Example analysis of range () function usage in Python development

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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