range() function developed by python

The range() function in python is very powerful, so I feel it is necessary to share it with everyone

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

Code example:

#如果你需要遍历一个数字序列，可以是使用python中内建的函数range()
  
#如下面要遍历一个列表test_list
test_list = [1,3,4,'Hongten',3,6,23,'hello',2]
for i in range(len(test_list)):
    print(test_list[i],end=',')
  
print()  
print('#####################################')
  
#或者用range()函数生成一个列表
for i in range(5):
    print(i,end=',')
  
print()  
print('#####################################')
  
#python中的内置函数range(10),其中参数'10'代表：从0到10的一个序列
#即长度为10的一个序列
print('range(10)表示：',range(10))
listA = [i for i in range(10)]
print(listA)
  
print('#####################################')
  
#当然，我们可以自定义我们需要的起始点和结束点
#我们定义了一个从5开始的起始点，到100结束的结束点
print('range(5,100)表示：',range(5,100))
listB = [i for i in range(5,100)]
print(listB)
  
print('#####################################')
  
#定义了这些后，我们还可以定义步长
#下面我们定义一个从1开始到30结束，步长为3的列表
print('range(1,30,3)表示：',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 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, 95, 96, 97, 98, 99]

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

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

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

>>>