Interactive Shell

Interactive shell is a convenient Python REPL interface that allows you to manage, query and modify data in your DEKER™ storage.

Note

DEKER™ shell is based on amazing ptpython - a better Python REPL

Features

• Autocompletion

• Syntax highlighting

• client and collections variables initialized at start

• Shortcut use function to change current collection

• Imported at start: numpy as np, datetime and all deker public classes

• Running asyncio loop (thus, enabling you to use async and await)

• All the ptpython features

Start

Once installed, open your terminal and run the shell providing path to DEKER™ storage via command line parameter (in this case it would be /tmp/deker-data):

deker file:///tmp/deker-data

Examples

Using global collection variable:

Creating a new collection:

REPL menu (called with F2):

Interface

Imported DEKER™ Classes

Basic storage access and management classes:

• Client

• Collection

• Array

• VArray

• Subset

• VSubset

Collection schema related:

• DimensionSchema

• TimeDimensionSchema

• ArraySchema

• VArraySchema

• AttributeSchema

• Scale

Physical storage (HDF5) level options:

• HDF5Options

• HDF5CompressionOpts

Preset Variables

• client: Client (registry of collections) instance, connected to the uri-database

• collections: list of Client collections names

• collection: global default collection variable, set by use(“coll_name”) method;

• np: numpy library

• datetime: datetime library

Functions

• use("collection_name"): gets collection from client and saves it to collection variable

• get_global_coll_variable(): returns collection global variable

Miscellaneous

You can also run an isolated Python script with:

deker my_python_script.py