Example analysis of range () function usage in Python development

Source: Internet
Author: User
This example describes the use of the range () function in Python development. Share to everyone for your reference, as follows:

The range () function in Python is very powerful, so I think it is necessary to share with you

As described in its API:

If you don't need to iterate through a sequence of numbers, the built-in function range () comes in handy. It generates arithmetic progressions

Here is the demo I made:

#如果你需要遍历一个数字序列, can be used in Python built-in function range () #如下面要遍历一个列表test_listtest_list = [1,3,4, ' Hongten ', 3,6,23, ' hello ', 2]for i in Range (len (test_list)): Print (  test_list[i],end= ', ') print (  ' ##################################### ') #或者用range () function to generate a list for I in range (5): Print (  i,end= ', ') print () print (  ' ################################## # # # ') #python中的内置函数range (10), where the parameter ' 10 ' stands for: a sequence of 0 to 10 # that is a sequence of length 10 print (' Range (10) ' means: ', range ') ListA = [I for I in Range (ListA) print (' ##################################### ') #当然, we can customize the starting and ending points we need # We've defined a starting point starting from 5,]print. To 100 end of the end point print (' range (5,100) means: ', Range (5,100)) Listb = [I for I in range (5,100)]print (LISTB) print (' ################# #################### ') #定义了这些后, we can also define the step # below we define a list print from 1 to 30, with a step size of 3 (' Range ' 1,30,3: ', Range (1,30,3)) LISTC = [I for I in range (1,30,3)]print (LISTC)

Operating effect:

Python 3.3.2 (V3.3.2:d047928ae3f6, May, 00:03:43) [MSC v.1600 + bit (Intel)] on Win32type "copyright", "credits" or "license ()" For more information.>>> ================================ RESTART =========================== =====>>> 1,3,4,hongten,3,6,23,hello,2,#################################### #0, 1,2,3,4,################# ################### #range (10) means: Range (0, ten) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]#################################### #range (5,1 00) means: Range (5, 100) [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 , 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89 , 94, 98, 99]#################################### #range (1,30,3): Range (1, 30, 3) [1, 4, 7, 10, 13, 16, 19 , 28]>>>,

I hope this article is helpful for Python program design.

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