Python笔试题：给定一个整数数组和一个目标值、找出数组中为2个俩个数、若无返回-1【杭州多测师】【杭州多测师_王sir】

class Test:
 
    def func(self):
        '''
        给定一个整数数组和一个目标值、找出数组中为2个俩个数、若无返回-1
        :return:
        '''
        list1=[-1,-2,4,3,1,0,2]
        # list1 = [-1,4,5]
        new=[]
        for i in range(len(list1)):
            for j in range(len(list1)-i-1):
                if list1[i]+list1[j] == 2:
                    new.append((list1[i],list1[j]))
        if new != []:
            print(new)
        else:
            print(-1)
 
    def reverse(self, x):
        a = 2**31-1   #int32最大值是：2147483647
        b = -(2**31)  #int32最小值是：-2147483648
        n = 0
        while x != 0:
            m = -(abs(x)%10) if x < 0 else x%10
            x = int(x/10)
            if n > int(a/10) or n == int(a/10) and m > 7:     # int32最大值是2147483647，最后一位是7
                return 0
            if n < int(b/10) or n == int(b/10) and m < -8:     # int32最小值是-2147483648，最后一位是8
                return 0
            n = n*10 + m
        return n
 
t = Test()
t.func()  #第一个题目
print(t.reverse(341))  #第二个题目