DStream | the simulation of algorithm of data mining | Data Mining library

by GeorryHuang Python Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | DStream Summary

DStream is a Python library typically used in Data Processing, Data Mining applications. DStream has no bugs, it has no vulnerabilities and it has low support. However DStream build file is not available. You can download it from GitHub.

the simulation of algorithm of data mining

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Support

DStream has a low active ecosystem.

It has 6 star(s) with 3 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

DStream has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of DStream is current.

Quality

DStream has no bugs reported.

Security

DStream has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

DStream does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

DStream releases are not available. You will need to build from source code and install.

DStream has no build file. You will be need to create the build yourself to build the component from source.

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DStream Key Features

No Key Features are available at this moment for DStream.

DStream Examples and Code Snippets

No Code Snippets are available at this moment for DStream.

Community Discussions

Trending Discussions on DStream

What's the right way to "log and skip" validated transformations in spark-streaming

Error 'dict' object is not callable in requesting data from tweepy API

How Can I Do Calculation in Bid And Ask Price which I am getting From Binance Websocket Java Script

Spark twitter streaming application Error on windows 10 when submitting python file to local server

How do I get the data of one row of a Structured Streaming Dataframe in pyspark?

How to get the length of the compressed data from DeflateStream?

RequestError(400, 'illegal_argument_exception', '[f756ea2593ee][172.18.0.4:9300][indices:data/write/update[s]]')

Must the Spark Streaming developer install Hadoop on his computer?

Exception in thread "JobGenerator" java.lang.NoSuchMethodError: 'scala.collection.mutable.ArrayOps scala.Predef$.refArrayOps(java.lang.Object[])'

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Product$class ( Java)

QUESTION

What's the right way to "log and skip" validated transformations in spark-streaming

Asked 2022-Mar-09 at 16:57

I have a spark-streaming application where I want to do some data transformations before my main operation, but the transformation involves some data validation.

When the validation fails, I want to log the failure cases, and then proceed on with the rest.

Currently, I have code like this:

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ANSWER

Answered 2022-Mar-09 at 16:28

I would say that the best way to tackle this is to take advantage that the stdlib flatMap accepts Option

Source https://stackoverflow.com/questions/71411554

QUESTION

Error 'dict' object is not callable in requesting data from tweepy API

Asked 2022-Jan-21 at 08:31

I was trying to retrieve tweets via tweepy API with the following code but the json dictionary that was retrieved had an error.

The Code:

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ANSWER

Answered 2022-Jan-20 at 22:41

In line no. 17 of the code you uploaded on pastebin, you load a JSON object msg, which is presumably a dict:

Source https://stackoverflow.com/questions/70649583

QUESTION

How Can I Do Calculation in Bid And Ask Price which I am getting From Binance Websocket Java Script

Asked 2022-Jan-02 at 11:53

I am Getting The Live Prices Of Btc Future Ask and Bid And Btc Spot Ask And Bid I want To Subtract Btc Spot Ask form Btc Future Bid i.e Spread. I converted them to Float As Well but In console i get NaN

...

ANSWER

Answered 2022-Jan-02 at 11:53

You are close, I made some adjustments to your snippet:

Source https://stackoverflow.com/questions/70555628

QUESTION

Spark twitter streaming application Error on windows 10 when submitting python file to local server

Asked 2021-Dec-08 at 15:11

I'm trying to run a streaming application that count tweets for specific users. The producer code:

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ANSWER

Answered 2021-Dec-08 at 15:11

I have solved this thanks to the hint given by @OneCricketeer. I upgraded python to 3.8 but faced another errors. Downgrading to python 3.7, that support Spark 2.4.8 or Spark 2.4.7 with Hadoop 2.7, and my world is shining again.

Source https://stackoverflow.com/questions/70245958

QUESTION

How do I get the data of one row of a Structured Streaming Dataframe in pyspark?

Asked 2021-Oct-23 at 09:24

I have a Kafka broker with a topic connected to Spark Structured Streaming. My topic sends data to my streaming dataframe, and I'd like to get information on each row for this topic (because I need to compare each row with another database).

