python create menu from list

#python List‘‘‘There are many ways to create a list:1. Create an empty list:[with one square bracket]2. Use a pair of brackets, with ', ' to separate the elements inside: [A, B, C], [a]3.Using a

Tuple, list, dict, and pythontuple in Python ------------------------------- Updating -------------------------------------- Tuple ): Tuples are commonly represented by parentheses (). The elements are identified by commas. 1 # define a tuple 2 3 # tuple = 'A', 4 5 tuple = ('A', 'B', 'C', 'D', 'E ', 'F', 'G') 6 7 # In general, after defining a tuples, you cannot add or modify the elements of the tuples,

Tag: Indicates a disadvantage associated with a slice element in the case of an Operation collectionFirst, List1. An ordered set of arbitrary objects A list is a set of values of any type, combined in a certain order. 2. Read by offset The values that make up the list are called elements (Elements). Each element is identified by an index, the first index is 0, and the function of the sequence can be impleme

Python implementation compares the two list ranges, pythonlist One question: compare two lists. If the list contains values, TRUE is returned; otherwise, FALSE is returned. The detailed questions are as follows: Create a function, this function extends es two lists as parameters, each

: >>> [1,2,3]+[4,5,6] [1, 2, 3, 4, 5, 6] >>> ' Hello. ' + ' world! ' ' hello.world! ' >>> [1,2,3]+ ' world! ' Traceback (most recent call last):File "[1,2,3]+ ' world! 'Typeerror:can only concatenate list (not "str") to List Multiplication Multiplying the number x by a sequence produces a new sequence, and in the new sequence the original sequence is repeated x times Co

() again on the list.? Use the function Len () to quickly learn the length of a list? Traverse List? Magicians = [' Alice ', ' David ', ' Carolina ']? For magician in Magicians:? Print (magician)? For value in range (1,5):Print (value)//printing number 1-4? Numbers = List (range (1,6))Print (numbers)//store 1-5 of num

1. List generation is one of the most popular syntax for Python, with a simple syntax to filter a set of elements and to convert the resulting elements into a syntax format: for inch if condition]EquivalentResul = [] for in collection: if(condition): Result.appen (exp)Example: Ask 1 to 10 of even squares, the code is as follows:Li = [x*x for in if x%2==0]print (LI)Results: [4, 16, 36, 64, 100]Exp

list derivation, below is my test results in Ipython (test environment Python 2.7.10): >>> long_list = range(1000)>>> a = []>>> %timeit for i in long_list: a.append(i+1)10000 loops, best of 3: 100 µs per loop>>> %timeit [i+1 for i in long_list]10000 loops, best of 3: 43.3 µs per loopA little more efficient, to see the DIS module. Python does not like FP, and

Use Python to create your Eclipse Although the Eclipse advanced script environment (IDEA) project is still under development, you must acknowledge that it is very powerful, which allows us to quickly build our own Eclipse development environment. Based on the powerful Eclipse framework, you can use its built-in plug-in system to fully expand Eclipse. However, writing and deploying a new plug-in is still ve

In all of Python's data structures, list is important and convenient, and this article is mainly about the advanced application of list lists, and the basics can be viewed in blogs. This article is a translated version of the Python English document, you can also view the English version: https://docs.python.org/2/tutorial/datastructures.html Use a

List Parsing Let's take a look at the following example, which is to get the square of each integer from 1 to 9 and print the result in the list >>> Power2 = []>>> for i in Range (1,10): ... Power2.append (i*i) ... >>> power2[1, 4, 9, 16, 25, 36, 49, 64, 81] Python has a very interesting function, that is, list pa

This article mainly introduces the application details of python dict, set, list, And tuple. For more information, see this article, the tuple application and corresponding examples help readers understand its concepts and principles. The details are as follows: 1. Dictionary (dict) Dict surrounded {}Dict. keys (), dict. values (), dict. items ()Hash (obj) returns the hash value of obj. If it is returned,

The Python list is a more important Python data type, as described below:First, create a listList1=[' A ', ' B ', ' C ', ' d ']list2=[' 1 ', ' 2 ', ' 3 ', ' 4 ']list3=[' sports ', ' News ', ' mnt ', ' Mile ']Lists, like some Linux data types, are accessed starting from 0.Second, access to the

This article is a detailed introduction of Python in the list of the advanced functions, interested in the small partners can refer to Use a list as a stack: #像栈一样使用列表 stack = [3, 4, 5] stack.append (6) stack.append (7) Stack [3, 4, 5, 6, 7] Stack.pop () #删除最后一个对象 7 Stack [3, 4, 5, 6] stack.p OP () 6 Stack.pop () 5 Stack [3, 4] Use a

List of knowledge points1. Create a listAssign a value to a variable a list shape such as: List = []the list is empty and can be solid such as: List_name =[' Ergou ', ' Goudan ', ' Xiaolizi ']2. Operation of the listEverything you create