在 if 循环之后不打印语句

Question

from bs4 import BeautifulSoup
import numpy as np
import requests 
from selenium import webdriver
from nltk.tokenize import sent_tokenize,word_tokenize
print('ansife')
# html = requests.get('https://www.opentable.com/new-york-restaurant-listings')
# driver = webdriver.Firefox(,executable_path=r'[Your path]\geckodriver.exe')
html = webdriver.Firefox(executable_path=r'D:\geckodriver.exe')
html.get("https://www.opentable.com/new-york-restaurant-listings")
counter = 0
lists = []
def parser_NYU(html):

    global counter,lists
    total_hotels_more_than_60_bookings = 0
    soup = BeautifulSoup(html.page_source,'lxml')
    for i, restroom in enumerate(soup.find_all('div',class_='rest-row-info')):
        rest_name = restroom.find('span',class_='rest-row-name-text').text
        booking = restroom.find('div',class_='booking')  #.text
        words = list(word_tokenize(str(booking.text)))
        #same day

        if int(words[1]) > 100:
            print(booking.text)
            lists.extend([booking.text])

        print('listers',len(lists))
        print('this works fine')
        print('this works fine')    

    print('listers',len(lists))
    print('unfortunately this not works,why?')
    print('unfortunately this not works,why?')      

        
parser_NYU(html)

As you can see my print statements are not working after the if loop. that is:

    print('listers',len(lists))
    print('this is not printing')  # not printing 
    print('this is not printing')

what did i messed up here? what will be the main reason behind breaking the entire function after that if loop? please help me, and advance thanks!

Answer 1

If you mean to print the statements inside the if-condition (not if-loop) add the statements with proper indentation ie under the scope of if-condition.

    for i, restroom in enumerate(soup.find_all('div',class_='rest-row-info')):
        rest_name = restroom.find('span',class_='rest-row-name-text').text
        booking = restroom.find('div',class_='booking')  #.text
        words = list(word_tokenize(str(booking.text)))
        #same day

        if int(words[1]) > 100:
#-----------Scope of if-block starts here--------#
            print(booking.text)
            lists.extend([booking.text])

            print('listers',len(lists))
            print('this is not printing')  # not printing 
            print('this is not printing')
#-----------Scope of if-block ends here--------#

If you mean to print it inside the for-loop and not if-condition, place the print statements under the scope of for-loop

    for i, restroom in enumerate(soup.find_all('div',class_='rest-row-info')):
#-------Scope of for-block starts here--------#
        rest_name = restroom.find('span',class_='rest-row-name-text').text
        booking = restroom.find('div',class_='booking')  #.text
        words = list(word_tokenize(str(booking.text)))
        #same day

        if int(words[1]) > 100:

            print(booking.text)
            lists.extend([booking.text])

        print('listers',len(lists))
        print('this is not printing')  # not printing 
        print('this is not printing')
#-------Scope of for-block endshere--------#

Answer 2

The problem here is two fault:

• The actual issues is that at some point booking.text fails because bs4 does not find a div with class=booking , so it returns None , which does not have the attribute .text , so an excpeion is thorwn. Just check if find returned None :

        rest_name = restroom.find('span',class_='rest-row-name-text').text
        booking = restroom.find('div',class_='booking')
        if booking is None:
            continue
        words = list(word_tokenize(str(booking.text)))

(best also do that for rest_name )

• The reason you are not seeing the error message is because it is hidden behind the wall of prints you are doing in the loop. Those are buffered, and might happen at a latter point, eg at application exit. However at application exit, the error message has already been printed (unbufferd) and the prints afterward hide them. Always check for errors.