使用 BeautifulSoup 抓取 Tripadvisor 评论时出现 ValueError
ValueError when scraping Tripadvisor for reviews with BeautifulSoup
作为一个新手，我正在尝试抓取一些 Tripadvisor 评论。
我正在使用来自 Susanli2016 的代码。
它对一个 link but it doesn't work for any more link (for example 有效（虽然删除了属性 "language"）。）
我收到错误消息：
Traceback (most recent call last):
File "<pyshell#37>", line 4, in <module>
items = scrape(url)
File "<pyshell#13>", line 11, in scrape
items = parse(session, url + '?filterLang=' + lang)
File "<pyshell#18>", line 15, in parse
num_reviews = int(num_reviews) # convert text into integer
ValueError: invalid literal for int() with base 10: '5.695'
（其中 5,695 是页面中的评论数）
我在此处附上代码，以防有人可以帮助我。
非常感谢！
西尔维娅
--
特此完整代码：
import requests
from bs4 import BeautifulSoup
import csv
import webbrowser
import io
def display(content, filename='output.html'):
with open(filename, 'wb') as f:
f.write(content)
webbrowser.open(filename)
def get_soup(session, url, show=False):
r = session.get(url)
if show:
display(r.content, 'temp.html')
if r.status_code != 200: # not OK
print('[get_soup] status code:', r.status_code)
else:
return BeautifulSoup(r.text, 'html.parser')
def post_soup(session, url, params, show=False):
'''Read HTML from server and convert to Soup'''
r = session.post(url, data=params)
if show:
display(r.content, 'temp.html')
if r.status_code != 200: # not OK
print('[post_soup] status code:', r.status_code)
else:
return BeautifulSoup(r.text, 'html.parser')
def scrape(url, lang='ALL'):
# create session to keep all cookies (etc.) between requests
session = requests.Session()
session.headers.update({
'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0',
})
items = parse(session, url + '?filterLang=' + lang)
return items
def parse(session, url):
'''Get number of reviews and start getting subpages with reviews'''
print('[parse] url:', url)
soup = get_soup(session, url)
if not soup:
print('[parse] no soup:', url)
return
num_reviews = soup.find('span', class_='reviews_header_count').text # get text
num_reviews = num_reviews[1:-1]
num_reviews = num_reviews.replace(',', '')
num_reviews = int(num_reviews) # convert text into integer
print('[parse] num_reviews ALL:', num_reviews)
url_template = url.replace('.html', '-or{}.html')
print('[parse] url_template:', url_template)
items = []
offset = 0
while(True):
subpage_url = url_template.format(offset)
subpage_items = parse_reviews(session, subpage_url)
if not subpage_items:
break
items += subpage_items
if len(subpage_items) < 5:
break
offset += 5
return items
def get_reviews_ids(soup):
items = soup.find_all('div', attrs={'data-reviewid': True})
if items:
reviews_ids = [x.attrs['data-reviewid'] for x in items][::2]
print('[get_reviews_ids] data-reviewid:', reviews_ids)
return reviews_ids
def get_more(session, reviews_ids):
url = 'https://www.tripadvisor.com/OverlayWidgetAjax?Mode=EXPANDED_HOTEL_REVIEWS_RESP&metaReferer=Hotel_Review'
payload = {
'reviews': ','.join(reviews_ids), # ie. "577882734,577547902,577300887",
#'contextChoice': 'DETAIL_HR', # ???
'widgetChoice': 'EXPANDED_HOTEL_REVIEW_HSX', # ???
