kev | Python ORM for key-value stores | Object-Relational Mapping library
kandi X-RAY | kev Summary
kandi X-RAY | kev Summary
K.E.V. (Keys, Extra Stuff, and Values) is a Python ORM for key-value stores and document databases based on Valley. Currently supported backends are Redis, S3 and a S3/Redis hybrid backend.
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Top functions reviewed by kandi - BETA
- Evaluate documents
- Sort a list of documents
- Get a single document from the server
- Returns a generator of all documents
- Saves a single document
- Set the primary key
- Save a document
- Create the primary key for the given document
- Evaluate filters
- Prepare a list of filter names
- Removes a document from the database
- Remove document from model set
- Removes a document from the collection
- Return a list of index names
- Save a document to DynamoDB
- Add indexes
- Evaluate the filters
- Parses a document id
- Save a document to the database
- Removes a document from the index
- Get a document by id
- Parse a requirements file
kev Key Features
kev Examples and Code Snippets
Community Discussions
Trending Discussions on kev
QUESTION
I'm very new to python and I have two dataframes... I'm trying to match the "Names" aka the columns of dataframe 1 with the rows of dataframe 2 and collect the value for the year 2022 with the hopeful output looking like Dataframe 3... I've tried looking through other queries but not found anything to help, any help would be greatly appreciated!
...ANSWER
Answered 2022-Apr-17 at 15:17There are many different ways to achieve this.
One option is using map
:
QUESTION
I'm trying to migrate a SQL query to a SparkSQL one. My main issue is with string_split
function which I'm trying to replace with explode
combined with split
. Still giving me some errors..
The original query looks like this:
...ANSWER
Answered 2022-Feb-02 at 20:04Create the data:
QUESTION
I would need some help regarding a SQL query that I can't figure out. I have 2 tables like this:
...ANSWER
Answered 2022-Feb-02 at 14:24If I understand correctly you could do this:
QUESTION
I want to plot a bar plot from pandas dataframe and have a reasonable amount of xticks.
My dataframe (data) looks like this:
...ANSWER
Answered 2022-Jan-25 at 20:37Have you tried ax4.bar(data["Energy [keV]"], data["Counts"], width=1, align='center')
?
QUESTION
I am making an angular project and one of my links must redirect to another website. In my dev environment this is a localhost url such as locahost:4210
.
Because this is an unsafe operation to angular I have tried to use a DomSanitizer
to allow the use of such an url like so :
JS :
...ANSWER
Answered 2022-Jan-17 at 15:06You can implement a safe pipe that facilitates the DomSanitizer like so:
QUESTION
My code is supposed to model the average energy for alpha decay, it works but it is very slow.
...ANSWER
Answered 2021-Dec-22 at 07:53I won't tell you where the bottleneck is, but I can tell you how to find bottlenecks in complex programs. The keyword is profiling. A profiler is an application that will run alongside your code and measure the execution times of each statement. Search online for python profiler.
The poor person's version would be debugging and guesstimating the execution times of statements or using print statements or a library for measuring execution times. Using a profiler is an important skill that's not that difficult to learn, though.
QUESTION
So I have some user documents that have first names and names. I'd like to offer the possibility to filter them if a given input "looks like" that fullname.
...ANSWER
Answered 2021-Dec-07 at 11:57For aggregation you can use $function to execute custom code. However that kind of defeats the purpose of pagination as Mongo has to execute this code for each document, additionally it is recommended not to execute js in Mongo as it has somewhat bad performance.
It seems like you're just using the wrong database for the job, If this is a crucial feature I recommend trying a text search db like atlas search or elasticsearch
If changing db is not an option, and this feature is too important to remove or alternate. maybe if your provide additional detail as to how the scoring works it'll be easier to give a full answer.
QUESTION
All of a sudden I keep on getting this error on most interactions and my bot just sends `"Bot is thinking...".
...ANSWER
Answered 2021-Nov-30 at 06:46If you do not reply or acknowledge the interaction in 3 seconds. There's a cooldown!
The user will see interaction failed and the reply gate is closed.
However, if you defer the reply and edit later, the gate will open until you update the defer or edit the reply. Here's how to do it, and here's the documentation about it.
QUESTION
I defined an .xlsx
file path as the variable output
:
ANSWER
Answered 2021-Oct-28 at 12:02try to put the path this way
QUESTION
I have a simulated signal which is displayed as an histogram. I want to emulate the real measured signal using a convolution with a Gaussian with a specific width, since in the real experiment a detector has a certain uncertainty in the measured channels.
I have tried to do a convolution using np.convolve
as well as scipy.signal.convolve
but can't seem to get the filtering correctly. Not only the expected shape is off, which would be a slightly smeared version of the histogram and the x-axis e.g. energy scale is off aswell.
I tried defining my Gaussian with a width of 20 keV as:
...ANSWER
Answered 2021-Aug-13 at 09:44As you may be aware, doing the convolution of the two histograms with the same bin size will give the histogram of the result of adding each element of one of the samples with each elements of the other of the samples.
I cannot see exactly what you are doing. One important thing that you seem to not be doing is to make sure that the bins of the histograms have the same width, and you have to take care of the position of the edges of the second bin.
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Install kev
You can use kev like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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