#列表可修改, the Yuan Zu cannota=['sdsd',]b=['SDS',]c=[a,b]#分片 :-#list函数#分片赋值#列表方法Lst.append (4) X.count (1) x.count ([up]) A.extend (b) a.index ("w" ) A.insert (3, "all")X.removeX.reverseX.sort#pop removes the list element and returns a value. Implementation data structure-stack, LIFO (LIFO), X.append (X.pop ()), FIFO, X.insert (X.pop (0)#sortX.sort (Key=len)y=sorted (x)#y元祖No list-like methods(a)#tuple函数# become a meta-ancestorPython Basic Learning Note
#模块#包#模块中有什么Dir L List features#文档Print range.__doc__#阅读源代码Print copy.__file__#标准库Sysosfileinput#集合, heap and double-ended queuesSet (range) Thecollection heap data structure is not independent of only one module containing some heap operations, called HEAPQ (6 functions) Double-ended queue#time#random#shelve#re# contains support for regular expressionsPython Basic Learning Note--python Basic
' + input (' Your name: ')Typeerror:cannot concatenate ' str ' and ' int ' objectsIf you want to write a long string that spans multiple lines, you can use three quotation marks instead of ordinary quotes, such asPrint " " This is a long string.it continues here.and It's not over yet. " Hello world! ". Still here. " "The results are as followsThis is a long string.It continues here.And it ' s not over yet."Hello world!".Ordinary strings can also span rows, and if the last character in a row is
Axure8.0 Basic Tutorial (11-20) AxureRP8 basic Operations
directory of this document
Base 11. Set text box input as password
Base 12. Set Open Select File window
Base 13. Limit text box input character digits
Base 14. Set text box hint text
Base 15. Set the text box carriage return trigger event
Base 16. Tips for setting the mouse cursor in a component
Base 17.
This article mainly introduces the definition of the basic Javascript tutorial and relevant information about calling functions. For more information, see the function as a statement that can be run at any time. to put it simply, A function is a set of statements used to complete a function. it accepts 0 or multiple parameters.
Basic Function SyntaxAs follows:
This article mainly introduces the basic learning tutorial on prototype inheritance in JavaScript. prototype-based inheritance is the basic method for implementing the inheritance features in Object-Oriented JavaScript, for more information, see classes and objects in most programming languages. One class can inherit other classes.
In JavaScript, inheritance is p
Basic tutorial for Android -- 2.4.9 basic usage of the GridView (grid view)1. related attributes:
The following are some properties in the GridView:
Android: columnWidth: Set the column width
Android: gravity: Component Method
Android: horizontalSpacing: Horizontal distance of each cell
Android: verticalSpacing: Vertical distance of each cell
Android: numCo
use a backslash to escape the backslash itself. Such as:But when the string inside itself with a lot of backslashes, it is very troublesome. The second workaround is to use the original string notation.The original string starts with R and can put any character in the string, and the only requirement is that the last character is not allowed to be a backslash. If the only requirement is met, you can assume that any character in a string is part of the string itself.21. Unicode string:is not the
Use Python as a calculator division operationWhen using/representing division operations, we generally get floating-point numbers, and if we need to get integers, we can use the operator//Remainder calculation%Power exponentiationSystem built-in variables _Built-in variable _, which stores the most recent results.StringStrings can be concatenated (glued together) by the + operator and can be duplicated by *, and adjacent two string literals are automatically concatenated together.Error usage:x =
"Dog planing Learning Net"IntroductionIn the first article"Unity3d Basic Tutorial" for beginners to see the Unity Tutorial (a): Gameobject,compoent,time,input,physicsI've already talked about the relationship between rigid bodies and collisions, and this time we'll go through the example of Flappy Bird to explain the s
This article mainly introduces the relevant information about the event type in the basic DOM tutorial. For more information about the event types, see mouse, keyboard, and browser.
1. mouse events:
Mouse events are frequently used. The following example shows how to test various mouse events.
The Code is as follows:
This article mainly introduces the if condition statement in the basic Javascript tutorial. if is a common syntax, you can refer to it as follows:
If (coditon) statement1 (else statement2)
Coditon can be any expression, or even a Boolean value, because JavaScript will automatically convert it to a Boolean value.
If the condition execution result is true, statement1 is executed. if the condition is fals
1, Version number description(1) Latest Version number: 3.3.0(2) Latest release version number: 3.2.0(3) Important historical version number: 1.14.43.1.0 and previous version number: http://sourceforge.net/projects/archive-crawler/files/3.2.0 and later version number: http://archive.org/Because the country needs, the latter can not access, so this blog research is 1.14.4 version number.2. Official materialssource:http://sourceforge.net/projects/archive-crawler/files/archive-crawler%20%28heritrix
iteration, put the corresponding content in the iterable into the Iter_var, and then apply the content of the Iter_var in the expression, Finally, a list is generated with the calculated value of the expression. than we're going to generate a list containing 1 to 10 >>> [x for x in range (1,11)] [1, 2, 3, 4, 5, 6, 7, 8, 9, ten] >> 2. Added the judgment statement, only satisfies the condition content to put in the iterable the corresponding content in the Iter_var, then applies the conten
This article mainly introduces the while statement related to the basic Javascript tutorial. For more information, see the loop statement to execute the same code repeatedly. Although there are several different types, however, the principle is almost the same. As long as the given conditions are met, the statements contained in the loop will be executed continuously and terminated once the conditions are n
This article mainly introduces the if Condition Statement in the basic Javascript tutorial. if is a common syntax, you can refer to it as follows:
If (coditon) statement1 (else statement2)
Coditon can be any expression, or even a Boolean value, because JavaScript will automatically convert it to a Boolean value.
If the condition execution result is true, statement1 is executed. If the condition is fals
Basic PHP and MySQL Tutorial This chapter describes how to use PHP to manipulate the MySQL database, including connection to the database, close the database connection sample Execute SQL statement get query result set, get SQL statement execution error information, get all the records in the result set, pagination display data, data Insert Database, Submit User Information HTML page, display data informati
I am very depressed, this book really said very detailed, I am looking at chapter II, after reading to take a deep breath, really too detailed (Lao) fine (DAO).But that's good, and the hard stuff behind it should be good.So, this chapter just as a preview of the chapter, I take out some slightly more nutritious content to record it ~Note: This series of tutorials is not suitable for friends without any programming language basis, but as a supplement to the C + + Foundation.The
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