py4j | Py4J enables Python programs to dynamically access

by bartdag Java Version: Current License: Non-SPDX

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

kandi X-RAY | py4j Summary

py4j is a Java library. py4j has no bugs, it has no vulnerabilities, it has build file available and it has high support. However py4j has a Non-SPDX License. You can download it from GitHub, Maven.

Py4J enables Python programs to dynamically access arbitrary Java objects

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Quality

Security

License

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Support

py4j has a highly active ecosystem.

It has 842 star(s) with 159 fork(s). There are 40 watchers for this library.

It had no major release in the last 6 months.

There are 125 open issues and 243 have been closed. On average issues are closed in 62 days. There are 6 open pull requests and 0 closed requests.

It has a negative sentiment in the developer community.

The latest version of py4j is current.

Quality

py4j has 0 bugs and 0 code smells.

Security

py4j has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

py4j code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

py4j has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

py4j releases are not available. You will need to build from source code and install.

Deployable package is available in Maven.

Build file is available. You can build the component from source.

It has 17736 lines of code, 1763 functions and 188 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed py4j and discovered the below as its top functions. This is intended to give you an instant insight into py4j implemented functionality, and help decide if they suit your requirements.

Executes a command
Gets all public static fields of the given class
Gets the names of all public fields of the specified object
Extract the names of a JVM view
Decodes a base64 encoded byte array
Decodes a base64 encoded char array
Decodes a base64 string
Starts a local Gateway server
Encodes a raw byte array into a base64 string
Executes the given command
Build the internal representation of a class
Execute a command
If client connection should retry
Clear the imports
Init commands class
Init commands
Executes a command from the given reader
Executes a command
Start communication channel
Executes the command
Executes the command from the given command
Get a client connection
Shuts down the CallbackClient
Invoke a proxy method
Executes the command
Send the finalize command

Get all kandi verified functions for this library.

py4j Key Features

No Key Features are available at this moment for py4j.

py4j Examples and Code Snippets

No Code Snippets are available at this moment for py4j.

Community Discussions

Trending Discussions on py4j

How to read a csv file from s3 bucket using pyspark

Errors initialising PySpark installed using pip on Mac

Multi-processing in Azure Databricks

Use csv from GitHub in PySpark

Getting "An error occurred while calling o58.csv" error while writing a spark dataframe into a csv file

pyspark- snowflake unable to load data from table

StructuredStreaming withWatermark - TypeError: 'module' object is not callable

Spring Boot Logging to a File

GCP Dataproc - Failed to construct kafka consumer, Failed to load SSL keystore dataproc.jks of type JKS

GCP dataproc - java.lang.NoClassDefFoundError: org/apache/kafka/common/serialization/ByteArraySerializer

QUESTION

How to read a csv file from s3 bucket using pyspark

Asked 2022-Mar-16 at 22:53

I'm using Apache Spark 3.1.0 with Python 3.9.6. I'm trying to read csv file from AWS S3 bucket something like this:

...

ANSWER

Answered 2021-Aug-25 at 11:11

You need to use hadoop-aws version 3.2.0 for spark 3. In --packages specifying hadoop-aws library is enough to read files from S3.

Source https://stackoverflow.com/questions/68921060

QUESTION

Errors initialising PySpark installed using pip on Mac

Asked 2022-Mar-11 at 02:43

I'm trying to get started with pyspark, but having some trouble. I have python 3.10 installed and an M1 MacBook Pro. I installed pyspark using the command:

...

ANSWER

Answered 2021-Dec-02 at 17:46

You need to setup JAVA_HOME and SPARK_DIST_CLASSPATH as well. You can download Hadoop from the main website https://hadoop.apache.org/releases.html

Source https://stackoverflow.com/questions/70203498

QUESTION

Multi-processing in Azure Databricks

Asked 2022-Mar-01 at 12:19

I have been tasked lately, to ingest JSON responses onto Databricks Delta-lake. I have to hit the REST API endpoint URL 6500 times with different parameters and pull the responses.

I have tried two modules, ThreadPool and Pool from the multiprocessing library, to make each execution a little quicker.

ThreadPool:

How to choose the number of threads for ThreadPool, when the Azure Databricks cluster is set to autoscale from 2 to 13 worker nodes?

