Question

我有这行：

<div data-asin="B0000BYDR1" data-asin-currency-code="USD" data-asin-price="45.66" data-asin-shipping="0" data-device-type="WEB" data-display-code="Asin is not eligible because it is price competitive" data-substitute-count="-1" id="cerberus-data-metrics" style="display: none;"></div>

我想提取价格：45.66和data-asin-price="之间的价格" data-asin-shipping

我找到了这段代码，但是效果不佳。

def extractSubstring(text, sub1, sub2):
  pos1 = text.lower().find(sub1) + len(sub1)
  pos2 = text.lower().find(sub2)
  if pos1 > pos2 and pos2 > 0:
    return text[pos1:pos2]
  elif pos2 > pos1 and pos1 > 0:
    return text[pos2:pos1]
  elif pos1 > 0:
    return text[pos1:]
  elif pos2 > 0:
    return text[pos2:]

result = soup.find_all(attrs={"data-asin-currency-code": "USD"})
priceLine='<div data-asin="B0000BYDR1" data-asin-currency-code="USD" data-asin-price="45.66" data-asin-shipping="0" data-device-type="WEB" data-display-code="Asin is not eligible because it is price competitive" data-substitute-count="-1" id="cerberus-data-metrics" style="display: none;"></div>'

sub1 = 'data-asin-price="'
sub2 = '" data-asin-shipping'

substring = extractSubstring(str(priceLine), sub1, sub2)

Answer 1

BeautifulSoup是必经之路

html = bs4.BeautifulSoup('<div data-asin="B0000BYDR1" data-asin-currency-code="USD" data-asin-price="45.66" data-asin-shipping="0" data-device-type="WEB" data-display-code="Asin is not eligible because it is price competitive" data-substitute-count="-1" id="cerberus-data-metrics" style="display: none;"></div>')

然后：

print(html.div['data-asin-price'])
45.66

如何使用python提取两个字符串之间的子字符串

1 个答案: