遍历字典并使用集合(set)来存储所有的键,然后找出重复的键。这种方法适用于较小的字典。 代码语言:python 代码运行次数:0 复制 deffind_duplicate_keys(dictionaries):all_keys=set()duplicate_keys=set()fordictionaryindictionaries:forkeyindictionary.keys():ifkeyinall_keys:duplicate_keys.add(key)else:all_key...
Pythondictionaryis a container of key-value pairs. It is mutable and can contain mixed types. A dictionary is an unordered collection. Python dictionaries are called associative arrays or hash tables in other languages. The keys in a dictionary must be immutable objects like strings or numbers. ...
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...
If you ever need to find the minimum and maximum value stored in a dictionary, then you can use the built-in min() and max() functions: Python >>> computer_parts = { ... "CPU": 299.99, ... "Motherboard": 149.99, ... "RAM": 89.99, ... "GPU": 499.99, ... "SSD...
frompypinyinimportpinyindefget_pinyin(word):return''.join([x[0]forxinpinyin(word)])defsearch_hanzi(text,keyword):pinyin_keyword=get_pinyin(keyword)ifpinyin_keywordinget_pinyin(text):returnTrueelse:returnFalsewithopen('D:\\PyCharmProjects\\Python-knowledges\\blog-essay\\find_dictionary\\test','...
def find_key_in_list_of_dicts(target_value, list_of_dicts): for dictionary in list_of_dicts: if target_value in dictionary.values(): return dictionary.keys()[list(dictionary.values()).index(target_value)] return None # 示例用法 list_of_dicts = [ {"name": "Alice", "age": 25}, ...
Find Dictionary Length We can find the length of a dictionary by using thelen()function. country_capitals = {"England":"London","Italy":"Rome"} # get dictionary's lengthprint(len(country_capitals))# Output: 2 numbers = {10:"ten",20:"twenty",30:"thirty"} ...
Print the "brand" value of the dictionary: thisdict ={ "brand":"Ford", "model":"Mustang", "year":1964 } print(thisdict["brand"]) Try it Yourself » Ordered or Unordered? As of Python version 3.7, dictionaries areordered. In Python 3.6 and earlier, dictionaries areunordered. ...
Find a length of a dictionary In order to find the number of items in a dictionary, we can use the len() function. Let us consider the personal details dictionary which we created in the above example and find its length. person = {"name": "Jessa", "country": "USA", "telephone":...
python position = s.find('world') # 返回子串'world'的开始索引 使用replace()方法替换字符串中的内容: python rep = s.replace('world', '世界') # 结果: "hello 世界" 字符串大小写转换 title()方法将字符串中每个单词的首字母大写,其余小写: name = 'hello world' print(name.title()) # 结果:...