mdf | Data-flow programming toolkit for Python | Functional Programming library
kandi X-RAY | mdf Summary
kandi X-RAY | mdf Summary
mdf stands for man systematic strategies data-flow. mdf is a toolkit for expressing programs in Python as directed acyclic graphs (DAGS). mdf was developed to make it easier to wire together quantitative trading strategies composed of related computations over time-series data, but it can be used as a toolkit for describing general computations as DAGS. The full documentation, with examples, can be found here:
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Top functions reviewed by kandi - BETA
- Write a callable to a pydot file
- Get a node by name
- Get the callers of the given node
- Get the state of a context
- Difference between two DataFrames
- Relabels the given columns
- Get the columns for a node
- Returns a pandas dataframe
- Exports a dataframe
- Get alternate context
- Get the value for a node
- Decorator to mark a function as a node
- Sets the node
- Return a list of values that match the given criteria
- Called when a MDFContext is set
- Creates a MDF row iterator
- Unpickle a context
- Saves the context to disk
- Show MDF nodes
- Start a remote server
- Read data from the stream
- Load a context
- Applies given function to given value
- Determines if the context is filtered
- Returns the context filter
- Combine result from another
mdf Key Features
mdf Examples and Code Snippets
Community Discussions
Trending Discussions on mdf
QUESTION
i am a absolute beginner... and it is my first database based application.
i would like to drop a c# wpf application with database (2 tables) on an offline single-user-client. its a wpf c# ef6 code first app. on my machine with vs2019 it runs as intended. now trying to run it on a new set up win10 machine it doesnt even start.
- net 4.7.2 is installed
- sql server 2016 localdb is installed manually (.msi)
Here is the connectionString for my db:
...ANSWER
Answered 2022-Feb-21 at 09:37LocalDB is required to be installed separately on the client machine.
If you want to "drop" deploy your database along with the application itself you should use a self-contained database like SQLite.
If you choose to stick with using LocalDB, you need to ensure that your database file is deployed to |Datadirectory|\ZuschnittverwaltungDB.mdf (or whatever path you have specified in the configuration file) on the target machine.
QUESTION
So I am facing an error while attaching my SQL database .mdf file to my SQL server 2019. SQL server showing me the error like below:
Database cannot be opened because it is version 869. this server supports version 852 and earlier. A downgrade path is not supported..
I am using SQL server latest version with express edition. and note here database came from another PC but I'm using the latest version then why this is happening to me. Please guide me to resolve this issue.
...ANSWER
Answered 2021-Sep-17 at 18:10Solution:
1- Uninstall SQL Server Express 2016 LocalDB
2- Delete remaining folder C:\Program Files\Microsoft SQL Server\130\
3- Install SQL Server Express 2019 LocalDB :https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/sql-server-express-localdb?view=sql-server-ver15
4- Run
SqlLocalDB create MSSQLLocalDB
sqllocaldb start MSSQLLocalDB
SQL Server Express LocalDB 2019 is now install in Visual Studio 2022. You can download the preview version of Visual Studio 2022 from here: https://visualstudio.microsoft.com/vs/preview/
QUESTION
Consider the following dataframe
...ANSWER
Answered 2022-Feb-08 at 19:05A little bit over thinking since we need the multiple index dataframe
QUESTION
I have a simple query which is below:
...ANSWER
Answered 2022-Jan-29 at 15:15You can use window function SUM() to get the running total and exclude the rows that the running total exceeds 500:
QUESTION
I want to upload file to mediafire without API Delevoper(because when users use their accounts)
But I see mediafire api used Developer so i don't want to use it I want to somethings like it:
...ANSWER
Answered 2022-Jan-26 at 06:42You can't upload file to MediaFire without api,but i think it is source you want
QUESTION
I have a dataframe with a datetimeindex as shown with the format, the raw data is supposed to contains record every hourly for a year(each day having 24 record). Some hours/days are missing and not recorded in the data.
How can i get a list of all the missing datetimeindex hour.
Example: 01 hour is missing, how can i find and print out 2012-10-02 01:00:00
I'm currently able to get the missing days but unable to do so for the hour.
...ANSWER
Answered 2022-Jan-05 at 16:58Use set predicates to find missing index:
QUESTION
Is there any way of plotting 3D surface in R using plotly for time series. I have tried several ways of doing it and cannot get a meaningful representation.
Here is how my data look like:
...ANSWER
Answered 2021-Dec-13 at 09:01If you want the plot to take the row- and column names into account you'll need to pass them as arguments (see below).
PS: Next time please use dput(head(mdf)) to share your data.
QUESTION
I created a backup of a SQL Server database named mydb. I need to restore it programmatically with a C# code.
The restore must create a new database named mydbnew. I'm doing it using the Microsoft.SqlServer.Management.Smo library.
The code is this:
...ANSWER
Answered 2021-Nov-14 at 16:51Solved.
I changed the Relocate section with this version:
QUESTION
I am replicating the Successfactors Employee Central Data (including FO, MDF, BG elements and etc.) via OData API to local database for third party integration.
It is able to trace changed records by filtering last modify date. However, the deleted record is not able to capture from OData API. Hence I cannot delete the record in my local database when corresponding EC record is deleted.
Is there any way I can get the deleted records from the API or other sources? Thanks.
...ANSWER
Answered 2021-Nov-02 at 17:42OData API is not able to handle this task.
Extract from SF OData API doc:
Don't use our OData APIs when:
● Your system cannot consume either OData APIs or SOAP for an initial data load. In this case, you would go for Import/Export with a CSV. Automation via FTP would also be a possibility.
● You need employee replication field level delta, snapshot, or read modified employees only, then SOAP Compound Employee API is your tool of choice. You can find more information in the guide Implementing the Employee Central Compound Employee API.
● You only need to read data, then the SOAP Compound Employee API would also be your tool of choice.
However with SFAPI (SuccessFactors CompoundEmployee API) it's easy. SFAPI has a special parameter changedSegmentsOnly that does exactly just what you want, the API returns only changed segments with an action code not equal to NO_CHANGE in delta transmission.
You make a query, for example, for changed employee data:
QUESTION
...My Connection String in which error occurs
ANSWER
Answered 2021-Oct-26 at 18:18Adding to what @squillman suggested in the comment, you'll get that exact error with backup database [] to disk='yourpath.bak';. The connection database property isn't automatically set until the connection is opened so you need to move these lines after the Open:
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Install mdf
You can use mdf 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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