我正在尝试刮除每个评论者给产品的星数。我注意到一些评论者是"Vine Voices"或付费评论者。他们很少给 4 星,主要是 5 星。因此,我想排除它们。
我这样做的方法是将它们标记为"付费">或"未付费",如果评论标记为"a-color-success a-text-bold"标签。
我似乎无法将任何"付费"标签附加到藤蔓变量中。怎么来了?
只有那些由 Vine Voice 撰写的评论才有标签,那些没有标签的评论没有"付费"标签。
import requests
from bs4 import BeautifulSoup
import pandas as pd
import time
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36'}
rating_list = []
date_list = []
vine = []
for num in range(1,12):
url = "https://www.amazon.com/Jabra-Wireless-Noise-Canceling-Headphones-Built/product-reviews/B07RS8B5HV/ref=cm_cr_arp_d_paging_btm_next_2?ie=UTF8&reviewerType=all_reviews&pageNumber={}&sortBy=recent".format(num)
r = requests.get(url, headers = headers)
soup = BeautifulSoup(r.content, 'lxml')
for ratings in soup.find_all("div", attrs={"data-hook": "review"}):
submission_date = ratings.find("span", {'data-hook':'review-date'}).text
rating = ratings.find('i', attrs={"data-hook": "review-star-rating"}).text
paid = ratings.find("span", attrs={"class": "a-color-success a-text-bold"})
if paid in ratings:
vine.append("Paid")
else:
vine.append("Not-paid")
date_list.append(submission_date)
rating_list.append(rating)
data = {'Rating':rating_list, 'Date':date_list, "Paid":vine}
time.sleep(2)
df = pd.DataFrame(data)
df["Date"] = pd.to_datetime(df["Date"])
df = df.sort_values(by="Date", ascending=False)
print(df)
这就是我到目前为止得到的。 评论 2 和 3 是 Vine Voice,但它们被标记为未付费,但应该付费。
0 5.0 out of 5 stars 2019-09-18 Not-paid
1 4.0 out of 5 stars 2019-09-13 Not-paid
2 5.0 out of 5 stars 2019-09-12 Not-paid
3 5.0 out of 5 stars 2019-09-11 Not-paid
4 5.0 out of 5 stars 2019-09-10 Not-paid
...
您将元素与元素进行比较,这就是为什么它总是进入 else 条件的原因。 我已经进行了更改并将文本与文本进行了比较,它工作正常。检查下面的代码。
import requests
from bs4 import BeautifulSoup
import pandas as pd
import time
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36'}
rating_list = []
date_list = []
vine = []
for num in range(1,12):
url = "https://www.amazon.com/Jabra-Wireless-Noise-Canceling-Headphones-Built/product-reviews/B07RS8B5HV/ref=cm_cr_arp_d_paging_btm_next_2?ie=UTF8&reviewerType=all_reviews&pageNumber={}&sortBy=recent".format(num)
r = requests.get(url, headers = headers)
soup = BeautifulSoup(r.content, 'lxml')
for ratings in soup.find_all("div", attrs={"data-hook": "review"}):
submission_date = ratings.find("span", {'data-hook':'review-date'}).text
rating = ratings.find('i', attrs={"data-hook": "review-star-rating"}).text
paid = ratings.find("span", attrs={"class": "a-color-success a-text-bold"})
if paid:
if paid.text in ratings.text:
vine.append("Paid")
date_list.append(submission_date)
rating_list.append(rating)
data = {'Rating': rating_list, 'Date': date_list, "Paid": vine}
else:
vine.append("Not-paid")
date_list.append(submission_date)
rating_list.append(rating)
data = {'Rating':rating_list, 'Date':date_list, "Paid":vine}
time.sleep(2)
df = pd.DataFrame(data)
df["Date"] = pd.to_datetime(df["Date"])
df = df.sort_values(by="Date", ascending=False)
print(df)
输出:
Date Paid Rating
0 2019-09-18 Not-paid 5.0 out of 5 stars
1 2019-09-13 Not-paid 4.0 out of 5 stars
2 2019-09-12 Paid 5.0 out of 5 stars
3 2019-09-11 Paid 5.0 out of 5 stars
4 2019-09-10 Not-paid 5.0 out of 5 stars
5 2019-09-10 Not-paid 2.0 out of 5 stars
6 2019-09-10 Paid 5.0 out of 5 stars
7 2019-09-09 Paid 5.0 out of 5 stars
8 2019-09-09 Not-paid 2.0 out of 5 stars
9 2019-09-08 Paid 5.0 out of 5 stars
10 2019-09-05 Paid 5.0 out of 5 stars
11 2019-09-01 Not-paid 2.0 out of 5 stars
12 2019-08-31 Paid 5.0 out of 5 stars
13 2019-08-25 Paid 5.0 out of 5 stars
14 2019-08-24 Not-paid 4.0 out of 5 stars
15 2019-08-22 Not-paid 5.0 out of 5 stars
16 2019-08-21 Paid 5.0 out of 5 stars
17 2019-08-20 Not-paid 5.0 out of 5 stars
18 2019-08-20 Paid 5.0 out of 5 stars
19 2019-08-18 Paid 5.0 out of 5 stars
20 2019-08-17 Not-paid 5.0 out of 5 stars
21 2019-08-17 Not-paid 5.0 out of 5 stars
22 2019-08-14 Not-paid 4.0 out of 5 stars
23 2019-08-12 Paid 5.0 out of 5 stars
24 2019-08-05 Paid 5.0 out of 5 stars
25 2019-08-05 Paid 4.0 out of 5 stars
26 2019-08-04 Paid 5.0 out of 5 stars
27 2019-08-04 Paid 4.0 out of 5 stars
29 2019-08-03 Paid 5.0 out of 5 stars
28 2019-08-03 Paid 4.0 out of 5 stars
.. ... ... ...
