Python

1.3.5 Ordereddict ordered DictionaryOrdereddict is a subclass of Dict, which remembers the order in which content is added.Import Collectionsprint ' Regular dictionary: 'D = {}D[' a '] = ' a 'D[' b '] = ' B 'D[' c '] = ' C 'For K, V in D.items

An example of dealing with a list#!/usr/bin/env python#Coding:utf8name= ['!','#','*','Eric','Alex','Jack','Jack','a','b','C','D', 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6,2332,4,2,6,2]first_pos=0 forIinchRange (Name.count (2)): #

Reference: http://www.cnblogs.com/alex3714/articles/5143440.htmliterators: iterators are a way to access the elements of a collection. The iterator object is accessed from the first element of the collection until all of the elements have been

#coding: Utf-8Name = ' Zed A. Shaw 'Age = 8.123 # a LieHeight = # inchesWeight = # # lbsEyes = ' Blue 'Teeth = ' white 'Hair = ' Brown 'Print "His name is%s"%name#这里可以将常量也以这种方式打印出来#格式化字符数字宽度为10, not enough to replace with 0 in front, with an

File operation:Os.mknod ("test.txt") Create an empty filefp = open ("Test.txt", W) opens a file directly and creates a file if the file does not existAbout open mode:W opens in write mode, a opens in append (starting with EOF, creates a new

Sample code:Create a new test.py file with the following contents:[Python]View PlainCopy Print "Show Me" Create a new setup.py compilation file with the following content:[Python]View PlainCopy From Distutils.core Import Setup

15.1 Introduction and motivationWorking with text and data is a big deal. Regular Expressions (RE) are advanced text-matching patterns that provide the basis for features such as search-and-replace. Re is a string of characters and special symbols

1. "" "can insert multiple lines of text.Print """ AbC 123 ' 456 ' " #单引号, double quotes, no relationship " "" 2. Using Chinese UTF-8 encoding# Coding=utf-8 # working with Chinese " English ". Decode ('utf-8'= u" Chinese " ) Print len (x)

Two days ago to interview web Developer, the interviewer raised a question, using JavaScript or Python to implement string inversion, I chose Python, and then wrote the Code (wrong):1 #!/usr/bin/env python2 #-*-coding:utf-8-*-3 __author__='Zhanghe'4

#!/usr/bin/env python#-*-coding:utf-8-*-#Python Nginx cut log 1Import subprocessdef mkdir ():Subprocess.call (' mkdir-pv/usr/local/nginx/logs/$ (date-d "Yesterday" + "%Y")/$ (date-d "Yesterday" + "%m")/', shell= True)def MV ():Subprocess.call ('

Both Easy_install and Pip are used to download the relevant resource bundle for installing Python in a common repository pypi.Install Easy_install First: Https://pypi.python.org/pypi/ez_setupwget https://pypi.python.org/packages/source/e/ez_setup/ez_

1. Tuples>>> A = (1,2,3,4,5)>>> B = List (a)#Convert to a list object, you can change>>>b[1, 2, 3, 4, 5]>>> B[0] ="HAHA" #updates the values in the list.>>>b['HAHA', 2, 3, 4, 5]>>> C = Tuple (b)#tuple, convert list to Narimoto group>>>C ('HAHA', 2, 3

Knowledge points in this section:Multi-layered frame or window positioning: Switch_to_frame () Switch_to_window () Smart wait: Implicitly_wait () For a modern web application, there are often frames or window

Python (Boa python) is an interpretive, object-oriented, high-level programming language with dynamic semantics.In 1989, a Python language was designed to pass time by a Guido van Rossum (Van Rossum), and the first release was published in

Python has a few functions that is useful forThis sort of "functional programming": Map, filter, andReduce.4 (in Python 3.0, these is moved to the Functools module.) The map andFilter functions is notreally all that usefulinchCurrent versions of

A regular expression is a powerful tool for working with strings, finding matching strings with certain syntax rules and returning the string values that you want to get. that is, to have a string match a pattern and get a new sequence .to use the

one or three-dollar operation The if,,else of our study in the last chapter, there is an easy way His expression is this: variable = value 1 if condition else value 2 650) this.width=650; "title=" image "style="

Partial function, partial derivative PythonFunctoolsThe module provides many useful functions, one of which is the Partial function ). Note that the partial function here is different from the partial function in the mathematical sense. When

Python garbage collection mechanism and python garbage collection Reference countThe default garbage collection mechanism of Python is "reference count". Each object maintains an ob_ref field. Its advantage is that the mechanism is simple. When a

Python obtains the zabbix Monitoring Chart The leaders have a requirement to send an email to the server monitoring status on the same day. At the beginning, zabbix is opened every afternoon, which is so tiring every day, therefore, I wrote a script