从多个URL的字符串中检索特定的URL

Question

我在字符串中有一个URL列表，我需要从字符串中检索特定的URL。 （使用Python）

这里是输出字符串：

https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=100&q=60 100w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=200&q=60 200w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=300&q=60 300w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=400&q=60 400w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60 500w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=60 600w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=700&q=60 700w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=60 800w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=900&q=60 900w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1000&q=60 1000w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1100&q=60 1100w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1200&q=60 1200w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1296&q=60 1296w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1400&q=60 1400w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1600&q=60 1600w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1800&q=60 1800w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2000&q=60 2000w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2200&q=60 2200w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2400&q=60 2400w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2588&q=60 2588w

我想提取1800w之前和1600w之后的URL。关于如何执行此操作的任何帮助都将有所帮助！

Answer 1

如果它始终是1600w和1800w之间的部分，则可以使用此正则表达式。

import re

regex = r"1600w,(.+)1800w"

test_str = "https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=100&q=60 100w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=200&q=60 200w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=300&q=60 300w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=400&q=60 400w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60 500w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=60 600w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=700&q=60 700w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=60 800w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=900&q=60 900w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1000&q=60 1000w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1100&q=60 1100w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1200&q=60 1200w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1296&q=60 1296w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1400&q=60 1400w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1600&q=60 1600w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1800&q=60 1800w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2000&q=60 2000w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2200&q=60 2200w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2400&q=60 2400w, https://images.unsplash.com/photo-1535083783855-76ae62b2914e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2588&q=60 2588w"

matches = re.findall(regex, test_str, re.MULTILINE)

print(matches[0])