求 a 或 A 还有C 结尾的 元素
li = [‘Alix‘,‘ aric‘,‘alix‘,‘Tonc‘,‘rain‘]
dic = {‘k1‘:‘Alix‘,‘k2‘:‘ aric‘,‘k3‘:‘alix‘,‘k4‘:‘Tony‘,‘k5‘:‘rain‘}

for i in li:
    u = i.lstrip()
    w = u.find(‘A‘,0,1)
    q = u.find(‘a‘,0,1)
    e = u.find(‘c‘,2,4)
    if w==0 or q==0 or e==3 :
        print(u)

w = dic.values()
for z in w:
    u = z.lstrip()
    w = u.find(‘A‘,0,1)
    q = u.find(‘a‘,0,1)
    e = u.find(‘c‘,2,4)
    if w==0 or q==0 or e==3 :
        print(u)

输出商品列表，用户输入序号，显示用户所选中的商品
commodity = [‘手机‘,‘电脑‘,‘鼠标‘,‘键盘‘]

for i in commodity:
    w = commodity.index(i)
    print(w+1,i)
inp = input(‘请输入商品‘)
u = int(inp)
print(commodity[u-1])