练习一，逐一显示指定列表中的所有元素；

//方法一
In [25]: l1
Out[25]: [1, 2, 3, 4]In [26]: while l1:....:     print l1[0]....:     l1.pop(0)....:
1
2
3
4//方法二
In [66]: count = 0In [67]: count
Out[67]: 0In [68]: while count < len(l1):....:     print l1[count]....:     count += 1....:
1
2
3
4

练习二，求100以内所有偶数之和；

In [215]: sum = 0; i = 0In [216]: while i <= 100: .....:     i+=1.....:     if i % 2 == 0:.....:         sum = sum +i.....:         In [217]: print sum
2550

练习三，逐一显示指定字典的所有值，并于显示结果结束后说明总键数；

In [91]: print d1
{'y': 45, 'x': 2, 'z': 90}In [95]: while keylist:....:     print keylist[0]....:     keylist.pop(0)....: else:....:     print len(d1)....:
y
x
z
3

练习四，创建一个包含了100以内所有奇数的列表；

In [96]: l1 = []In [97]: x = 1In [98]: while x < 100:....:     l1.append(x)....:     x += 2....:     In [99]: print l1
[1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99]

练习五，逆序逐一显示一个列表的所有元素；

In [34]: l1 = [1,2,3,4]In [35]: while l1:....:     print l1[-1]....:     l1.pop()....:
4
3
2
1

练习六，列表l1=[0,1,2,3,4,5,6]，列表l2=["Sun","Mon","Tue","Wed","Thu","Fri","Sat"] ，以第一个列表中的元素为键，以第二个列表中的元素为值生成字典d1；

In [120]: d1={}In [121]: x=0In [122]: l1=[0,1,2,3,4,5,6]In [123]: l2=["Sun","Mon","Tue","Wed","Thu","Fri","Sat"] In [130]: while x < len(l1):d1[l1[x]] = l2[x]x += 1.....:     In [131]: print d1
{0: 'Sun', 1: 'Mon', 2: 'Tue', 3: 'Wed', 4: 'Thu', 5: 'Fri', 6: 'Sat'}