转换为dataframe时保持Scrapy found字典的排序

from collections import OrderedDict
import pandas as pd

class MySpider(scrapy.Spider):
    name = 'my_spider'
    
    def __init__(self):
        self.found = OrderedDict()
    
    def parse(self, response):
        # 在爬虫中获取数据并存储到有序字典中
        self.found['key1'] = 'value1'
        self.found['key2'] = 'value2'
        self.found['key3'] = 'value3'
        
        # 将有序字典转换为DataFrame并保持排序
        df = pd.DataFrame.from_dict(self.found, orient='index', columns=['value'])
        df = df.reset_index().rename(columns={'index': 'key'})
        
        # 打印DataFrame
        print(df)