# 定义要检查的元素element_to_check="banana" 1. 2. 步骤3:使用in运算符进行判断 使用in运算符可以非常方便地判断一个元素是否在Set中,这个运算符返回一个布尔值,指示元素是否存在。 # 判断元素是否在Set中is_in_set=element_to_checkinfruits# 打印结果ifis_in_set:print(f"{element_to_check}在水果集合...
def check_element_in_set(s, elem): return elem in s my_set = {1, 2, 3, 4, 5} element_to_check = int(input("请输入一个元素来检查其是否在集合中: ")) if check_element_in_set(my_set, element_to_check): print(f"元素 {element_to_check} 在集合中。") else: print(f"元素 {...
element_to_check = 3 if next(filter(lambda x: x == element_to_check, my_list), None) is not None: print(f"{element_to_check} 存在于列表中。") else: print(f"{element_to_check} 不存在于列表中。") 1. 2. 3. 4. 5. 6. 5. 使用set转换 将列表转换为集合(set)能够大幅提高查找...
#使用 filter() 函数element_to_check = 3ifnext(filter(lambdax: x == element_to_check, my_list), None)isnotNone:print(f"{element_to_check} 存在于列表中。")else:print(f"{element_to_check} 不存在于列表中。")5. 使用 set 转换 将列表转换为集合(set)能够大幅提高查找速度,因为集合是哈希...
Upon execution, the above program returns false, as set "b" is not a subset of "a". False Here, we have two programs in both we have used issubset() method to check if "a" and "b" are subset of each other. Since all element of "a" are present in "b". so, output comes...
Checking if the element is present in tuple In this article, we are given a tuple and an element. Our task is to create a python program to check if the given element is present in the tuple. Input: (4, 1, 7, 8, 2) ele = 4 ...
print放到循环外面就可以了。另外，这种结构我觉得你应该考虑用dict def get_student_name(matric_num, records): for i in student_records: if i[0] == matric_num: return i[1] return "Not found"你把你的所有句子站出来
if : found == true print "found" else : print "not found" Program to check if an element is present in the list # Python program to check if an# element exists in list# Getting list from usermyList=[]length=int(input("Enter number of elements: "))foriinrange(0,length):value=in...
File "<stdin>", line 1, in <module> NameError: name 'a' is not defined 解决方案: 先要给a赋值。才能使用它。在实际编写代码过程中,报NameError错误时,查看该变量是否赋值,或者是否有大小写不一致错误,或者说不小心将变量名写错了。 注:在Python中,无需显示变量声明语句,变量在第一次被赋值时自动声明...
1 if __name__=='__main__': 2 test() __name__ 是当前模块名,当模块被直接运行时模块名为 __main__ 。这句话的意思就是,当模块被直接运行时,代码将被运行,当模块是被导入时,代码不被运行。 更好的例子是为了代码重用。比如你现在写了一些程序,都存在单独的py文件里。有一天你突然想用1.py文件...