[Solved] Scrapy crawler function not executing

Found the issue, the problem was that because i was using extract() its output is a list, so i had a list within a list ( with only one element ) and the request wasn’t calling the url, changed it to a extract_first() and now it works. HierarchyItem[“hierarchy_url”] = lvl3.css(“a::attr(href)”).extract_first() solved Scrapy crawler function not … Read more

[Solved] scrapy/Python crawls but does not scrape data

Your imports didn’t work that well over here, but that might be a configuration issue on my side. I think the scraper below does what you’re searching for: import scrapy class YelpSpider(scrapy.Spider): name=”yelp_spider” allowed_domains=[“yelp.com”] headers=[‘venuename’,’services’,’address’,’phone’,’location’] def __init__(self): self.start_urls = [‘https://www.yelp.com/search?find_desc=&find_loc=Springfield%2C+IL&ns=1’] def start_requests(self): requests = [] for item in self.start_urls: requests.append(scrapy.Request(url=item, headers={‘Referer’:’http://www.google.com/’})) return requests def parse(self, … Read more

[Solved] trouble understanding this while loop [duplicate]

element is an index, not an element from myList. I would rename your current element variable to something like index and then add element = myList[index] at the top of your while loop: def splitList2(myList, option): nList = [] index = 0 while index < len(myList): element = myList[index] if option == 0: if abs(element) … Read more

[Solved] How function is getting called without defining in python [closed]

Make sure your code is exactly as it is now in the question (including the edit by @Haidro) The code, as you pasted it in the question, suggests your indentation was something like this: def my_function(): ”’ docstring ”’ code_intended_for_my_function() #my_function() This would cause code_intended_for_my_function to be executed. This is “valid” because the docstring makes … Read more

[Solved] How to create a strand count? [closed]

May be you want this: import re def rna_strand_count(test_string,sub_string): test_string = test_string.replace(‘ ‘,”).upper() sub_string = sub_string.replace(‘ ‘,”).upper() first = sub_string[0] second = sub_string[1:] return {sub_string:len(re.findall(r'{0}(?={1})’.format(first,second),test_string))} print rna_strand_count(‘AAAA’,’AA’) 1 solved How to create a strand count? [closed]

[Solved] Sort a list of integers basis the remainder they leave when divided by 5 in an ascending order? [closed]

Python’s sort() has the optional argument key. You can use a lambda function as the key like so: numbers = [1, 9, 35, 12, 13, 21, 10] numbers.sort(key=lambda i: i % 5) print(numbers) A quick explanation of what’s going on here: A lambda function is a function that is defined in-line and isn’t named. lambda … Read more