'haveJses': 'earlyRequireDefine,amdearly,global_error,long_lived_global,apg-Hotel_Review,apg-Hotel_Review-in,bootstrap,desktop-rooms-guests-dust-en_US,responsive-calendar-templates-dust-en_US,taevents',
'haveCsses': 'apg-Hotel_Review-in',
'Action': 'install',
}
soup = post_soup(session, url, payload)
return soup
def parse_reviews(session, url):
'''Get all reviews from one page'''
print('[parse_reviews] url:', url)
soup = get_soup(session, url)
if not soup:
print('[parse_reviews] no soup:', url)
return
hotel_name = soup.find('h1', id='HEADING').text
reviews_ids = get_reviews_ids(soup)
if not reviews_ids:
return
soup = get_more(session, reviews_ids)
if not soup:
print('[parse_reviews] no soup:', url)
return
items = []
for idx, review in enumerate(soup.find_all('div', class_='reviewSelector')):
badgets = review.find_all('span', class_='badgetext')
if len(badgets) > 0:
contributions = badgets[0].text
else:
contributions = '0'
if len(badgets) > 1:
helpful_vote = badgets[1].text
else:
helpful_vote = '0'
user_loc = review.select_one('div.userLoc strong')
if user_loc:
user_loc = user_loc.text
else:
user_loc = ''
bubble_rating = review.select_one('span.ui_bubble_rating')['class']
bubble_rating = bubble_rating[1].split('_')[-1]
item = {
'review_body': review.find('p', class_='partial_entry').text,
'review_date': review.find('span', class_='ratingDate')['title'], # 'ratingDate' instead of 'relativeDate'
}
items.append(item)
print('\n--- review ---\n')
for key,val in item.items():
print(' ', key, ':', val)
print()
return items
def write_in_csv(items, filename='results.csv',
headers=['hotel name', 'review title', 'review body',
'review date', 'contributions', 'helpful vote',
'user name' , 'user location', 'rating'],
mode='w'):
print('--- CSV ---')
with io.open(filename, mode, encoding="utf-8") as csvfile:
csv_file = csv.DictWriter(csvfile, headers)
if mode == 'w':
csv_file.writeheader()
csv_file.writerows(items)
DB_COLUMN = 'review_body'
DB_COLUMN1 = 'review_date'
start_urls = [
'https://www.tripadvisor.com/Restaurant_Review-g187823-d2101904-Reviews-Eataly_Genova-Genoa_Italian_Riviera_Liguria.html',
]
headers = [
DB_COLUMN,
DB_COLUMN1,
]
lang = 'it'
for url in start_urls:
# get all reviews for 'url' and 'lang'
items = scrape(url)
if not items:
print('No reviews')
else:
# write in CSV
filename = url.split('Reviews-')[1][:-5]
print('filename:', filename)
write_in_csv(items, filename + '.csv', headers, mode='w')
感谢所有评论者。我意识到问题在于意大利和美国编写千位分隔符的范式（我们使用“.”，而美国人使用“,”）。
在尝试使用 num_reviews = int(num_reviews).
将其类型转换为 int 之前，您似乎有以下观看次数字符串 5.695
可能 5.695 中的 . 是千位分隔符。
所以在使用 int() 之前像这样删除 .:
num_reviews = num_reviews.replace('.', '')
num_reviews = int(num_reviews)
错误是由于您尝试转换的 int 中的句号引起的。为确保它适用于所有打字格式，您只需要在转换为 int 之前过滤数字字符：
num_reviews = soup.find('span', class_='reviews_header_count').text # get text
num_reviews = num_reviews[1:-1]
num_reviews = num_reviews.replace(',', '').replace('.','')
num_reviews = int(num_reviews)
或更通用的方式，仅在字符串中包含数字字符 num_reviews
你不能被直接解析为整数值，在这种情况下你先将它转换为float然后如果你想将它转换为Int。
num_reviews = int(float(num_reviews))
作为一个新手，我正在尝试抓取一些 Tripadvisor 评论。
我正在使用来自 Susanli2016 的代码。
它对一个 link but it doesn't work for any more link (for example 有效（虽然删除了属性 "language"）。）
我收到错误消息：
Traceback (most recent call last):
File "<pyshell#37>", line 4, in <module>
items = scrape(url)
File "<pyshell#13>", line 11, in scrape
items = parse(session, url + '?filterLang=' + lang)
File "<pyshell#18>", line 15, in parse
num_reviews = int(num_reviews) # convert text into integer
ValueError: invalid literal for int() with base 10: '5.695'
（其中 5,695 是页面中的评论数）
我在此处附上代码，以防有人可以帮助我。
非常感谢！ 西尔维娅
--
特此完整代码：
import requests
from bs4 import BeautifulSoup
import csv
import webbrowser
import io
def display(content, filename='output.html'):
with open(filename, 'wb') as f:
f.write(content)
webbrowser.open(filename)
def get_soup(session, url, show=False):
r = session.get(url)
if show:
display(r.content, 'temp.html')
if r.status_code != 200: # not OK
print('[get_soup] status code:', r.status_code)
else:
return BeautifulSoup(r.text, 'html.parser')
def post_soup(session, url, params, show=False):
'''Read HTML from server and convert to Soup'''
r = session.post(url, data=params)
if show:
display(r.content, 'temp.html')
if r.status_code != 200: # not OK
print('[post_soup] status code:', r.status_code)
else:
return BeautifulSoup(r.text, 'html.parser')
def scrape(url, lang='ALL'):
# create session to keep all cookies (etc.) between requests
session = requests.Session()
session.headers.update({
'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0',
})
items = parse(session, url + '?filterLang=' + lang)
return items
def parse(session, url):
'''Get number of reviews and start getting subpages with reviews'''
print('[parse] url:', url)
soup = get_soup(session, url)
if not soup:
print('[parse] no soup:', url)
return
num_reviews = soup.find('span', class_='reviews_header_count').text # get text
num_reviews = num_reviews[1:-1]
num_reviews = num_reviews.replace(',', '')
num_reviews = int(num_reviews) # convert text into integer
print('[parse] num_reviews ALL:', num_reviews)
url_template = url.replace('.html', '-or{}.html')
print('[parse] url_template:', url_template)
items = []
offset = 0
while(True):
subpage_url = url_template.format(offset)
subpage_items = parse_reviews(session, subpage_url)
if not subpage_items:
break
items += subpage_items
if len(subpage_items) < 5:
break
offset += 5
return items
def get_reviews_ids(soup):
items = soup.find_all('div', attrs={'data-reviewid': True})
if items:
reviews_ids = [x.attrs['data-reviewid'] for x in items][::2]
print('[get_reviews_ids] data-reviewid:', reviews_ids)
return reviews_ids
def get_more(session, reviews_ids):
url = 'https://www.tripadvisor.com/OverlayWidgetAjax?Mode=EXPANDED_HOTEL_REVIEWS_RESP&metaReferer=Hotel_Review'
payload = {
'reviews': ','.join(reviews_ids), # ie. "577882734,577547902,577300887",
#'contextChoice': 'DETAIL_HR', # ???
