Python 字典(Dictionary) get() 函数返回指定键的值。语法get()方法语法:dict.get(key[, value]) 参数key -- 字典中要查找的键。 value -- 可选,如果指定键的值不存在时,返回该默认值。返回值返回指定键的值,如果键不在字典中返回默认值 None 或者设置的默认值。
可以给get()方法添加一个默认值,用于当key不存在时返回。 AI检测代码解析 # 使用get()方法和默认值address=my_dict.get("address","未知地址")print(address)# 输出: 未知地址 1. 2. 3. 总结 通过以上示例,我们了解到如何在Python字典中根据key获取对应的value。你可以选择使用方括号或get()方法,根据需要处...
def get_key_from_value(dictionary, value): for key, val in dictionary.items(): if v...
我们可以使用get()方法来获取多个键对应的值,代码示例如下: # 创建一个字典person={'name':'Alice','age':25,'gender':'female','occupation':'engineer'}# 定义要获取的键列表keys=['name','age','city']# 使用get()方法获取多个键对应的值values=[person.get(key)forkeyinkeys]# 输出结果print(value...
首先要知道python字典中的key（键）是唯一的，value（值）不是唯一的：def get_key_from_value(...
print d.get('key', 'not found') Discussion Want to get a value from a dictionary but first make sure that the value exists in the dictionary? Use the simple and usefulgetmethod. If you try to get a value with a syntax such asd[x], and the value ofxis not a key in dictionaryd...
字典(Dictionary)是Python中常用的数据结构之一,用于存储键值对(key-value pairs)。字典的特点是可变的、无序的,且键(key)必须是唯一的,但值(value)可以重复。 在字典中,每个键都与一个值相关联,可以使用键来访问对应的值。字典在 Python 中非常灵活,适用于各种不同的应用场景。
If you wanted to sort a dictionary in-place, then you’d have to use the del keyword to delete an item from the dictionary and then add it again. Deleting and then adding again effectively moves the key-value pair to the end. The OrderedDict class has a specific method to move an ite...
Python Dictionary: Create a new dictionary, Get value by key, Add key/value to a dictionary, Iterate, Remove a key from a dictionary, Sort a dictionary by key, maximum and minimum value, Concatenate two dictionaries, dictionary length
Example 1: Python Dictionary fromkeys() with Key and Value # set of vowelskeys = {'a','e','i','o','u'}# assign string to the valuevalue ='vowel' # creates a dictionary with keys and valuesvowels = dict.fromkeys(keys, value) ...