rain | 🌧 BitTorrent client and library in Go | Stream Processing library

You are looking for DataFrame.rolling. It creates a rolling window of size n that you can perform operations with.

You want

#Update

You won't need to serialiaze your array of entities.

In your entity you can declare

There is no word boundary between n_ as \w also matches an underscore.

To match 2 or more word characters without an underscore, and allowing only a whitespace boundary or an underscore to the left and right:

A DataFrame is a collection of aligned Series, aligned means that all Series are labeled in the same manner. The common part or labels is called Index and it is nothing more than a pimped Serie.

Operations with Series tend to return a Serie itself, easily it is an element-wise comparison, the result is an array of boolean of the same size and with the same labels a boolean array, called mask.

You can add if __name__ == "__main__": in your main.py file.

For example:

There is always an implied:

INHERIT += "base"

which includes base.bbclass and conf/bitbake.conf is also included. These provide many of the defaults you're relying upon. Placing an empty bitbake.conf alongside local.conf would do something quite different (and break many things but proves how much it does).

it would depend on which sql server you use, but in general, you should extract the day and the month from the date (on Microsoft SQL Server it is the DATEPART function) and then group by that and calculate the averages.

Whenever you run a Rails command, it will potentially set up a bunch of classes before doing the actual work, and unlike many other languages, in Ruby this setup is done by actual Ruby code (this is how DSLs work), and any broken code that runs during that time will prevent any commands from running.

It won't run any instance methods, but any broken class-level code will cause issues.

So the migration thing is just a red herring, presumably all your Rails commands are broken.

According to your stacktrace, app/models/user.rb:8 (which you haven't provided), is getting run during initialisation. Models getting loaded during initialisation is quite common, but in this case that code is breaking.

Looking at the ActiveRecord source code (with less -N `bundle show activerecord`/lib/active_record/persistence.rb and looking at line 138), you seem to be calling the destroy class method (e.g. User.destroy(1)) but without parameters, like you do with the destroy instance method (e.g. User.find(1).destroy). So you should make sure you understand the difference between these two.

I'm not sure why you would be calling User.destroy outside of an instance method, but not having the relevant user model code I cannot say. Is there just a stray "destroy" by itself there?