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[英]how to extract portion of a string between two substrings in a multiline string in python
[英]How can I extract substrings between two characters in python?
我有一個從 HTML 代碼轉換而來的討厭的字符串,如下所示:
<p><topic url="car-colours">Toyota Camry</topic> has <a href="/colours/dark-red">Dark Red</a><span> (2020)</span>, <a href="/colours/pearl-white">Pearl White</a><span> (2016 - 2017)
我想從這個字符串中提取顏色的名稱並將它們放在一個列表中。 我在想也許我提取了 ">" 和 "<" 字符之間的所有子字符串,因為所有顏色都包含在其中,但我不知道如何。
我的目標是有一個列表來存儲豐田凱美瑞的所有顏色,例如: toyota_camry_colours = ["Dark Red", "Pearl White"]
任何想法我怎么能做到這一點? 在 bash 中,我會使用 grep 或 awk 之類的東西,但不知道 python。
BeautifulSoup 模塊旨在解析 HTML。
from bs4 import BeautifulSoup
str = """\
<p><topic url="car-colours">Toyota Camry</topic> has <a href="/colours/dark-red">Dark Red</a><span> (2020)</span>, <a href="/colours/pearl-white">Pearl White</a><span> (2016 - 2017)"""
soup = BeautifulSoup(str, 'html.parser')
for link in soup.find_all('a'):
print( link.text )
輸出:
Dark Red
Pearl White
一個簡單的正則表達式會幫助它/colours/([\\w-]+)
import re
txt = '<p><topic url="car-colours">Toyota Camry</topic> has <a href="/colours/dark-red">Dark Red</a><span>' \
' (2020)</span>, <a href="/colours/pearl-white">Pearl White</a><span> (2016 - 2017)'
colors = re.findall(r"/colours/([\w-]+)", txt)
print(colors) # ['dark-red', 'pearl-white']
colors = [" ".join(word.capitalize() for word in color.split("-")) for color in colors]
print(colors) # ['Dark Red', 'Pearl White']
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