vial | simple web framework on top of http.server | Object-Relational Mapping library
kandi X-RAY | vial Summary
kandi X-RAY | vial Summary
Can I build a web app framework using just the in-built http.server and without pre-existing ORMs?. Introducing Vial [because flask.__sizeof__() > bottle.__sizeof__() > vial.__sizeof__()]. You can create applications and define database models that this application will use. These DB models can use of the available DB engines to run the queries on. As of now, only an engine for PostgreSQL has been written. DB engines are organized under vial/db and are classes derived from the Engine class in vial.db.base. They define functionality for the primary operations - creating a new table and basic CRUD operations - though it can later be extended to define more complex operations, like altering the table and operations involving joins. The base definition of a model (BaseModel in vial.orm.model) includes functionality for CRUD operations and pagination, which is run on top of the DB engine specified. The base definition of field (BaseField in vial.orm.field) includes basic serialization, which is used when creating the tables. The different field types are defined in vial.orm.types - they currently include strings, integers, floats, booleans and datetime objects. While creating a field in a model, you can also specify a default value (either as a plain value or a callable function) and a constraint validator (as a lambda function that takes as input the value that is to be in that field, and returns True or False). If no primary key is defined, a serial incrementing ID is used as primary key. For example, to create a user model -. Once the models have been defined, the next step is creating the application and defining all the routes. The application starts as an object of Application from vial.server.application. The next step is associating the models for this application (there is no self-discovery set up yet) and that is done using the define method. This is necessary for the initial set up - creating tables for the models when a table doesn't already exist. For example,. Here, engine is an object of the Postgresql class and 'example' is the name of the application (the created tables after set up will be example_user and example_post). Routes are defined as decorators for the functions that define the controller. The decorator takes two arguments - the accepted HTTP methods for that view, and a regular expression for the accepted path. Like any regular expression, the ^ denotes the start of the string and the $ denotes the end of the string. If the view takes parameters, the regex can include these parameters - for example, (?P\d+). There are helpers available for common URL features. For example, for GET requests that take a query string, you can specify for the query string. An example view would look like this. The running web server uses Handler from vial.server.handler as its request handler (derived from BaseHTTPRequestHandler) and this handles all of the incoming HTTP requests. The handle_http() method validates the path of the request and runs the corresponding controller. This class also includes get_post_body() and get_query_string() which can be used in POST and GET requests, respectively. Vial also includes a CLI to initialize the project (set up the tables) and run the web server. The app in the current directory is run. There are requirements to the project structure to make this set up work. The application should live in a module of its own, and should include an app.py where the primary bulk of the logic resides. As a summary, an application should (at the minimum) look like this -.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Authenticate a user
- Gets records from the database
- Get the body of the post
- Returns the fields of the model
- Create a new user
- Validate a record
- Validate record
- Check if the user is authenticated
- Retrieve a user from a token
- Update a product
- Update record
- List all products
- Retrieve a single page of records from the database
- Setup the database
- Serialize the table
- Returns the query string
- Execute a SELECT query
- Update a table
- Define models
- Get a specific product
- Command line interface
- Create sql query for a table
- Create SQL statement
- Create a new Product
- Delete a product
- Count the number of records in a table
vial Key Features
vial Examples and Code Snippets
Community Discussions
Trending Discussions on vial
QUESTION
I have unstructured data where I have to extract BP values and the dates(having different formats) as shown below. Right now I have a regex function to extract Bp values and the dates followed by BP values.
I have a specific case as highlighted in the picture where dates are followed by the word 'Recorded' and also has a time stamp.
Also, there is a case where the date occurs before the BP values. I need to extract that date and BP value as well.
Currently, the code I have gives the BP values and the dates that follow the BP values. Now I want this regex along with new cases as shown in the picture to extract all the cases.
I have attached the regex code below.
...ANSWER
Answered 2021-Mar-12 at 17:34You might extend the pattern with an alternation matching the specified cases, matching either a date like pattern when Recorded is at the left, or match a date like pattern when BP or Blood Pressure is at the right
QUESTION
i am trying to implement a highlight function for a well plate visualization i implemented. The visualization looks like this:
I already managed to get vials crossed out based on a property, but now i need to highlight a vial based on the selection of a row in a datagrid. The selected status of the row is already assigned to choosen sample. Now i only need to know how to change the visibility of the Stroke property of a ellipse.
My idea was something like this:
...ANSWER
Answered 2021-Feb-15 at 07:57QUESTION
I am trying retrieve stock prices and process the prices them as they come. I am a beginner with concurrency but I thought this set up seems suited to an asyncio producers-consumers model in which each producers retrieve a stock price, and pass it to the consumers vial a queue. Now the consumers have do the stock price processing in parallel (multiprocessing) since the work is CPU intensive. Therefore I would have multiple consumers already working while not all the producers are finished retrieving data. In addition, I would like to implement a step in which, if the consumer finds that the stock price it's working on is invalid , we spawn a new consumer job for that stock.
So far, i have the following toy code that sort of gets me there, but has issues with my process_data function (the consumer).
...ANSWER
Answered 2021-Feb-11 at 10:06But it seems that I have to choose between retrieving the output (result) of the function called by the executor and being able to run several subprocesses in parallel.
Luckily this is not the case, you can also use asyncio.gather() to wait for multiple items at once. But you obtain data items one by one from the queue, so you don't have a batch of items to process. The simplest solution is to just start multiple consumers. Replace
QUESTION
I'm trying to build a bar graph with echarts, where each bar has an hour and date associated with it. How can I group the dates so that they do not repeat? This should also update if the graph is zoomed in / panned accordingly. Thanks for the help!
What I have :
What I would like :
And what I currently have for my code :
...ANSWER
Answered 2021-Jan-15 at 01:55Try to use configuration below:
QUESTION
i'm trying to develop from scratch a WPF app with the use of Simpleinjector as a IOC container. I'm new on this topic and i have some issue regards lifetime of object and hot use them correctly.
I started the app by following the WPF integration guide on simpleinjector manual. But i don't understand how to receive a new instance every time a service needed it
As i ask in my previous post i need to receive a new unitOfWork every time a service need it.
as @Steven say on my previous post
Do note that transient means "allways a new instance is resolved when it is requested from the container." If you're not requesting it again, you will be operating on the same instance, which might explain the ObjectDisposedException.
In the other post i found a solutin but i think it's a little bit over-complicated and it's to create a factory and inject this instead of the instance because i want to call the container.getInstance only on the startup method and not on the service by passing the container as a dependency
It's the only way i have to achieve this or there is something that i don't understand on how to develop in DI way?
Example of code:
...ANSWER
Answered 2020-Oct-03 at 07:42Using Abstract Factory pattern is the most common and recommended approach. Using the container in your application directly is widely considered an anti-pattern, like the Service Locator (Service Locator is an Anti-Pattern) for a very good reason.
Abstract factory allows instantiation of objects without introducing a tight coupling to the actual implementation that knows how to create specific instances.
Most IoC frameworks support this pattern natively. Most of the time they provide the generic interface for the factory. You register the instance (the product) with the container and the framework will export a ready-to use factory for you. You add the dependency to this framework interface to your object e.g. constructor. Then you register the generic factory interface. The framework will automatically create the instance of the factory and inject it into the relevant instances e.g., via constructor.
I am not too familiar with Simple Injector, but the framework really keeps things simple. There is no such code generation.
But the pattern is very simple (that's why this is so easy to automate) and in no way complicated.
Example
The interface required to dynamically create the instances of type TInstance:
QUESTION
I have a data frame like as shown below
...ANSWER
Answered 2020-Oct-01 at 14:23You can consider a pattern like
QUESTION
I'm relatively new to 3D printing, but I've taken to it with much gusto. I wish I'd done this years ago.
Trying to solve a printing problem, and I've been stymied by not knowing the name for the effect I'm seeing - there is zero chance I'm the first one to discover this.
A minimum reproducible example is a triplet of vertical cylinders on a raft, it's clear that the tool path starts at one spot, runs a full circle around to end in that same spot, and it lingers long enough to extrude just a tiny bit more material that builds up in a vertical line.
This matches exactly the tool path shown in the slicer and this effect is repeatable no matter how many parameters I changed. I've done many dozens of test prints and am not getting anywhere.
These are 16mm across and are used as inserts into a tray holding vials to shim a narrower diameter tube, and the bump is enough to matter. I have to make thousands of these and am hoping not to have to file them all down by hand.
If it matters, I'm using a Sindoh 3DWOX 2D and a 3DWOX 1 with PLA filament.
- Is there a name for this effect?
- Are there mitigations?
I'm starting to rethink this whole approach...
...ANSWER
Answered 2020-Sep-25 at 15:21I was happy to find my own answer elsewhere.
First, that effect is known as a "seam", and one mitigation is known as "vase mode" (known in some slicers as "Spiralise Outer Contour"), which builds the cylinder in a continuous spiral from the bottom up with no seam. It can create really nice aesthetically-pleasing prints.
However, vase mode only works for a single model because stopping (and possibly retracting) to print a second model breaks the whole continuous-spiral thing.
So, if I had only a few of these to print, I'd do them one at a time, but given that I need thousands of them, I've found other approaches to solving the problem.
QUESTION
I was doing this program and tried to run an app as an output. However, when I turned the app in Landscape mode, my text output didn't work. I realized that I need to add onSaveInstanceState in the Kotlin code, which I don't know how to do.
MainActivity.kt:
...ANSWER
Answered 2020-Sep-02 at 08:26You need to override onSaveInstanceState and onRestoreInstanceState example follows
class MainActivity : AppCompatActivity() { private lateinit var resultTv: TextView private var count = 0
QUESTION
I am running an app that has 2 buttons, one for increasing value and another for decreasing value. In this, I need to run the values between 10 and 0 but I couldn't do it(whenever I run the app, it goes below 0 and over 10).
...ANSWER
Answered 2020-Sep-02 at 06:42how if you move if statement inside the listener
QUESTION
it is me again the Powershell-Newbie (i am working with powershell for 11 days by now).
So what is the problem i have so far: I am reading out csv files from different folders and merge the data into one big csv (bigCSV). The bigCSV is a living document, so i am adding data manually into this worksheet.
The problem is, if I have to update the bigCSV (with new csv files) the existing bigCSV gets overwritten and my manually added data gets lost.
I have tried to add -append to my code, but the result is not satisfying, because the manually added data still consits but now i have duplicates ...
This is my Code so far ...
...ANSWER
Answered 2020-Aug-04 at 09:25You could Import the CSV file to Excel sort it and use the -Unique flag then export it again.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install vial
You can use vial 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.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