Right now, I've set n_pool = multiprocessing.cpu_count(), will it make any difference, if the cluster auto-scales?

Pool

When I use Pool to use processors instead of threads. I see the following errors randomly on each execution. Well, I understand from the error that Spark Session/Conf is missing and I need to set it from each process. But I am on Databricks with default spark session enabled, then why do I see these errors.

...

ANSWER

Answered 2022-Feb-28 at 08:56

You can try following way to resolve

Source https://stackoverflow.com/questions/71094840

QUESTION

Use csv from GitHub in PySpark

Asked 2022-Feb-24 at 12:33

Usually, to read a local .csv file I use this:

...

ANSWER

Answered 2022-Feb-24 at 12:33

It's not possible to access external data from driver. There are some workarounds like simple using pandas:

Source https://stackoverflow.com/questions/71251538

QUESTION

Getting "An error occurred while calling o58.csv" error while writing a spark dataframe into a csv file

Asked 2022-Feb-23 at 20:04

After using df.write.csv to try to export my spark dataframe into a csv file, I get the following error message:

...

ANSWER

Answered 2021-Dec-01 at 13:43

The issue was with the Java SDK (or JDK) version. Currently pyspark only supports JDK versions 8 and 11 (the most recent one is 17) To download the legacy versions of JDK, head to https://www.oracle.com/br/java/technologies/javase/jdk11-archive-downloads.html and download the version 11 (note: you will need to provide a valid e-mail and password to create an Oracle account)

Source https://stackoverflow.com/questions/70100519

QUESTION

pyspark- snowflake unable to load data from table

Asked 2022-Feb-19 at 15:03

i am trying to query data from snowflake using pyspark in glue with below code

...

ANSWER

Answered 2022-Feb-19 at 15:03

Using:

Source https://stackoverflow.com/questions/71185491

QUESTION

StructuredStreaming withWatermark - TypeError: 'module' object is not callable

Asked 2022-Feb-17 at 03:46

I have a Structured Streaming pyspark program running on GCP Dataproc, which reads data from Kafka, and does some data massaging, and aggregation. I'm trying to use withWatermark(), and it is giving error.

Here is the code :

...

ANSWER

Answered 2022-Feb-17 at 03:46

As @ewertonvsilva mentioned, this was related to import error. specifically ->

Source https://stackoverflow.com/questions/71137296

QUESTION

Spring Boot Logging to a File

Asked 2022-Feb-16 at 14:49

In my application config i have defined the following properties:

...

ANSWER

Answered 2022-Feb-16 at 13:12

Acording to this answer: https://stackoverflow.com/a/51236918/16651073 tomcat falls back to default logging if it can resolve the location

Can you try to save the properties without the spaces.

Like this: logging.file.name=application.logs

Source https://stackoverflow.com/questions/71142413

QUESTION

GCP Dataproc - Failed to construct kafka consumer, Failed to load SSL keystore dataproc.jks of type JKS

Asked 2022-Feb-10 at 05:16

I'm trying to run a Structured Streaming program on GCP Dataproc, which accesses the data from Kafka and prints it.

Access to Kafka is using SSL, and the truststore and keystore files are stored in buckets. I'm using Google Storage API to access the bucket, and store the file in the current working directory. The truststore and keystores are passed onto the Kafka Consumer/Producer. However - i'm getting an error

Command :

...

ANSWER

Answered 2022-Feb-03 at 17:15

I would add the following option if you want to use jks

Source https://stackoverflow.com/questions/70964198

QUESTION

GCP dataproc - java.lang.NoClassDefFoundError: org/apache/kafka/common/serialization/ByteArraySerializer

Asked 2022-Feb-10 at 04:07

i'm trying to run a StructuredStreaming job on GCP DataProc, which reads from Kafka nd prints out the values. The code is giving error -> java.lang.NoClassDefFoundError: org/apache/kafka/common/serialization/ByteArraySerializer

Here is the code:

...

ANSWER

Answered 2022-Feb-02 at 08:39

Please have a look at the official deployment guideline here: https://spark.apache.org/docs/latest/structured-streaming-kafka-integration.html#deploying

Extracting the important part:

Source https://stackoverflow.com/questions/70951195

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

Vulnerabilities

No vulnerabilities reported

Install py4j

You can download it from GitHub, Maven.
You can use py4j like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the py4j component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

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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