所以我有以下两个BeautifulSoup发现和正在网页抓取的网页:
r = requests.get("https://www.viperprint.pl/produkt/arkusze-plano/AP01")
soup = BeautifulSoup(r.content)
elems = soup.find_all('a', {'class': 'tabela_cenowa eprint_product_link add_to_cart_link'})
hehes = soup.find_all('a', {'id': 'dLabel'})
我需要的是double for循环,该循环将列表打印到.csv文件中的单独列中。
这是我的问题:
>>> for elem, hehe in zip(elems, hehes):
... nazwa = hehe.get('title')
... qty = elem.attrs.get('data-qty')
... print(nazwa, qty)
请给我下面的输出。这是错误的,因为第1列中的每个元素(因此,“ Arkusze PLANO”和所有波纹管)都应彼此相邻,并且第2列中的第一个数字(“ 100”)也应排成一行。
错误的输出:
('Arkusze PLANO', '100')
('A1+ (880 x 630 mm)', '250')
('Dwustronnie kolorowe (4+4 CMYK)', '500')
(u'Kreda b\u0142ysk 130g', '1000')
('Bez uszlachetniania (0+0)', '1500')
(None, '2000')
预期输出:
'Arkusze PLANO';'A1+ 880 x 630 mm';'Dwustronnie kolorowe 4+4 CMYK';u'Kreda b\u0142ysk 130g';'Bez uszlachetniania 0+0';'100'
我想做的是使用.attrs函数,如下所示:
for elem, hehe in zip(elems, hehes):
nazwa = hehe[0].get('title')
format = hehe[1].get('title')
qty = elem.attrs.get('data-qty')
print(nazwa, format, qty)
...但是我遇到了以下错误,并且不知道如何继续:
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "/usr/lib/python2.7/site-packages/bs4/element.py", line 905, in __getitem__
return self.attrs[key]
KeyError: 0
对于这么长的帖子,我感到抱歉,但是我想提供尽可能多的细节。
答案 0 :(得分:0)
这将为您提供所需的列表中输出:
import requests
import bs4
r = requests.get("https://www.viperprint.pl/produkt/arkusze-plano/AP01")
soup = bs4.BeautifulSoup(r.content, 'html.parser')
elems = soup.find_all('a', {'class': 'tabela_cenowa eprint_product_link add_to_cart_link'})
hehes = soup.find_all('a', {'id': 'dLabel'})
results = []
nazwa_list = []
qty_value = None
for elem, hehe in zip(elems, hehes):
nazwa = hehe.get('title')
if qty_value == None:
qty_value = elem.attrs.get('data-qty')
if nazwa != None:
nazwa_list.append(nazwa)
nazwa_list.append(qty_value)
results = nazwa_list
输出:
In [1]: print (results)
Out [1]: ['Arkusze PLANO', 'A1+ (880 x 630 mm)', 'Dwustronnie kolorowe (4+4 CMYK)', 'Kreda błysk 130g', 'Bez uszlachetniania (0+0)', '100']
但是您声明要放入csv。因此,您可以将其放入表格中,然后根据需要使用它
import requests
import bs4
import pandas as pd
r = requests.get("https://www.viperprint.pl/produkt/arkusze-plano/AP01")
soup = bs4.BeautifulSoup(r.content, 'html.parser')
elems = soup.find_all('a', {'class': 'tabela_cenowa eprint_product_link add_to_cart_link'})
hehes = soup.find_all('a', {'id': 'dLabel'})
results = pd.DataFrame()
for elem, hehe in zip(elems, hehes):
nazwa = hehe.get('title')
qty = elem.attrs.get('data-qty')
temp_df = pd.DataFrame([[nazwa, qty]], columns = ['title', 'qty'])
results = results.append(temp_df)
答案 1 :(得分:0)
我添加了另一个循环以获得完全想要的输出。
for elem in elems:
qty = elem.attrs.get('data-qty')
print(results, qty, pricenum)
谢谢大家的帮助!