Use `rpartition(s)`. It does exactly that.

You can also use `rsplit(s, 1)`.

    &gt;&gt;&gt; &quot;a b c,d,e,f&quot;.rsplit(&#39;,&#39;,1)
    [&#39;a b c,d,e&#39;, &#39;f&#39;]

You can split a string by the last occurrence of a separator with [`rsplit`][1]:

&gt; Returns a list of the words in the string, separated by the delimiter string (starting from right).


To split by the last comma:

    &gt;&gt;&gt; &quot;a b c,d,e,f&quot;.rsplit(&#39;,&#39;, 1)
    [&#39;a b c,d,e&#39;, &#39;f&#39;]

  [1]: http://docs.python.org/library/stdtypes.html#str.rsplit


I&#39;m using Jekyll to generate a simple site.

 I want the date field to display in the format `12 September 2011`.

I&#39;ve found, through some creative googling, a bit of date-format manipulation, but nothing that seems to get me the month name. What I have is `{{ page.date| date: &quot;%m-%d-%Y&quot; }}`, which gets me output as `09-12-2011`, but isn&#39;t quite what I&#39;m looking for. 

Is there any way to get the month as a name in Jekyll?

Or, barring that, is there any documentation for the date attribute?

How does Jekyll date formatting work?

    class Agents &lt;&lt; ActiveRecord::Base
      belongs_to :customer
      belongs_to :house
    end

    class Customer &lt;&lt; ActiveRecord::Base
      has_many :agents
      has_many :houses, through: :agents
    end
    
    class House &lt;&lt; ActiveRecord::Base
      has_many :agents
      has_many :customers, through: :agents
    end


How do I add to the `Agents` model for `Customer`?

Is this the best way?

    Customer.find(1).agents.create(customer_id: 1, house_id: 1)

The above works fine from the console however, I don&#39;t know how to achieve this in the actual application. 

Imagine a form is filled for the customer that also takes `house_id` as input. Then do I do the following in my controller?

    def create 
      @customer = Customer.new(params[:customer])
      @customer.agents.create(customer_id: @customer.id, house_id: params[:house_id])
      @customer.save
    end

Overall I&#39;m confused as to how to add records in the `has_many :through` table?





how to add records to has_many :through association in rails

I would like to know if there is any built in function in python to break the string in to 2 parts, based on the last occurrence of a separator.

for eg:
consider the string &quot;a b c,d,e,f&quot; , after the split over separator &quot;,&quot;, i want the output as

&quot;a b c,d,e&quot; and &quot;f&quot;. 

I know how to manipulate the string to get the desired output, but i want to know if there is any in built function in python.

split string in to 2 based on last occurrence of a separator

I would like to know if there is any built in function in python to break the string in to 2 parts, based on the last occurrence of a separator.
for eg:
consider the string "a b c,d,e,f" , after the split over separator ",", i want the output as
"a b c,d,e" and "f".
I know how to manipulate the string to get the desired output, but i want to know if there is any in built function in python.

I have to cluster the consecutive elements from a NumPy array. Considering the following example

    a = [ 0, 47, 48, 49, 50, 97, 98, 99]

The output should be a list of tuples as follows

    [(0), (47, 48, 49, 50), (97, 98, 99)]

Here the difference is just one between the elements. It will be great if the difference can also be specified as a limit or a hardcoded number.

How to find the groups of consecutive elements in a NumPy array

I have a sub-string:

    substring = &quot;please help me out&quot;

I have another string:

    string = &quot;please help me out so that I could solve this&quot;

How do I find if `substring` is a subset of `string` using Python?


How to determine whether a substring is in a different string

I have a Django model with a start and end date range. I want to enforce validation so that no two records have overlapping date ranges. What&#39;s the simplest way to implement this so that I don&#39;t have to repeat myself writing this logic?

e.g. I don&#39;t want to re-implement this logic in a Form *and* a `ModelForm` *and* an admin form *and* the model&#39;s overridden `save()`.

As far as I know, Django doesn&#39;t make it easy to globally enforce these types of criteria. 

Googling hasn&#39;t been very helpful, since &quot;model validation&quot; typically refers to validating specific model fields, and not the entire model contents, or relations between fields.

Adding Custom Django Model Validation

Anyone can share a working example on how to call a simple C# library (actually its WPF) from python code? (I have tried using IronPython and had too much trouble with unsupported  CPython library my python code is using so I thought of trying the other way around and calling my C# code from Python). 

