正則表達式提取的類別/子類別的網址與Python

Question

我有網址解析形式：

www.my-journal.com/category/sub-category/sub-sub-category/title 
www.my-journal.com/category/sub-category/sub-sub-category 
www.my-journal.com/category/sub-category/ 
www.my-journal.com/category/ 
www.my-journal.com 

與改變的類別，亞類和子子類別。

我可以使用什麼正則表達式來提取類別，子類別和子類別存在時的正確表達式？有沒有更好的方法來使用這些變量？

Answer 1

爲什麼你不只是在/

categories = url.split('/')[1:] 

分割字符串

Answer 2

>>> txt = 'www.my-journal.com/category/sub-category/sub-sub-category/title' 
>>> re.findall(r'/[^/]*', txt) 
['/category', '/sub-category', '/sub-sub-category', '/title'] 

如果只上到3級，那麼也許：

>>> iter = re.finditer(r'/([^/]*)', txt) 
>>> for _, m in zip(range(3), iter): 
...  print(m.group(1)) 
... 
category 
sub-category 
sub-sub-category