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 Error after a few minutes of running
#1
Error:
Fatal Python error: Cannot recover from stack overflow. Python runtime state: initialized Current thread 0x000019e8 (most recent call first): File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\utils.py", line 57 in _has_surrogates File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\_policybase.py", line 287 in _sanitize_header File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\_policybase.py", line 316 in header_fetch_parse File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\message.py", line 471 in get File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\message.py", line 578 in get_content_type File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\message.py", line 594 in get_content_maintype File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\feedparser.py", line 295 in _parsegen File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\feedparser.py", line 180 in _call_parse File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\feedparser.py", line 176 in feed File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\parser.py", line 56 in parse File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\email\parser.py", line 67 in parsestr File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\http\client.py", line 221 in parse_headers File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\http\client.py", line 327 in begin File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\http\client.py", line 1322 in getresponse File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\urllib3\connectionpool.py", line 416 in _make_request File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\urllib3\connectionpool.py", line 665 in urlopen File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\urllib3\poolmanager.py", line 330 in urlopen File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\urllib3\request.py", line 171 in request_encode_body File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\urllib3\request.py", line 79 in request File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 397 in _request File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 374 in execute File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 319 in execute File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 976 in find_element File "C:\Users\Julius\AppData\Local\Programs\Python\Python38-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 598 in find_element_by_css_selector File "C:\Users\Julius\Desktop\test\Klad2.py", line 51 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart File "C:\Users\Julius\Desktop\test\Klad2.py", line 58 in trycart
So I've created this piece of code where it monitors the website of https://www.Jdsports.nl. My script refreshes the website and checks if the sneakers are in stock, it repeats this for as long as possible. As I said, this script works perfectly until it has refreshed the site for about 1500 times (if my maths are correct :)). After 1500 times it gives the error above^^^^. I'm running my code with headless selenium. Does anyone know why I get that error??
Quote
#2
The error traceback shows a high level of recursion. Try to break the recursivity of the algorithm.
Quote
#3
I suspect you want this (it's probably not worth changing your algorithm). If you do need to change your algorithm, I suspect you'll need to manage a stack manually.
Feel like you're not getting the answers you want? Checkout the help/rules for things like what to include/not include in a post, how to use code tags, how to ask smart questions, and more.

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Quote
#4
(Feb-05-2020, 08:18 PM)micseydel Wrote: The error traceback shows a high level of recursion. Try to break the recursivity of the algorithm.
I tried to add the line:
sys.setrecursionlimit(10000)
But nothing really changed :O.

(Feb-05-2020, 07:52 PM)Gribouillis Wrote: The error traceback shows a high level of recursion. Try to break the recursivity of the algorithm.
I'm sorry I'm a little bit of a noob but I don't understand what you mean and how to solve it oeps :O
Quote
#5
julio2000 Wrote:My script refreshes the website and checks if the sneakers are in stock, it repeats this for as long as possible
This task does not normally need a high level of recursion. It means that you are repeating the task by the means of recursion instead of repeating it by an infinite loop. The structure of the program should be
while True:
    refresh_the_website()
    check_if_the_sneakers_are_in_stock()
None of these functions should call itself, directly or indirectly.
Quote
#6
(Feb-05-2020, 09:35 PM)Gribouillis Wrote: The structure of the program should be
If they're performing a depth-first search, then recursion is a very natural solution, and a simple loop won't be enough without them managing a stack manually, which isn't necessarily worth doing...

That said, it sounds like there's no base-case. Usually for a recursive web crawler like this, you'd specify a max depth.

You should probably share your code if you expect more help.
Feel like you're not getting the answers you want? Checkout the help/rules for things like what to include/not include in a post, how to use code tags, how to ask smart questions, and more.

Pro-tip - there's an inverse correlation between the number of lines of code posted and my enthusiasm for helping with a question :)
Quote
#7
(Feb-05-2020, 09:35 PM)Gribouillis Wrote:
julio2000 Wrote:My script refreshes the website and checks if the sneakers are in stock, it repeats this for as long as possible
This task does not normally need a high level of recursion. It means that you are repeating the task by the means of recursion instead of repeating it by an infinite loop. The structure of the program should be
while True:
    refresh_the_website()
    check_if_the_sneakers_are_in_stock()
None of these functions should call itself, directly or indirectly.
and how do I say when it needs to be False?
Quote
#8
As @micseydel said, we know too little to give a valuable help.

From the traceback, we can see that the error occured during the call of a function named find_element_by_css_selector(). Again I cannot imagine such a function involving a high level of recursion without an error in the logic of the program. Typically, a function with that name will traverse a document's tree which depth is small.
Quote
#9
(Feb-05-2020, 09:51 PM)Gribouillis Wrote: As @micseydel said, we know too little to give a valuable help.

From the traceback, we can see that the error occured during the call of a function named find_element_by_css_selector(). Again I cannot imagine such a function involving a high level of recursion without an error in the logic of the program. Typically, a function with that name will traverse a document's tree which depth is small.
my script is kind of as following:
def Trycart():
    try:
        check if it's instock
    except Exception:      <- when it's out of stock it will give an Exception
        Trycart            <- so when it's out of stock it will try this function again
It is a bit more complicated then this^^ but this kind of sums it up. So I'm not using a while loop but I'm constantly repeating the function. Could this b the problem?
Quote
#10
Yes I do think it could be the problem. You could replace this for example with
while True:
    try:
        check if it's in stock
    except Exception:
        continue
    else:
        break
Quote

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