NameError: name 'u1' is not defined (on parser code Python)

[Melcu54]

hello. I test a code, and it's not working:

from bs4 import BeautifulSoup import bs4 import requests import os import re def getHTMLText(url):	try:	headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36'}	r = requests.get(url, headers=headers)	r.raise_for_status()	r.encoding = r.apparent_encoding	return r.text	except:	return "NO" def main(): for i in range(100): url = 'https://movie.douban.com/subject/30362186/comments?start' url = url +str(20*i) html = getHTMLText(url) soup = BeautifulSoup(html, 'html.parser') for new in soup.select('.comments'): for b in new.select('a'): u1=b.text for c in new.select('.short'): u2=c.text print(u1+u2) main()

Error:
Traceback (most recent call last): File "C:\Folder2\html parser.py", line 32, in <module> print(u1+u2) NameError: name 'u1' is not defined

[snippsat]

Most have print() in main() function.
There are serval other problem if i do a test,u1,u2 will have no output.
select('.comments') don't find anything the selectors has to more specific.
Loop for just give same page,just some fixes to get some output.

from bs4 import BeautifulSoup import bs4 import requests import os import re def getHTMLText(url): try: headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36" } r = requests.get(url, headers=headers) r.raise_for_status() #r.encoding = r.apparent_encoding return r.content # No text let bs4 handle it except: return "NO" def main(): for i in range(2): url = "https://movie.douban.com/subject/30362186/comments?start" url = url + str(20 * i) #print(url) html = getHTMLText(url) soup = BeautifulSoup(html, "html.parser") print(soup.select('#comments > div:nth-child(1) > div.comment')) '''for new in soup.select(".comments"): for b in new.select("a"): u1 = b.text for c in new.select(".short"): u2 = c.text print(u1 + u2)''' main()

So the url generate,this for me just point to same page

https://movie.douban.com/subject/30362186/comments?start0 https://movie.douban.com/subject/30362186/comments?start20

A common mistake is to make loop or other stuff before has tested that stuff actually work on one page.
Then small step test next page and short loop,not 100 pages🌊