Python custom function to determine whether a certain element is included in the list

#函数：判断列表中是否包含某个元素
#输入：inputlist:待查找列表，i:待查找元素
#输出：flag：存在=1，不存在=0
def ZrJgd(input_list,i):
    if i in input_list:
        flag=1
    else:
        flag=0
    return flag
mylist=[1,10,4,5,689]
result=ZrJgd(mylist,689)
print(result)
result1=ZrJgd(mylist,58)
print(result1)

Output:

1
0