testbed/TileDB-Inc__TileDB-Py/examples/string_dimension_labels.py

# string_dimension_label.py
#
# LICENSE
#
# The MIT License
#
# Copyright (c) 2023 TileDB, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# DESCRIPTION
#
# Please refer to the TileDB and TileDB-Py documentation for more information:
#   https://docs.tiledb.com/main/how-to
#   https://tiledb-inc-tiledb.readthedocs-hosted.com/projects/tiledb-py/en/stable/python-api.html
#
# When run, this program will create a simple 2D dense array with a string dimension
# dimension on the column dimension, and read a slice back with the dimension label.
#

import numpy as np

import tiledb


def create_array(uri: str):
    """Create array schema with a dimension label on the columns"""
    dim1 = tiledb.Dim("row", domain=(1, 5))
    dim2 = tiledb.Dim("column", domain=(1, 5))
    dom = tiledb.Domain(dim1, dim2)
    att = tiledb.Attr("a1", dtype=np.int64)
    dim_labels = {1: {"name": dim2.create_label_schema("increasing", "ascii")}}
    schema = tiledb.ArraySchema(domain=dom, attrs=(att,), dim_labels=dim_labels)
    tiledb.Array.create(uri, schema)


def write_array(uri: str):
    """Write attribute and label data to the array"""
    a1_data = np.reshape(np.arange(1, 26), (5, 5))
    label_data = np.array(["alpha", "beta", "gamma", "kappa", "omega"])
    with tiledb.open(uri, "w") as array:
        array[:, :] = {"a1": a1_data, "name": label_data}


def read_array(uri: str):
    """Read the array from the dimension label"""

    with tiledb.open(uri, "r") as array:
        data = array.label_index(["name"])[1, "beta":"kappa"]
        print(
            "Reading array on [[1, 'beta':'kappa']] with label 'name' on dimension 'col'"
        )
        for name, value in data.items():
            print(f"  '{name}'={value}")


if __name__ == "__main__":
    # Name of the array to create.
    ARRAY_NAME = "string_dimension_labels"

    LIBVERSION = tiledb.libtiledb.version()

    if LIBVERSION[0] == 2 and LIBVERSION[1] < 15:
        print(
            f"Dimension labels requires libtiledb version >= 2.15.0. Current version is"
            f" {LIBVERSION[0]}.{LIBVERSION[1]}.{LIBVERSION[2]}"
        )

    else:
        # Only create and write to the array if it doesn't already exist.
        if tiledb.object_type(ARRAY_NAME) != "array":
            create_array(ARRAY_NAME)
            write_array(ARRAY_NAME)

        # Read from the array and print output.
        read_array(ARRAY_NAME)