chengat1314 / qds-sdk-py

Python SDK for accessing Qubole Data Service

Qubole Data Service Python SDK

A Python module that provides the tools you need to authenticate with, and use the Qubole Data Service API.

Installation

From PyPI

The SDK is available on PyPI.

$ pip install qds-sdk

From source

• Download the source code:
  • Either clone the project: git clone [email protected]:qubole/qds-sdk-py.git
  • Or download one of the releases from https://github.com/qubole/qds-sdk-py/releases

• Run the following command (may need to do this as root):

  $ python setup.py install

• Alternatively, if you use virtualenv, you can do this:

  $ cd qds-sdk-py
  $ virtualenv venv
  $ source venv/bin/activate
  $ python setup.py install

This should place a command line utility qds.py somewhere in your path

$ which qds.py
/usr/bin/qds.py

CLI

qds.py allows running Hive, Hadoop, Pig, Presto and Shell commands against QDS. Users can run commands synchronously - or submit a command and check its status.

$ qds.py -h  # will print detailed usage

Examples:

1. run a hive query and print the results

   $ qds.py --token 'xxyyzz' hivecmd run --query "show tables"
   $ qds.py --token 'xxyyzz' hivecmd run --script_location /tmp/myquery
   $ qds.py --token 'xxyyzz' hivecmd run --script_location s3://my-qubole-location/myquery

2. pass in api token from bash environment variable

   $ export QDS_API_TOKEN=xxyyzz

3. run the example hadoop command

   $ qds.py hadoopcmd run streaming -files 's3n://paid-qubole/HadoopAPIExamples/WordCountPython/mapper.py,s3n://paid-qubole/HadoopAPIExamples/WordCountPython/reducer.py' -mapper mapper.py -reducer reducer.py -numReduceTasks 1 -input 's3n://paid-qubole/default-datasets/gutenberg' -output 's3n://example.bucket.com/wcout'

4. check the status of command # 12345678

   $ qds.py hivecmd check 12345678
   {"status": "done", ... }

5. If you are hitting api_url other than api.qubole.com, then you can pass it in command line as --url or set in as env variable

   $ qds.py --token 'xxyyzz' --url https://<env>.qubole.com/api hivecmd ...
   
   or
   
   $ export QDS_API_URL=https://<env>.qubole.com/api

SDK API

An example Python application needs to do the following:

1. Set the api_token and api_url (if api_url other than api.qubole.com):

   from qds_sdk.qubole import Qubole
   
   Qubole.configure(api_token='ksbdvcwdkjn123423')
   
   # or
   
   Qubole.configure(api_token='ksbdvcwdkjn123423', api_url='https://<env>.qubole.com/api')

2. Use the Command classes defined in commands.py to execute commands. To run Hive Command:

   from qds_sdk.commands import *
   
   hc=HiveCommand.create(query='show tables')
   print "Id: %s, Status: %s" % (str(hc.id), hc.status)

example/mr_1.py contains a Hadoop Streaming example

Reporting Bugs and Contributing Code

• Want to report a bug or request a feature? Please open an issue.
• Want to contribute? Fork the project and create a pull request with your changes against unreleased branch.