GridDB Python Client

Overview

GridDB Python Client is developed using GridDB C Client and SWIG (Simplified Wrapper and Interface Generator).

The new Python Client brings improved usability.

Main differences to the old Python Client are as follows:

• Put and get row data without C-based methods defined for each data-type
• Array type for GridDB is available
• Connectivity for Pandas library
• Error handling, date and time handling

Operating environment

Building of the library and execution of the sample programs have been checked in the following environment.

OS:              CentOS 6.7(x64)
SWIG:            3.0.12
GCC:             4.4.7
Python:          3.6
GridDB Server and C Client:   4.0 CE / 3.0 CE

QuickStart

Preparations

Install SWIG as below.

$ wget https://sourceforge.net/projects/pcre/files/pcre/8.39/pcre-8.39.tar.gz
$ tar xvfz pcre-8.39.tar.gz
$ cd pcre-8.39
$ ./configure
$ make
$ make install

$ wget https://prdownloads.sourceforge.net/swig/swig-3.0.12.tar.gz
$ tar xvfz swig-3.0.12.tar.gz
$ cd swig-3.0.12
$ ./configure
$ make
$ make install

Set CPATH and LIBRARY_PATH.

export CPATH=$CPATH:<Python header file directory path>

export LIBRARY_PATH=$LIBRARY_PATH:<C client library file directory path>

Build and Run

1. Execute the command on project directory.

$ make

2. Set the PYTHONPATH variable for griddb Python module files.

$ export PYTHONPATH=$PYTHONPATH:<installed directory path>

3. Import griddb_python in Python.

How to run sample

GridDB Server need to be started in advance.

1. Set LD_LIBRARY_PATH

    export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:<C client library file directory path>

2. The command to run sample

    $ sample/sample1.py <GridDB notification address> <GridDB notification port>
        <GridDB cluster name> <GridDB user> <GridDB password>
      -->Person: name=name02 status=False count=2 lob=[65, 66, 67, 68, 69, 70, 71, 72, 73, 74]

Function

(available)

• STRING, BOOL, BYTE, SHORT, INTEGER, LONG, FLOAT, DOUBLE, TIMESTAMP, BLOB type for GridDB
• put single row, get row with key
• normal query, aggregation with TQL
• Multi-Put/Get/Query (batch processing)
• Array type for GridDB

(not available)

• GEOMETRY type for GridDB
• timeseries compression
• timeseries-specific function like gsAggregateTimeSeries, gsQueryByTimeSeriesSampling in C client
• trigger, affinity

Please refer to the following files for more detailed information.

• Python Client API Reference

Note:

1. The current API might be changed in the next version. e.g. ContainerInfo
2. When you use GridDB V3.0 CE, please replace gridstore.h with gridstoreForV3.0.h on include/ folder and build sources.

Community

• Issues
  Use the GitHub issue function if you have any requests, questions, or bug reports.
• PullRequest
  Use the GitHub pull request function if you want to contribute code. You'll need to agree GridDB Contributor License Agreement(CLA_rev1.1.pdf). By using the GitHub pull request function, you shall be deemed to have agreed to GridDB Contributor License Agreement.

License

GridDB Python Client source license is Apache License, version 2.0.