如何从嵌套对象生成查询字符串

def generate_query_string(obj, prefix=''):
    query_string = ''
    
    if isinstance(obj, dict):
        for key, value in obj.items():
            if isinstance(value, dict) or isinstance(value, list):
                if prefix == '':
                    new_prefix = key
                else:
                    new_prefix = f'{prefix}[{key}]'
                query_string += generate_query_string(value, new_prefix)
            else:
                if prefix == '':
                    query_string += f'{key}={value}&'
                else:
                    query_string += f'{prefix}[{key}]={value}&'
                    
    elif isinstance(obj, list):
        for index, value in enumerate(obj):
            if isinstance(value, dict) or isinstance(value, list):
                new_prefix = f'{prefix}[{index}]'
                query_string += generate_query_string(value, new_prefix)
            else:
                query_string += f'{prefix}[{index}]={value}&'
    
    return query_string

# 示例对象
obj = {
    'name': 'John Doe',
    'age': 30,
    'address': {
        'street': '123 Main St',
        'city': 'New York',
        'state': 'NY'
    },
    'hobbies': ['reading', 'painting', 'coding']
}

# 生成查询字符串
query_string = generate_query_string(obj)

# 去除末尾的'&'
if query_string.endswith('&'):
    query_string = query_string[:-1]

print(query_string)

name=John Doe&age=30&address[street]=123 Main St&address[city]=New York&address[state]=NY&hobbies[0]=reading&hobbies[1]=painting&hobbies[2]=coding