'widgetChoice': 'EXPANDED_HOTEL_REVIEW_HSX', # ???
'haveJses': 'earlyRequireDefine,amdearly,global_error,long_lived_global,apg-Hotel_Review,apg-Hotel_Review-in,bootstrap,desktop-rooms-guests-dust-en_US,responsive-calendar-templates-dust-en_US,taevents',
'haveCsses': 'apg-Hotel_Review-in',
'Action': 'install',
}
soup = post_soup(session, url, payload)
return soup
def parse_reviews(session, url):
'''Get all reviews from one page'''
print('[parse_reviews] url:', url)
soup = get_soup(session, url)
if not soup:
print('[parse_reviews] no soup:', url)
return
hotel_name = soup.find('h1', id='HEADING').text
reviews_ids = get_reviews_ids(soup)
if not reviews_ids:
return
soup = get_more(session, reviews_ids)
if not soup:
print('[parse_reviews] no soup:', url)
return
items = []
for idx, review in enumerate(soup.find_all('div', class_='reviewSelector')):
badgets = review.find_all('span', class_='badgetext')
if len(badgets) > 0:
contributions = badgets[0].text
else:
contributions = '0'
if len(badgets) > 1:
helpful_vote = badgets[1].text
else:
helpful_vote = '0'
user_loc = review.select_one('div.userLoc strong')
if user_loc:
user_loc = user_loc.text
else:
user_loc = ''
bubble_rating = review.select_one('span.ui_bubble_rating')['class']
bubble_rating = bubble_rating[1].split('_')[-1]
item = {
'review_body': review.find('p', class_='partial_entry').text,
'review_date': review.find('span', class_='ratingDate')['title'], # 'ratingDate' instead of 'relativeDate'
}
items.append(item)
print('\n--- review ---\n')
for key,val in item.items():
print(' ', key, ':', val)
print()
return items
def write_in_csv(items, filename='results.csv',
headers=['hotel name', 'review title', 'review body',
'review date', 'contributions', 'helpful vote',
'user name' , 'user location', 'rating'],
mode='w'):
print('--- CSV ---')
with io.open(filename, mode, encoding="utf-8") as csvfile:
csv_file = csv.DictWriter(csvfile, headers)
if mode == 'w':
csv_file.writeheader()
csv_file.writerows(items)
DB_COLUMN = 'review_body'
DB_COLUMN1 = 'review_date'
start_urls = [
'https://www.tripadvisor.com/Restaurant_Review-g187823-d2101904-Reviews-Eataly_Genova-Genoa_Italian_Riviera_Liguria.html',
]
headers = [
DB_COLUMN,
DB_COLUMN1,
]
lang = 'it'
for url in start_urls:
# get all reviews for 'url' and 'lang'
items = scrape(url)
if not items:
print('No reviews')
else:
# write in CSV
filename = url.split('Reviews-')[1][:-5]
print('filename:', filename)
write_in_csv(items, filename + '.csv', headers, mode='w')
感谢所有评论者。我意识到问题在于意大利和美国编写千位分隔符的范式（我们使用“.”，而美国人使用“,”）。
在尝试使用 num_reviews = int(num_reviews).
5.695
可能 5.695 中的 . 是千位分隔符。
所以在使用 int() 之前像这样删除 .:
num_reviews = num_reviews.replace('.', '')
num_reviews = int(num_reviews)
错误是由于您尝试转换的 int 中的句号引起的。为确保它适用于所有打字格式，您只需要在转换为 int 之前过滤数字字符：
num_reviews = soup.find('span', class_='reviews_header_count').text # get text
num_reviews = num_reviews[1:-1]
num_reviews = num_reviews.replace(',', '').replace('.','')
num_reviews = int(num_reviews)
或更通用的方式，仅在字符串中包含数字字符 num_reviews
你不能被直接解析为整数值，在这种情况下你先将它转换为float然后如果你想将它转换为Int。
num_reviews = int(float(num_reviews))