#查詢元素是否在tuple內，有七種方法
#(1).if txt in a
#(2).res = a.index(s)
#(3).matches = [x for x in lst if fulfills_some_condition(x)]
#(4).matches = (x for x in lst if x > 6)
#(5).next(x for x in lst if ...)
#(6).for index, sublist in enumerate(lists):
#if sublist[0] == key:
#(7).[i for i,x in enumerate([1,2,3,2]) if x==2]

#方法2：查詢元素a.index(txt)
#[1,2,3].index(2) # => 1
#[1,2,3].index(4) # => ValueError

a=['tom','mike','peter','yellow']
name = input('請輸入查詢姓名？')
try:
   res =  a.index(name)
   print(name + '找到了，在編號為' + str(res) +'的位置')
except ValueError:
    print(name +'找不到')