Here is the example I was playing with: 


    using System.Runtime.InteropServices;
    using System.EnterpriseServices;

    namespace DataViewerLibrary
    {
        public interface ISimpleProvider
        {
           [DispIdAttribute(0)]
           void Start();
        }
    
        [ComVisible(true)]
        [ClassInterface(ClassInterfaceType.None)]
        public class PlotData : ServicedComponent, ISimpleProvider
        {
           public void Start()
           {
              Plot plotter = new Plot();
              plotter.ShowDialog();
           }
        }
    }
Plotter is a WPF windows that plots an Ellipse

I don&#39;t know how to call this code from my python all. Any suggestions? 



Calling a C# library from python

In Python, I want to convert all strings in a list to integers.

So if I have:

    results = [&#39;1&#39;, &#39;2&#39;, &#39;3&#39;]

How do I make it:

    results = [1, 2, 3]


Convert all strings in a list to int

I want to convert a **std::string** into a **char*** or **char[]** data type.

    std::string str = &quot;string&quot;;
    char* chr = str;

Results in: **“error: cannot convert ‘std::string’ to ‘char’ ...”**.

What methods are there available to do this?

std::string to char*

Aside from `Integer.parseInt()` handling the minus sign (as documented), are there any other differences between `Integer.valueOf()` and `Integer.parseInt()`?

And since neither can parse `,` as a &lt;del&gt;decimal&lt;/del&gt; thousands separator (produces `NumberFormatException`), is there an already available Java method to do that?

Integer.valueOf() vs. Integer.parseInt()

If I have a string saying `&quot;abc.txt&quot;`, is there a quick way to get a substring that is just `&quot;abc&quot;`?

I can&#39;t do an `fileName.IndexOf(&#39;.&#39;)` because the file name could be `&quot;abc.123.txt&quot;` or something and I obviously just want to get rid of the extension (i.e. `&quot;abc.123&quot;`).

Remove file extension from a file name string

Good day. 

The one thing I now hate about Haskell is quantity of packages for working with string.

First I used native Haskell `[Char]` strings, but when I tried to start using hackage libraries then completely lost in endless conversions. Every package seem to use different strings implementation, some adopts their own handmade thing.

Next I rewrote my code with `Data.Text` strings and `OverloadedStrings` extension, I chose `Text` because it has a wider set of functions, but it seems many projects prefer `ByteString`.&lt;br /&gt;
Someone could give short reasoning why to use one or other?

PS: btw how to convert from `Text` to `ByteString`?

&gt; Couldn&#39;t match expected type
&gt; *Data.ByteString.Lazy.Internal.ByteString*
&gt;            against inferred type *Text*
&gt;       Expected type: IO Data.ByteString.Lazy.Internal.ByteString
&gt;       Inferred type: IO Text

I tried `encodeUtf8` from `Data.Text.Encoding`, but no luck:

&gt; Couldn&#39;t match expected type
&gt; *Data.ByteString.Lazy.Internal.ByteString*
&gt;            against inferred type *Data.ByteString.Internal.ByteString*


**UPD:**

Thanks for responses, that *Chunks goodness looks like way to go, but I somewhat shocked with result, my original function looked like this:

    htmlToItems :: Text -&gt; [Item]
    htmlToItems =
        getItems . parseTags . convertFuzzy Discard &quot;CP1251&quot; &quot;UTF8&quot;


And now became:

    htmlToItems :: Text -&gt; [Item]
    htmlToItems =
        getItems . parseTags . fromLazyBS . convertFuzzy Discard &quot;CP1251&quot; &quot;UTF8&quot; . toLazyBS
        where
          toLazyBS t = fromChunks [encodeUtf8 t]
          fromLazyBS t = decodeUtf8 $ intercalate &quot;&quot; $ toChunks t


And yes, this function is not working because its wrong, if we supply `Text` to it, then we&#39;re confident this text is properly encoded and ready to use and converting it is stupid thing to do, but such a verbose conversion still has to take place somewhere outside `htmltoItems`.

Content Type	Original Author	Original Content on Stackoverflow
Question	Yashwanth Kumar	View Question on Stackoverflow
Solution 1 - Python	Petar Ivanov	View Answer on Stackoverflow
Solution 2 - Python	Gryphius	View Answer on Stackoverflow
Solution 3 - Python	wRAR	View Answer on Stackoverflow

split string in to 2 based on last occurrence of a separator

Python Problem Overview

Python Solutions

Solution 1 - Python

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Solution 3 - Python

how to add records to has_many :through association in rails

How does Jekyll date formatting work?

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