# -*- coding: utf-8 -*-
"""
Created on Thu Jun 25 11:26:46 2020

@author: user
"""


#查詢元素是否在set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]

a={'tom','mike','peter','yellow'}
#方法1：if name in a
def find_set1(name,a):
    if name in a:
        return name + '存在set內'
    else:
        return name + '不存在set內'

name = input('請輸入查詢姓名？')
res = find_set1(name,a)
print(res)

#方法2：[i for i in a if name==i]
def find_set2(name,a):
    ans = [v for v in a if name == v]
    return ans
    
name = input('請輸入查詢姓名？')
res = find_set2(name,a)
if res==[]:
    print(name+'找不到')
else:
    print(name+'找到了',res)