做一个小总结吧,把别人的经验拿来总结一下

构造一个1, 3, 5, 7, ..., 99的列表，可以通过循环实现：

取list的前一半的元素，也可以通过循环实现:

1. L = []

  n = 1 while n <= 99: L.append(n) n = n + 2

2.  L = list(range(1,100,2)) print(L)

      print(L[:len(L)//2])

3.  L = list(filter(lambda x: x%2 == 1, range(1,100)))

  print(L[:int(len(L)//2)])

4. L=[] n=1 for n in range (1,99,2): L.append(n) print(L[:len(range (1,99,2))])

 5.  L = list(range(1,100,2)) print(L)

6.  L = list(range(1,100,2)) print(L[0:(len(L)/2)])

7. # 构造奇数list L: [1, 3, 5, 7, 9, 11, 13, 15, 17, 19]

L = [] for n in range(1, 20, 2): L.append(n) print('L:', L) # 取list的前一半的元素 H: [1, 3, 5, 7, 9] H = [] for i in range(0, int(len(L) /2)): H.append(L[i]) print('H:', H)



L = list(range(1, 20, 2)) print('L:', L) H = L[:int(len(L) /2)] print('H:', H)

8. L=[]

for i in range(1,100,2): n = i L.append(n)

if 99 in L: print (L)
9. L=list(range(100)) print(L[1:50:2]) 最简单的写法，切片写法

10.print([i for i in range(1,99,2) if i <99/2])
11. L = list(range(1,99,2)) s = L[:len(L)//2] print(s)
12.L = [n for n in range(1, 99, 2)] print(L[:len(L)//2])
13.l=[]

n=1

while n<=99: l.append(n) n=n+2 print(l[:len(l)/2])
14. L = [n for n in range(1, 99, 2)] print(L[:(len(L)//2)+1]) 这样才对