80 2019-07-08 Paid 5.0 out of 5 stars
81 2019-07-08 Paid 5.0 out of 5 stars
82 2019-07-08 Paid 5.0 out of 5 stars
85 2019-07-07 Paid 5.0 out of 5 stars
83 2019-07-07 Paid 5.0 out of 5 stars
84 2019-07-07 Paid 5.0 out of 5 stars
87 2019-07-06 Paid 5.0 out of 5 stars
86 2019-07-06 Paid 4.0 out of 5 stars
88 2019-07-05 Not-paid 4.0 out of 5 stars
89 2019-07-05 Paid 5.0 out of 5 stars
90 2019-07-05 Paid 5.0 out of 5 stars
91 2019-07-05 Paid 5.0 out of 5 stars
92 2019-07-04 Paid 5.0 out of 5 stars
93 2019-07-04 Paid 4.0 out of 5 stars
94 2019-07-04 Paid 5.0 out of 5 stars
95 2019-07-04 Paid 5.0 out of 5 stars
96 2019-07-04 Paid 5.0 out of 5 stars
98 2019-07-03 Not-paid 3.0 out of 5 stars
97 2019-07-03 Paid 5.0 out of 5 stars
99 2019-07-01 Paid 5.0 out of 5 stars
100 2019-07-01 Paid 3.0 out of 5 stars
101 2019-07-01 Paid 5.0 out of 5 stars
102 2019-06-30 Paid 5.0 out of 5 stars
103 2019-06-29 Paid 5.0 out of 5 stars
104 2019-06-29 Paid 5.0 out of 5 stars
105 2019-06-28 Not-paid 1.0 out of 5 stars
106 2019-06-27 Paid 4.0 out of 5 stars
107 2019-06-27 Paid 5.0 out of 5 stars
108 2019-06-26 Paid 5.0 out of 5 stars
109 2019-06-26 Paid 5.0 out of 5 stars
[110 rows x 3 columns]
我认为更好的方法(使用 bs4 4.7.1+(是使用 :has 和 :not 预先排除。然后,您不需要排除字段/标志。在下文中,我打印出审稿人姓名作为目视检查(您将看到付费审稿人姓名没有出现(。我还调整您的循环以正常工作并使用Session
提高效率。我还使用更短更强大的选择器。
css 选择器比find
快,所以我可能会find
行更改为:
submission_date = review.select_one('[data-hook=review-date]').text
rating = review.select_one('[data-hook=review-star-rating]').text
派
import requests
from bs4 import BeautifulSoup
import pandas as pd
headers = {'User-Agent': 'Mozilla/5.0'}
rating_list = []
date_list = []
with requests.Session() as s:
for num in range(1,12):
url = "https://www.amazon.com/Jabra-Wireless-Noise-Canceling-Headphones-Built/product-reviews/B07RS8B5HV/ref=cm_cr_arp_d_paging_btm_next_2?ie=UTF8&reviewerType=all_reviews&pageNumber={}&sortBy=recent".format(num)
r = s.get(url, headers = headers)
soup = BeautifulSoup(r.content, 'lxml')
for review in soup.select('.review:not(:has(.a-color-success))'):
submission_date = review.select_one('[data-hook=review-date]').text
rating = review.select_one('[data-hook=review-star-rating]').text
date_list.append(submission_date)
rating_list.append(rating)
print(review.select_one('.a-profile-name').text) #check
data = {'Rating':rating_list, 'Date':date_list}
df = pd.DataFrame(data)
df["Date"] = pd.to_datetime(df["Date"])
df = df.sort_values(by="Date", ascending=False)
print(df)