File size: 3,421 Bytes
2c3c408 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | # 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)
|