如何从字典中返回某些键、值并打印新字典

def filter_dict(dictionary, keys=None, values=None):
    new_dict = {}
    
    # 根据指定的键来筛选
    if keys:
        for key in keys:
            if key in dictionary:
                new_dict[key] = dictionary[key]
    
    # 根据指定的值来筛选
    if values:
        for key, value in dictionary.items():
            if value in values:
                new_dict[key] = value
    
    return new_dict

# 示例字典
my_dict = {
    'name': 'John',
    'age': 25,
    'city': 'New York',
    'country': 'USA'
}

# 根据键来筛选并打印新字典
filtered_dict_by_keys = filter_dict(my_dict, keys=['name', 'age'])
print(filtered_dict_by_keys)

# 根据值来筛选并打印新字典
filtered_dict_by_values = filter_dict(my_dict, values=['New York'])
print(filtered_dict_by_values)