在Python中从字典中的特定值获取键

def get_key_from_value(dictionary, value):
    for key, val in dictionary.items():
        if val == value:
            return key
    return None

def get_key_from_value(dictionary, value):
    reverse_dict = {v: k for k, v in dictionary.items()}
    return reverse_dict.get(value)

def get_keys_from_value(dictionary, value):
    return [key for key, val in dictionary.items() if val == value]