用方法调用python3类

Question

I have a file named: scrape.py This file contains the following class:

Im trying to call my class BrickSetSpider , with its methods, and ultimately return the value of parse_page_urls when running this program like python scrape.py .

However, when i run python scrape.py , I get:

NameError: name 'response' is not defined

on this line:

page = spider.parse_se_page_url(response)

Can someone help me run my two methods (outputting the result of g_result_list ?

Thank you so much!

Answer 1

A few thins:

• The reason you get the error of NameError: name 'response' is not defined is that no where in the scope of main you have defined any variable called response You can't use it without defining such a parameter.

• In addition in the parse_se_page_urls you have an extra line of

   def parse_se_page_urls(self, g_result_page): 

  without any implementation of the function. should also be problematic.

• Unless missing something that isn't in the code posted, in your second function you are using the g_result_page variable - but just as with response it is not defined. You have a parameter with the same name in the function above but it is a local variable of that function and thus unknown by the second one. To initialize them as members of the instance add a constructor as follows:

   def __init__(self): self.g_result_list = [] self.g_result_page = [] 

  and then for using write self.g_result_page

• In your first function you have the two following lines:

   set(g_result_page) list(g_result_page) 

  These lines have no effect - they create a set and a list out of g_result_page but these data structures are not assigned to anything and thus are cleared at the end of the function

Answer 2

There are two minor errors in your code.

First, when you get an instance of the class, you don't need to pass in anything, so your code becomes

spider = BrickSetSpider()

Secondly, you use the variable page to store the output of spider.parse_page_url(response) by doing page = spider.parse_page_url(response) , but you then call urls = page.parse_page_urls(result_page) . I believe what you meant to do was call urls = spider.parse_page_urls(page) .

Hope this helps.