方法1:使用循环比较列表 list1 = [1, 2, 3, 4, 5] list2 = [3, 4, 5, 6, 7] common_elements = [] different_elements = [] for item in list1: if item in list2: common_elements.append(item) else: different_elements.append(item) for item in list2: if item not in list1: dif...
要判断两个列表是否互相包含,我们可以使用in操作符遍历一个列表,并逐个判断其元素是否存在于另一个列表中。以下是一个简单的示例代码: defis_contained(list1,list2):foriteminlist1:ifitemnotinlist2:returnFalsereturnTruelist1=[1,2,3]list2=[3,2,1]print(is_contained(list1,list2))# 输出:True 1. ...
示例:pythonelements = [1, 2, 3, 4, 5]to_check = [3, 6]for item in to_check: if item not in elements: print这段代码会输出 “6 不在元素列表中”,因为 6 不在列表 [1, 2, 3, 4, 5] 中。注意:not in 操作符返回的是一个布尔值,因此它经常与 if 语句...
for item in my_list: if isinstance(item, int): print(item + 1) else: print(f"Item {item} is not an integer") 3. 值错误(ValueError) 原因:传递给函数的参数虽然类型正确但值不合适。示例代码: 代码语言:txt 复制 my_list = [1, 2, "three"] int_list = [int(x) for x in my_list]...
ValueError: 2 is not in list 1. 2. 3. 4. 如果该项目可能不在列表中,您应该 首先检查它item in my_list(干净,可读的方法),或 将index呼叫包裹在try/except捕获的块中ValueError(可能更快,至少当搜索列表很长时,该项通常存在。) 大多数答案解释了如何查找单个索引,但如果项目在列表中多次,则它们的方法不...
我们只需使用in运算符即可完成此操作。 games = ['Yankees', 'Yankees', 'Cubs', 'Blue Jays', 'Giants'] def isin(item, list_name): if item in list_name: print(f"{item} is in the list!") else: print(f"{item} is not in the list!") ...
当在if 语句中运行条件时,Python 返回 True 或 False a = 200 b = 33 if b > a: print("b is greater than a") else: print("b is not greater than a") bool() 函数可让您评估任何值,并为您返回 True 或 False print(bool("Hello")) ...
Find if an element exists in the list using a loopPython offers a straightforward approach that involves iterating over each item in the list and checking for a match to find if an element exists in the list using a loop. This method is particularly useful when you need to perform ...
if"address"ind:print(d["address"]) 用词典的get方法获取键值 print(d.get("address")) 8.TabError: inconsistent use of tabs and spaces in indentation 缩进同时使用了空格和Tab。Tab和空格是不同的键,互相不等同。 s = 0 for i in range(1 , 6): ...
for i in range(10): egg_list.append('鸡蛋%s' %i) egg_list=['鸡蛋%s' %i for i in range(10)] #2、语法 [expression for item1 in iterable1 if condition1 for item2 in iterable2 if condition2 ... for itemN in iterableN if conditionN ] 类似于 res=[] for item1 in iterable1: ...