Python的range()

函数原型：range（start， end， scan):

参数含义：start:计数从start开始。默认是从0开始。例如range（5）等价于range（0， 5）;

             end:技术到end结束，但不包括end.例如：range（0， 5） 是[0, 1, 2, 3, 4]没有5

             scan：每次跳跃的间距，默认为1。例如：range（0， 5） 等价于 range(0, 5, 1)

 

range的类型：Python 2.x range() produced a list, and xrange() returned an iterator - a sequence object. in Python 3.x, the range() function got its own type.

有趣的用法： 倒序 for i in range ( 99 , 0 , - 1 ) :

浮点数的range：

>>> # Note: All arguments are required.
>>> # We're not fancy enough to implement all.
>>> def frange(start, stop, step):
...     i = start
...     while i < stop:
...         yield i
...         i += step
...
>>> for i in frange(0.5, 1.0, 0.1):
...         print(i)
...
0.5
0.6
0.7
0.8
0.9
1.0

 

求最大公约数，最小公倍数： （5-15.py)

def maxpub(a,b):
	
	a = int(a)
	b = int(b)
	if a>=b:
		small = b
		large = a
	else:
		small = a
		large = b
	pub = 1
	
	#should include small in range
	#range(2,small+1)
	for i in range(2,small+1):
		i = i
		if (small%i==0 and large%i == 0):
			pub = pub * i
			small = small/i
			large = large/i
			continue
		else:
			i = i + 1
	return pub

def smallpub(a,b):
	a = int(a)
	b = int(b)
	return a*b/maxpub(a,b)

 

http://www.pythoncentral.io/pythons-range-function-explained/