大约有 40,000 项符合查询结果(耗时:0.0485秒) [XML]

https://stackoverflow.com/ques... 

retrieve links from web page using python and BeautifulSoup [closed]

...ref'): print(link['href']) The BeautifulSoup documentation is actually quite good, and covers a number of typical scenarios: https://www.crummy.com/software/BeautifulSoup/bs4/doc/ Edit: Note that I used the SoupStrainer class because it's a bit more efficient (memory and speed wise), if you...
https://stackoverflow.com/ques... 

Understanding garbage collection in .NET

... Now run your program again and tinker with the source code. Note how the extra braces have no effect at all. And note how setting the variable to null makes no difference at all. It will always print "1". It now works the way you hope and expected it would work. Which does leave with the task ...
https://stackoverflow.com/ques... 

Execute code when Django starts ONCE only?

... entirely a separate problem. The idea of special one-time startup before all management commands is hard to understand. You'll have to provide something specific. Perhaps in another question. – S.Lott Feb 13 '12 at 12:49 ...
https://stackoverflow.com/ques... 

How to send a PUT/DELETE request in jQuery?

...ch as PUT and DELETE, can also be used here, but they are not supported by all browsers." from: api.jquery.com/jQuery.ajax/#options – andilabs Dec 2 '13 at 8:11 23 ...
https://stackoverflow.com/ques... 

Blocks on Swift (animateWithDuration:animations:completion:)

... dat completion block syntax :( – Chris Allinson Sep 25 '16 at 0:19 add a comment  |  ...
https://stackoverflow.com/ques... 

Make the current commit the only (initial) commit in a Git repository?

...e using submodules, you should use e.g. interactive rebase Step 1: remove all history (Make sure you have backup, this cannot be reverted) cat .git/config # note <github-uri> rm -rf .git Step 2: reconstruct the Git repo with only the current content git init git add . git commit -m "Init...
https://stackoverflow.com/ques... 

Navigation in django

... I like this idea a lot, especially for flexibility, but it comes with the less-DRY trade-off. I did start using this in a site though. – anonymous coward Sep 22 '09 at 14:47 ...
https://stackoverflow.com/ques... 

Python Pandas: Get index of rows which column matches certain value

... frame (whose data may be gibabytes). What about dftest? Doesn't this also allocate a very large intermediate object where the returned index may be very small, or even empty. Are these magically optimized away using lazy views. If not then surely there must be an efficient way. ...
https://stackoverflow.com/ques... 

Having options in argparse with a dash

...l argument actions, the value of dest is normally inferred from the option strings. ArgumentParser generates the value of dest by taking the first long option string and stripping away the initial -- string. Any internal - characters will be converted to _ characters to make sure the string is a val...
https://stackoverflow.com/ques... 

How can I create an error 404 in PHP?

My .htaccess redirects all requests to /word_here to /page.php?name=word_here . The PHP script then checks if the requested page is in its array of pages. ...