纸幅刮板工艺
纸幅刮板工艺
提问于 2021-07-23 16:14:12
我一直在尝试替换输出中的一些文本，但一直没有成功。
我希望输出结果如下所示
su-n-s-e-t
https://64.media.tumblr.com/35fb46ace19cf31bf16c3655eff26fa6/bc3cfd4a41299b1e-9a/s500x750/98bbd40e71066761a4bd5983896932dd56c94427.jpg
houndsofvalinor-art
https://64.media.tumblr.com/e89e2a223d965a0351e310c829389583/ce52b6a3e76c58be-6e/s500x750/43548527d68eac8def536a88901a2ff78355ef51.jpg
amazinglybeautifulphotography
https://64.media.tumblr.com/a7d31eb63666d39d10868debbab9e27c/5be73c7f5dadb3dd-aa/s500x750/5b10d9cc0400e7b0dbabb9ea14c37e6b91e85e91.jpg
kylebonallo
https://64.media.tumblr.com/b406c3ceb50e4e09e550710b35de1310/dddef868163205f7-71/s500x750/9fec23368ed8ca5d6effae89fbdcda54554d0a68.jpg
expressions-of-nature
https://64.media.tumblr.com/e1eb3612511e21177dfa66ac02f07b98/c5b5c1fc2cbbc58d-e1/s500x750/550dbdf7568167891c5ea1af18af9cbc91cd620f.jpg
ex0skeletal-undead
https://64.media.tumblr.com/14d837eb6159b8376443393d8b1ef551/fb5d595667e75d0f-79/s500x750/cee48e58e0b1191376e20fd11904c09adbea50b3.jpg
geopsych
https://64.media.tumblr.com/a596b92db62c8ae4f68b490d172f8227/c856f013961ced0e-10/s500x750/73fb838c8065174e5ede5d93698ea386e6df1efe.jpg
jacobvanloon
https://64.media.tumblr.com/ca5f1e13bb4642de55422e74611f1df6/6f85f80cb48e73f7-e4/s500x750/12b59223056baf7733d99f210f1cd8bc397d52cd.png
amazinglybeautifulphotography
https://64.media.tumblr.com/06a1ff4abc50e80df59ddbd6e9c8c42c/3fd49bbbfb9dffd8-df/s500x750/43d3adf64f6fec58ebd37633be4988f36746e819.jpg url_list变量返回：
geopsych
[' https://64.media.tumblr.com/a596b92db62c8ae4f68b490d172f8227/c856f013961ced0e-10/s500x750/73fb838c8065174e5ede5d93698ea386e6df1efe.jpg 500w']
burningmine
[' https://64.media.tumblr.com/e32b99ad1de8f8cd494205982c0137a1/54985812c55123d3-99/s500x750/cbe83b505eb14ff36e2be05e171a30bfd073a41b.jpg 500w']
amazinglybeautifulphotography
[' https://64.media.tumblr.com/06a1ff4abc50e80df59ddbd6e9c8c42c/3fd49bbbfb9dffd8-df/s500x750/43d3adf64f6fec58ebd37633be4988f36746e819.jpg 500w']这是我尝试过的：
for results in urls:
results.replace('500w','')但我还是在500w的结尾得到了它。
由于我想在没有['']的情况下在一行中获得每个链接，所以我尝试用.split('\n')而不是.split(',')来拆分它，但似乎我在使用它时也遇到了错误。
下面是代码的其余部分：
import requests
from bs4 import BeautifulSoup
search_term = 'landscape'
posts_scrape = requests.get(f'https://www.tumblr.com/search/{search_term}')
soup = BeautifulSoup(posts_scrape.text, 'html.parser')
articles = soup.find_all('article', class_='_2DpMA')
for article in articles:
try:
source = article.find('div', class_='_3QBiZ').text
urls = []
for imgvar in article.find_all('img', alt='Image'):
url_list = [i for i in imgvar['srcset'].split(',') if (i.find('500w') != -1)]
urls.append(url_list)
for results in urls:
results.replace('500w','')
print (source)
print (results)
except AttributeError:
continue回答 2
Stack Overflow用户
回答已采纳
发布于 2021-07-23 16:27:48
我建议使用字典来存储图像URLS。键是图像的源，值是图像URL的列表。例如：
import requests
from bs4 import BeautifulSoup
search_term = "landscape"
posts_scrape = requests.get(f"https://www.tumblr.com/search/{search_term}")
soup = BeautifulSoup(posts_scrape.text, "html.parser")
articles = soup.find_all("article", class_="_2DpMA")
data = {}
for article in articles:
try:
source = article.find("div", class_="_3QBiZ").text
for imgvar in article.find_all("img", alt="Image"):
data.setdefault(source, []).extend(
[
i.replace("500w", "").strip()
for i in imgvar["srcset"].split(",")
if "500w" in i
]
)
except AttributeError:
continue
for source, image_urls in data.items():
for url in image_urls:
print(source)
print(url)打印：
leahberman
https://64.media.tumblr.com/e29c3dd39ab0e413ff6eefa0cfc973de/d6817667d3007f74-09/s500x750/2971fc9af6619f1f783bb169b104dea023f339de.gifv
leahberman
https://64.media.tumblr.com/8c61e084290ccea6fef3eab1d96204fd/d6817667d3007f74-b8/s500x750/45873681924618d179bfc97e04a02d3d6ebaac39.gifv
leahberman
https://64.media.tumblr.com/c4db8bc21289aec008219f5a4b307714/d6817667d3007f74-85/s500x750/c49d38c369ccb507d950b116e637886ac4467685.gifv
poetry-siir
https://64.media.tumblr.com/5495c24e4608688a6a0052d81da01882/d97a76eeb3edd5e9-d7/s500x750/9862a63fe430e83850ceb73f384bf2af6322db5e.jpg
poetry-siir
https://64.media.tumblr.com/9944d7a5d2d26a57118c8b391b699efb/d97a76eeb3edd5e9-ad/s500x750/7cfc69a18143d5b2a678fe0c85c431e5387a2107.jpg
...and so on.Stack Overflow用户
发布于 2021-07-23 16:35:33
我认为问题主要存在于下面这行代码中：
results.replace('500w','')首先：results是一个list，所以它没有.replace()方法。如果您不让AttributeError静音，您就会看到这一点。您至少应该这样打印一个错误：
except AttributeError as exc:
print(exc)您将看到它输出了一个非常描述性的错误：'list' object has no attribute 'replace'
第二:我猜你想要替换results中的实际urls，去掉末尾的“500w”。Python中的字符串是不可变的，这意味着对str的任何转换都会创建一个新的str，而不是修改第一个字符串。因此，您在这里修改了一个str，创建了一个新的，但没有将其存储在任何地方。
第三:您的urls列表在for循环的每次迭代中都会被擦除。您可能希望在循环外声明它，并使其包含所有匹配的urls。
这是一段代码，我理解你想要做的事情：
import requests
from bs4 import BeautifulSoup
search_term = 'landscape'
posts_scrape = requests.get(f'https://www.tumblr.com/search/{search_term}')
soup = BeautifulSoup(posts_scrape.text, 'html.parser')
articles = soup.find_all('article', class_='_2DpMA')
urls = []
for article in articles:
try:
source = article.find('div', class_='_3QBiZ').text
for imgvar in article.find_all('img', alt='Image'):
url = next((i for i in imgvar['srcset'].split(',') if i.endswith('500w')), None)
if url:
urls.append(url.strip().replace(' 500w', ''))
except AttributeError as exc:
print(exc)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/68496091
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