1. Os.path.abspath (path): The absolute path of the return address depending on the operating system.2. Os.path.basename (PATH): Returns the last name of the given path (either a file name or a folder name), the second value

Scenario Description:The JSON module in the Python standard library integrates the ability to serialize data, and when serializing data using the Json.dumps () method, if there is a datetime data type in the target data, Will throw an

Through the script case, the application of several concepts of class in Python in the script is analyzed.The script is as follows:++++++++++++++++++++++++++++++++++++++++#!/usr/bin/env python#-*-Coding:utf8-*-class MyClass (object): #定义类message =

Python bytes converted to a string will encounter the following error:Codec can ' t decode byte 0xff in position 5:illegal multibyte sequenceIn fact, the problem of encoding format, by using: Ok_cookies = Ok_str.decode (' iso-8859-1 ')Ok_str = B '

Recently these days, learning a bit of Python, for the crawler is more interested in doing a simple crawler project, using Python library Tkinsert made an interface, feel that the library is still very convenient to use, the program used in the

PSYCOPG2 Click to view documentsBefore using ORM, we have been using PSYCOPG2 to operate the database. The reason is that you prefer to write native SQL statements, although the development speed is slower than using ORM, but self-feeling reliable,

1. Decorator:#!/usr/bin/env Python3User_status = False #用户登录了就把这个改成Truedef login (auth_type): #把要执行的模块从这里传进来def auth (func):def inner (*args,**kwargs): #再定义一层函数if Auth_type = = "QQ":_username = "Tom" #假装这是DB里存的用户信息_password = "abc123"

Def func1 (): print ' Hello world ' res = func1 () print type (res) def FUNC2 (): return [' xyz ', 10000,-98]atuple = Func2 () x, y , z = FUNC2 () print X,y,zdef func3 (): Return ' xyz ', 1000,-98x,y,z = func3 () print X,y,zdef Func4 (): return ['

1. character encoding#ASCII码里只能存英文和特殊字符 cannot be saved in English 1 bytes 8 bits#中文编码为GBK operating system encoding is also GBK#为了统一存储中文和英文和其他语言文字出现了万国码Unicode all one character takes 2 bytes 16 bits#英文文档改为Unicode编码大小变大一倍 to solve this wasted space

Pandas basics-Python3, pandas-python3   Unfinished  For examples:  Example 1: 1 # Code based on Python 3.x 2 # _ * _ coding: UTF-8 _ * _ 3 # _ Author: "LEMON" 4 5 import pandas as pd 6 7 d = pd. date_range ('20140901', periods = 7) 8 aList = list

Replace the file name and content in the python folder, Example: 1. Replace the name of the folder and subfolders in a folder from OldStrDir to NewStrDir; 2. Replace the names of folders in a folder and all files in subfolders with OldStrFile to