my_dict={'a':1,'b':2,'c':3,'d':1}value_to_find=2key=find_key_by_value(my_dict,value_to_find)ifkeyisnotNone:print(f"The key corresponding to value{value_to_find}is{key}.")else:print(f"The value{value_to_find}does not exist in the dictionary.") 1. 2. 3. 4. 5. 6...
解法二，想通过交换key、value的值来获取key:new_scores={v:kfork,vinscores.items()}keys=new_score...
DictionaryFunctionUserDictionaryFunctionUser调用 find_key_by_value(dictionary, value)遍历字典,查找匹配的键值对返回匹配的键返回匹配的键 示例代码 下面是一个使用find_key_by_value函数的示例代码: dictionary={'a':1,'b':2,'c':3,'d':2}value=2key=find_key_by_value(dictionary,value)print(key)# ...
items(): if val == value: return key return "There is no such Key" print(get_key(1)) print(get_key(2)) Output: John Michael Use .keys() and .values() to Find Key by Value in Python Dictionary dict.keys() returns a list consisting keys of the dictionary; dict.values() ...
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Python dictionaries can also be created using the dict() constructor by simply providing a list or tuple of comma-separated key-value pairs. This constructor keeps track of the insertion order of key-value pairs in the dictionary. Before Python 3.6, we used to rely on OrderedDict class of th...
然后,我们定义了要搜索的值search_value为5。接下来,我们使用列表推导式和内置函数items()来遍历字典中的键值对。如果搜索值存在于值的数组中,我们将键添加到结果列表中。最后,我们打印结果。 这种方法的优势是简洁高效,可以快速搜索包含数组的字典中的值。它适用于需要快速查找特定值的场景,例如在大型数据...
Find Duplicate Values in Dictionary Python using Reverse Dictionary Thereversedictionary approach treats the key as a value and the value as a key. A reverse dictionary is created; if the value exists in the reverse dictionary, it is a duplicate. ...
在Python编程语言的宇宙里,字典(dictionary)是一种非常强大的数据结构,它以键-值对(key-value pairs)的形式存储信息,类似于现实生活中的一本详尽的索引目录。每个键都是独一无二的 ,用于标识与其相关联的特定值。字典的魅力在于它提供了近乎瞬时的查找速度 ,这得益于其内部实现的哈希表机制。与列表或元组不同 ,...
By performing operations directly on the dictionary The Python dictionary can also be sorted without converting the items to a list. Here are the ways to do it. Using a for Loop By using a for loop along with the sorted() function in Python, we can sort the dictionary by value. Here ...