I have some html tags that I've selected in Beautiful Soup based on some criteria. I'd like to be able to do further queries (e.g. find() or find_all()) on these tags however I haven't been able to find a method that would allow this since they are all separate entities.
I would combine the tags from the beginning. Combine the initial queries into one by using the ability to pass in a list to the find_all() method, and then search on that result. Here is an example that will return all the links in a table cell, table header, or div:
soup.find_all(["td","th","div"]).find_all("a")
Link to the documentation about lists: http://www.crummy.com/software/BeautifulSoup/bs4/doc/#a-list
If your initial query is complicated you can bundle it in a function: http://www.crummy.com/software/BeautifulSoup/bs4/doc/#a-function
rather than combining everything in a line, i would prefer to separate them. For example, i would first using find_all() to capture them into a list then use find() to narrow down my search.
container = soup.find_all("tag",{"tag class":"tag class name"})
what_i_want = container.find("another tag")
hope this helps
Related
I saw in cytoscape application we have features like find and filter by keywords and degree. I tried a workaround following the original docs. Here you can see the demo webdemo.intolap.com/cytoscape (view-source for the source code or snippet). The filter works well partially. Example, "apple" will display apple and it's connected nodes (1st level) just what I am looking for.
But the problem I am facing is about resetting the graph and filter again with a
different keyword. It seems the filter function does not work after the text box is cleared and then keyed in a different keyword.
I mean when I clear the text box, it resets the graph to original which is correct. I did that using an init() function which reinstates the graph. But then if I search for "Ball" filter does not work. Any help please. Thanks!
actually there is a reasonably good explanation in the official docs here, but to be honest, I too struggled with this feature at first:
Basically, you can filter the specific collection you want to search by just inserting a filter query. So if you want to filter all nodes, you can use this:
cy.nodes(filterQuery);
If you want to filter all elements, just call this:
cy.elements(filterQuery);
If you want to make it easy, you can use this short version (short for cy.filter(...)):
cy.$(filterQuery);
The filter query itself is not that hard, you can do this (assuming that you have a node with the id "first" or an attribute like nodeColor "#2763c4"):
cy.$('[id != "first"]');
cy.$('[id = "first"]');
cy.$('[nodeColor = "#2763c4"]');
cy.$('[weight > 50]');
Additionally, you can specify the target collection within your filter query like this:
cy.$('node[id != "first"]');
Lastly, if you need complex filtering, you can use a function to apply that logic to the filter, for that just do this:
cy.$(function(element, i){
return element.isNode() && element.data('weight') > 50;
});
Sounds like you are trying to cy.filter on a cytoscape instance that no longer exists at that point. That's why it works the first time, but not the second time (after you reinstate the graph, which probably means destroy & create).
You need to make sure you point your filter handlers to the active cytoscape instance.
I'm new with liquid and ruby, but I would like to create a custom filter in a collection, to filter by metafields. I already have:
A dropdown in the collection.liquid, with the values I would like to filter for.
When selecting a filter, it goes to a link like: https://myshop.myshopify.com/collections/my-collection/my-filter . Basically it is like the tags, but with my filter instead
However, since it is a custom filter and not a tag, I get no results. I'm wondering where is the query that displays all the products (or filters) is in the code. I know that it depends on the theme, but I'm using the default theme: launchpad-star.
Not sure if I could do it this way or with a link like: https://myshop.myshopify.com/collections/my-collection?filter_by=my-filter , in which case, I would also need where should the logic go.
I've looked at the forums already and found two closed tickets with no responses: https://ecommerce.shopify.com/c/ecommerce-design/t/using-metafields-to-create-filter-drop-downs-in-collection-liquid-187513 and https://ecommerce.shopify.com/c/ecommerce-design/t/using-metafields-to-create-filter-drop-downs-in-collection-liquid-134401 .
Thanks in advance
Probably not the best solution, but this is what I did to solve the problem:
I changed to the second option of the url, so when a user selects an option in the combobox, it is sent to a URL like: myshop.myshopify.com/collections/my-collection?filter_by=my-filter
In product-grid-item.liquid, I'm getting the metafield value of the product and displaying it as a class, and hide all the products as default. In the collection.liquid I read with javascript the value of the parameter (filter_by) and remove the "hide" class of the products with the value of the filter_by as class, so it gets displayed.
I feel that it is not very clean, but it is working as expected. Problems with this solution:
* Not displaying all the products and then filtering them
* I need to display all the products to avoid pagination, which could be a big problem if I have a lot of products.
If anyone could post a better solution, welcome!.
I am calling the Wikipedia API from Java using the following search query to generate redirected pages:
https://en.wikipedia.org//w/api.php?format=json&action=query&generator=allpages&gapfilterredir=redirects&prop=links&continue=&gapfrom=D
where the final 'D' is just an example for the continue-from.
I am interested in only iterating over items in namespace:0. In fact, if I don't, the continue return value includes category pages, which break the next query iteration.
Thank you in advance.
The parameter you need from the Allpages api is
…&gapnamespace=0&…
but notice that when you omit it, then 0 is the default anyway.
I wish to use Wikipedia api to extract the result of this page:
http://en.wikipedia.org/wiki/Special:PrefixIndex
When searching "something" on it, for example this:
http://en.wikipedia.org/w/index.php?title=Special%3APrefixIndex&prefix=tal&namespace=4
Then, I would like to access each of the resulting pages and extract their information.
What api call might I use?
You can use list=allpages and specify apprefix. For example:
http://en.wikipedia.org/w/api.php?format=xml&action=query&list=allpages&apprefix=tal&aplimit=max
This query will give you the id and title of each article that starts with tal. If you want to get more information about each page, you can use this list as a generator:
http://en.wikipedia.org/w/api.php?format=xml&action=query&generator=allpages&gapprefix=tal&gaplimit=max&prop=info
You can give different values to the prop parameter to get different information about the page.
I am making something that's like that autocomplete tags field for the posts on stackoverflow.com
I want to make it so that when you make a blog post, you can tag it with words in a database, similar to SO.
For the posts, it belongs_to_and_has_many tags
For the tags, it belongs_to_and_has_many posts
However it is a problem for me to do it on the same page because #post would be nil.
How can I implement this?
(If someone can give me the code for the stackoverflow ask question page that would be AWESOME)
I think the problem here is that it seems like you are asking two different questions. Please correct me if I'm wrong on this.
The first question is how you would implement the autocomplete feature to allow users to easily select from a pre-populated list of tags. To answer this, you might refer to spncrgr's answer above.
The second question is how to deal with associating these retrieved tags to the current post. For this you can add additional javascript functionality to your autocomplete solution. When a user selects which tag they want from the autocomplete field, you can do like StackOverflow does and add the tag to a list of tags in a single text field. These can be either space or comma delimited. When you submit the form to create the new post, you can parse this field into it's separate tags:
tags = params[:tags].split(' ')
You can then associate these tags to the model in the Post#create action.
This may not help you at all (or you may have already seen it), but here's a link to a Railscasts' episode on auto-complete:
http://railscasts.com/episodes/102-auto-complete-association
I know it helped me when trying to do something similar.
HTH
It looks for me like you want to generate tags automatically.
You could create
class Post
before_save :create_tags
private
def create_tags
# get your tags somehow
self.tags << Tag.new(:text=>"...")
end
end
method in models/post.rb and build them there.
If you want to search among existing tags for your auto-suggest, you should have it match from Tag.all, as that won't be nil, just as you would collect a group of objects in a select drop down. Not sure about the code for auto-complete, but the tags should be in the Tag table.