下面是一个示例: deffind_indexes(tup,elements):indexes={}forelementinelements:try:indexes[element]=tup.index(element)exceptValueError:indexes[element]=Nonereturnindexes students=("Alice","Bob","Charlie","David")elements
一、数据容器简介 Python 中的 数据容器 数据类型 可以 存放多个数据 , 每个数据都称为 元素 , 容器 的 元素 类型可以是任意类型 ; Python 数据容器 根据 如下不同的特点 : 是否允许元素重复...是否允许修改是否排序分为五大类 : 列表 List 元组 tuple 字符串 str 集合 set 字典 dict 下面从 列表 List 开...
ES.text_to_be_present_in_element(locator, value))returneledef__not_find_value(self, locator, timeout, value):ifvalueisNone:#presence_of_element_located 不关心元素是否可见,只要元素存在在页面中即可bools =WebDriverWait(self.driver, timeout, SettingBase.POLL_FREQUENCY).until_not( ES.presence_of...
示例代码: # 提取列表元素my_list=[1,2,3,4,5]element=my_list[2]print(element)# 输出3# 提取元组元素my_tuple=('apple','banana','cherry')element=my_tuple[1]print(element)# 输出banana# 提取字符串中的字符my_string='Hello, World!'character=my_string[7]print(character)# 输出W 1. 2. 3...
if target in lst: return target else: return None result: Optional[str] = find_element(["apple", "banana", "cherry"], "kiwi")2.2.3 Any类型(Any) Any代表任意类型,通常用于无法精确指定类型或者需要兼容多种未知类型的情况。使用时需谨慎,因为它会削弱类型检查的效果: ...
for element in search: if element == target: print("I found it!") break else: print("I didn't find it!") while i < len(search): element = search[i] if element == target: print("I found it!") break i += 1 else:
2、元组(Tuple):元组是有序的不可变序列,一旦创建就不能修改,由圆括号()定义。虽然不能直接改变...
In the above example, we have used theindex()method to find the index of the element'i'with the start and end parameters. Here,'i'is scanned from index4to index7in the tuplealphabets. Once found, the index of the scanned'i'is returned. ...
checkcode=''foriinrange(4):#循环4次,相当于4位长度的验证码 current=random.randint(0,4)#设定current随机数字与range范围相等ifcurrent==i:tmp=chr(random.randint(65,90))#随机匹配:当current等于i时,就随机一个字母else:tmp=random.randint(0,9)#当current不等于i时,就随机一个数字 ...
Then, we use thenp.where() functionto search for elements inmy_arraythat are equal totarget_element. Thenp.where()function returns a tuple with indices where the condition is true, and in this case, we access the first element of the tuple[0]to retrieve the matching indices. ...