Example Analysis of range () function usage in python development, pythonrange

Example Analysis of range () function usage in python development, pythonrange

This article describes the usage of the range () function in python development. We will share this with you for your reference. The details are as follows:

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

As described in its API:

If you do need to iterate over a sequence of numbers, the built-in function range () comes in handy. It generates arithmetic progressions

Below is my demo:

# If you need to traverse a numerical sequence, you can use the built-in function range () in python # For example, to traverse a list 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 () print ('##################################### ') # Or use the range () function to generate a list for I in range (5): print (I, end = ',') print () print ('##################################### ') # The built-in function range (10) in python. The parameter '10' indicates a sequence from 0 to 10. # print ('range (10) a sequence with a length of 10) ', range (10) listA = [I for I in range (10)] print (listA) print ('##################################### ') # Of course, we can customize the starting and ending points we need # We define a starting point from 5, and the ending point from 100 print ('range (5,100) indicates: ', range (5,100) listB = [I for I in range (5,100)] print (listB) print ('##################################### ') # After defining these parameters, we can also define the step size # below we define a list of print ('range (, 3) with the step size from 1 to 30: ', range (1, 30, 3) listC = [I for I in range (1, 30, 3)] print (listC)

Running effect:

Python 3.3.2 (v3.3.2: d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32Type "copyright", "credits" or "license () "for more information. >>> ================================== RESTART ======== ========================================>> 1, 3, 4, Hongten, 3, 6, 23, hello, 2,, 2, 3, 4, ##################################### range (10) range (0, 10) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] ##################################### range (5,100) 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, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99] ##################################### range (1, 30, 3) indicates range (1, 30, 3) [1, 4, 7, 10, 13, 16, 19, 22, 25, 28] >>>

I hope this article will help you with Python programming.