If I could transform my batches into an RDD I could get each row easily.
I also saw something about DStreams but I don't know if with the last version f spark it still works.

Is DStream the answer to my problem or if there is any other solution to get my data row by row?

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ANSWER

Answered 2021-Oct-23 at 09:24

Read the data in spark streaming from kafka and write your custom row comparison in foreach writer of spark streaming . eg.

Source https://stackoverflow.com/questions/69584557

QUESTION

How to get the length of the compressed data from DeflateStream?

Asked 2021-Oct-10 at 09:02

The following is a simple compression method I wrote using DeflateStream:

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ANSWER

Answered 2021-Oct-10 at 08:57

MemoryStream.Position is 0 because data was not actually written there yet at the point you read Position. Instead, tell DeflateStream to leave underlying stream (MemoryStream) open, then dispose DeflateStream. At this point you can be sure it's done writing whatever it needs. Now you can read MemoryStream.Position to check how many bytes were written:

Source https://stackoverflow.com/questions/69513652

QUESTION

RequestError(400, 'illegal_argument_exception', '[f756ea2593ee][172.18.0.4:9300][indices:data/write/update[s]]')

Asked 2021-Sep-08 at 11:45

I am working with pyspark and elasticsearch (py library), and while updating one of the documents in ES I am getting the following error.

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ANSWER

Answered 2021-Sep-08 at 11:45

The problem is that you insert information in doc field which is convert into a properties since row variable is a dict of values and you try to update _source.Count instead of _source.doc.Count

body arg with doc field is only usefull for update with for example an upsert or a script when the document not exist.

So for example :

Source https://stackoverflow.com/questions/69098133

QUESTION

Must the Spark Streaming developer install Hadoop on his computer?

Asked 2021-Aug-11 at 09:32

I am trying to learn spark streaming, when my demo set Master is "local[2]", it is normal. But when I setMaster for the local cluster started in StandAlone mode, an error occurred: lost an executor 2 (already removed): Unable to create executor due to java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset.

It should be noted that I submitted the code in idea

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ANSWER

Answered 2021-Aug-11 at 09:32

It turns out, but I downloaded hadoop and set the value to HADOOP_HOME, after restarting the cluster, this error disappeared.

Source https://stackoverflow.com/questions/68679649

QUESTION

Exception in thread "JobGenerator" java.lang.NoSuchMethodError: 'scala.collection.mutable.ArrayOps scala.Predef$.refArrayOps(java.lang.Object[])'

Asked 2021-Jun-01 at 02:59

I got this error when trying to run Spark Streaming to read data from Kafka, I searched it on google and the answers didn't fix my error.

I fixed a bug here Exception in thread "main" java.lang.NoClassDefFoundError: scala/Product$class ( Java) with the answer of https://stackoverflow.com/users/9023547/chandan but then got this error again.

This is terminal when I run project :

...

ANSWER

Answered 2021-May-31 at 19:33

The answer is the same as before. Make all Spark and Scala versions the exact same. What's happening is kafka_2.13 depends on Scala 2.13, and the rest of your dependencies are 2.11... Spark 2.4 doesn't support Scala 2.13

You can more easily do this with Maven properties

Source https://stackoverflow.com/questions/67777305

QUESTION

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Product$class ( Java)

Asked 2021-May-31 at 14:39

I run a Spark Streaming program written in Java to read data from Kafka, but am getting this error, I tried to find out it might be because my version using scala or java is low. I used JDK version 15 and still got this error, can anyone help me to solve this error? Thank you.

This is terminal when i run project :

...

ANSWER

Answered 2021-May-31 at 09:34

Spark and Scala version mismatch is what causing this. If you use below set of dependencies this problem should be resolved.

One observation I have (which might not be 100% true as well) is if we have spark-core_2.11 (or any spark-xxxx_2.11) but scala-library version is 2.12.X I always ran into issues. Easy thing to memorize might be like if we have spark-xxxx_2.11 then use scala-library 2.11.X but not 2.12.X.

Please fix scala-reflect and scala-compile versions also to 2.11.X

Source https://stackoverflow.com/questions/67769876

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install DStream

You can download it from GitHub.
You can use DStream 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

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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