Python

Two days ago a colleague asked a Python question:Why a python file in a directory references a Python file that does not have another sibling directory, but the parent record of the two directories can be referenced at runtime. At that time, the

String formatting expressionsformatting stringsOn the left side of the% operator, put a string that needs to be formatted, starting with%Put an object on the right side of the% operator, which is the character on the left to format the string

In Python, you define a function to use a def statement, write out the function name, parentheses, the arguments in parentheses, and a colon, and : then, in the indent block, write the function body, and the return value of the function is returned

String modification>>> Wu' Wuang '>>> Wu = wu[:2] + ' Zhang '>>> Wu' Wuzhang '>>> Wu' Wuzhang 'Modify replace directly with replace>>> Wu = wu.replace (' Uzh ', ' u ')>>> Wu' Wuang '>>> ' Zhangsan '. Replace (' A ', ' a ')' Zhangsan 'Replace once>>>

14,python How to create a process and communicate in a parent-child processThe sample code is as follows:[CPP]View Plaincopy Import OS, sys Print "I ' m going to fork now-the Child would write something to a pipe, and the parent would read it

First:DescriptionOne of the data types built into Python is the list: lists. A list is an ordered set of elements that can be added and removed at any time.For example, by listing the names of all the classmates in the class, you can use a list to

Reprint Please specify the source Thank you: http://blog.csdn.net/vmurder/article/details/42964151ExercisesThere is a comment inside the code.Attention:Chinese characters in Python2 even if commented, ce (of course, because Python is run directly,

11, how to compile the compiled Python script for PYC format[CPP]View Plaincopy #!/usr/bin/python Import Py_compile; Import SYS; File=raw_input ("Enter your file name"); Py_compile.compile (file); Sys.exit ();

Recently in the notebook reinstall the virtual machine, because at home in the company often need to switch IP, modify the IP configuration file, feel quite cumbersome, so simply write a script to automatically switch IP, mainly read the

Another ordered list is called a tuple: a tuple. Tuple and list are very similar, but once the tuple is initialized, it cannot be modified, for example, the name of the classmate is also listed:>>> classmates = (‘Michael‘, ‘Bob‘, ‘Tracy‘)Now,

1. What is Beatifulsoup?Beatifulsoup official website Http://www.crummy.com/software/BeautifulSoup/BeatifulSoup is a html/xml parser written in Python, It can handle non-canonical tags well and generate a parse tree. It provides simple and common

Python collectionCollectionThe collection is unorderedCreate a Collection>>> x = set (' Wuang ')>>> xSet ([' A ', ' u ', ' G ', ' w ', ' n ')>>> y = set (' Yang ')>>> ySet ([' Y ', ' a ', ' g ', ' n '])>>> X-ySet ([' U ', ' W '])>>> x | YSet ([' A ',

One: OutputWith Print plus a string, you can output the specified text on the screen. For example, enter ' Liu Yan Liang 'print ' Liuyanliang 'printStatements can also be followed by multiple strings, separated by a comma "," to be connected to a

The maximum product of four adjacent numbers in 1000 numbers is 9x9x8x9 = 5832.731671765313306249192251196744265747423553491949349698352031277450632623957831801698480186947885184385861560789112949495459501737958331952853208805511125406987471585238630

Transferred from: http://www.jbxue.com/article/15324.htmlIn Python programming, the import of modules requires a process called "Path search".Locate the mymodule.py file in the file system "predefined area" (If you import MyModule).These predefined

1 #!/usr/bin/python2 #-*-coding:utf-8-*-3 defSMTP (file):4 fromEmail.mime.textImportMimetext5 fromEmail.mime.multipartImportMimemultipart6 ImportSmtplib7 8 #Msg=mimemultipart ()9 Ten #Construction Annex 1 One #att1 =

Python collectionCollectionThe collection is unorderedCreate a Collection>>> x = set (' Wuang ')>>> xSet ([' A ', ' u ', ' G ', ' w ', ' n ')>>> y = set (' Yang ')>>> ySet ([' Y ', ' a ', ' g ', ' n '])>>> X-ySet ([' U ', ' W '])>>> x | YSet ([' A ',

RequirementsBy the user randomly given a two times equation coefficients a, B, C, to calculate the solution of a two-time equationSource CodeImport Cmath #包含复数运算import mathimport sysdef get_float (msg, AL Low_zero): x = None while X was none:try:x =

Python deletes redundant strings in the Android project. Android provides a convenient resource (language) Internationalization mechanism. To better support multiple languages, many engineering translations are usually placed on platforms like

Dictionary traversal memo in Python and python dictionary memo I have forgotten how to traverse the dictionary in python. There is not much technical content. It is only for my reference as a beginner. Copy codeThe Code is as follows:#!