🔒 accessing field of an object in list comprehension causes AttributeError.

[mortal epoch]

Following snippet

resp.raise_for_status()
soup = BeautifulSoup(resp.text, 'html.parser')
titles = [tr.find("a").text for tr in soup.find(class_="article-table").find_all("tr")[1:]]
``` causes ```
AttributeError                            Traceback (most recent call last)
Cell In[14], line 8
      6 resp.raise_for_status()
      7 soup = BeautifulSoup(resp.text, 'html.parser')
----> 8 titles = [getattr(tr.find("a"), 'text') for tr in soup.find(class_="article-table").find_all("tr")[1:]]
      9 titles

AttributeError: 'NoneType' object has no attribute 'text'
``` I assume that this is because type of tr.find() is not known at the time of evaluation. However, why would python of all language care about it? I mean, it diesnt need to know type to call .find method, and if tr would not have it then it will throw an error. Why is that different?

[wheat sparrow]

@mortal epoch

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[mortal epoch]

Clarification, the error message is not for the actual snippet. AFter getting the original error I tried using getattr as a proxy thinking that maybe a function call will be allowed

same error though

[lean thicket]

it actually does tell you what type it was at evaluation, NoneType, so tr.find("a") must have returned None

[mortal epoch]

But When i print the list it doesnt contain none

Oh, nevermind - you are right, somehow there is one None. Dumb me, i put too much trust into consistency of this html

?close

[lapis hound]

This is not a Modmail thread.

[mortal epoch]

?resolve

wait, how do i kill the thread?

[lean thicket]

o just use ! as the prefix

[mortal epoch]

!close

[wheat sparrow]

Python help channel closed

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