The range () function developed by Python

The function of the range () function in Python is hen 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

code example:

#如果你需要遍历一个数字序列, you can use the built-in function in Python 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 generates a list for I in range (5): Print (    i,end= ', ') 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 10 length print (' range (10) indicates: ', Range (ListA) = [i-I in Range]]print (ListA)  print (' ##################################### ')  #当然, We can customize the starting and ending points we need # We've defined a starting point from 5 to the end of the 100 End print (' range (5,100) = ', 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 starting from 1 to 30 end, List print with step 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 Win32

Type "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, 10)

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

#####################################

Range (5,100) 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, 90, 91, 92, 93, 94 , 98, 99]

#####################################

Range (1,30,3) means: Range (1, 30, 3)

[1, 4, 7, 10, 13, 16, 19, 22, 25, 28]

>>>

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