python - 我总是收到在分配之前引用局部变量的错误!我该如何解决？

Question

感谢您抽出宝贵的时间来帮助我。我在django中编写了一个Web抓取API，但在过去5天中遇到了可怕的错误!奇怪的是，在macOS上绝对没有错误，当我部署到AWS时，它向我抛出了变量引用错误! ubuntu具有python 3.6.8，而macOS具有python 3.6.6

我已经尝试过不同的方法，但是现在我想不起来了!应该返回的抓取数据在macOS上可以正常返回，但是在ubuntu上我被压碎了!请帮忙!

data_list = []
div_class = scrape_driver_2.find(class_ = 'c1_t2i')
daraz_products = scrape_driver.find_all(class_ = 'c2prKC')

for data_fragment in daraz_products: # iterate and find all classes 
    data_block = data_fragment.text.strip()  # Convert code to text
    formatted_block = data_block.replace('ADD TO CART', '')

    second_iterated_block = formatted_block.replace('%', '')
    third_iterated_block = second_iterated_block.replace(')Pakistan', ')-Pakistan')

    fourth_iterated_block = third_iterated_block.replace('Pakistan', '-Pakistan')

    data_list.append(fourth_iterated_block)
    high_data = [{"Timestamp": time_stamp,
                  "TS Token": ts_token,
                  "Status": sitrep},
                  data_list] 

return Response({"data": high_data})
engine_initializer.close()

我得到的错误是:
/api/big-budget-filter/中的UnboundLocalError
分配前已引用局部变量“high_data”

Answer 1

将high_data保留在循环之外，并在所有迭代之后进行设置，然后再返回。

data_list = []
div_class = scrape_driver_2.find(class_ = 'c1_t2i')
daraz_products = scrape_driver.find_all(class_ = 'c2prKC')

for data_fragment in daraz_products: # iterate and find all classes 
    data_block = data_fragment.text.strip()  # Convert code to text
    formatted_block = data_block.replace('ADD TO CART', '')

    second_iterated_block = formatted_block.replace('%', '')
    third_iterated_block = second_iterated_block.replace(')Pakistan', ')-Pakistan')

    fourth_iterated_block = third_iterated_block.replace('Pakistan', '-Pakistan')

    data_list.append(fourth_iterated_block)



high_data = [{"Timestamp": time_stamp,
                  "TS Token": ts_token,
                  "Status": sitrep},
                  data_list] 

return Response({"data": high_data})

编辑:根据这篇文章的评论，带有虚拟数据的简化示例版本

data_list = []

daraz_products = ["prod1","prod2","prod3"]

for data_fragment in daraz_products:
     data_list.append(data_fragment)

print data_list

data_list将包含daraz_products中的所有产品