nurtelecom-gras-library 2.3.1

Official Nurtelecom DSML library

nurtelecom_gras_library

Official Python toolkit for the NurTelecom GRAS data team. It bundles the everyday building blocks for data work into one package:

• Oracle access — query into pandas, bulk insert/upsert, export to file
• Geospatial — read WKT/SDO geometries straight into a GeoDataFrame
• Secrets — pull credentials from HashiCorp Vault
• SQL generation — build CREATE TABLE DDL (with partitioning) from a DataFrame
• Notifications — Telegram, SMS, and e-mail (plain + HTML)
• Jira — create/update issues and Service Desk requests
• Tableau — export views to PNG / PDF / CSV / XLSX

Installation

pip install nurtelecom_gras_library

Spatial features (OracleGeoDataImporter, voronoi_split) need extra, heavier dependencies. Install them only if you need them:

pip install nurtelecom_gras_library[geo]      # geopandas, shapely, scipy
pip install nurtelecom_gras_library[smb]      # smbprotocol (network shares)
pip install nurtelecom_gras_library[tableau]  # tableauserverclient

The core install does not pull in geopandas/shapely/tableauserverclient; you'll get a clear error pointing you to the right extra if you use a feature that needs one.

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Quick start

A complete, runnable version of the flow below lives in example.py — copy it and fill in your details.

import logging
from nurtelecom_gras_library import (
    get_db_connection,
    get_all_cred_dict,
    make_table_query_from_pandas,
)

# Optional: the library logs (doesn't print) — show INFO to see progress.
logging.basicConfig(level=logging.INFO)

# 1. Pull credentials from Vault. AppRole (role_id + secret_id) is recommended;
#    any argument left out is read from the matching env var (see Credentials).
all_cred_dict = get_all_cred_dict(
    vault_url="https://vault.example.com",
    role_id="your-approle-role-id",
    secret_id="your-approle-secret-id",
    path_to_secret="path/to/secret",
    mount_point="your_kv_mount",
)

# 2. Open a connection for a given user + database (context manager closes it).
with get_db_connection("my_login", "DWH", all_cred_dict) as db:
    # 3. Query into a pandas DataFrame.
    df = db.get_data("SELECT 1 AS one FROM dual")

    # 4. Generate and run a CREATE TABLE from the DataFrame, then load it.
    ddl = make_table_query_from_pandas(df=df, table_name="my_new_table")
    db.execute(ddl)
    db.upload_pandas_df_to_oracle(df, "my_new_table")

---

Database access (Oracle)

get_db_connection(user, database, all_cred_dict=None, geodata=False) returns an OracleDataRetriever (or an OracleGeoDataImporter when geodata=True). It looks up {USER}_{DATABASE}, {DATABASE}_IP, {DATABASE}_SERVICE_NAME, and {DATABASE}_PORT from the credentials dict. You can also instantiate the class directly:

from nurtelecom_gras_library import OracleDataRetriever

db = OracleDataRetriever(
    user="user", password="pass",
    host="192.168.1.1", port="1521", service_name="DWH",
)

Connections are context managers — use with to release the engine/pool automatically (or call db.close() yourself):

with get_db_connection("my_login", "DWH", all_cred_dict) as db:
    df = db.get_data("SELECT 1 FROM dual")

Oracle Client / Thick mode

On import the library tries to initialize Thick mode (it loads the Oracle Client libraries), falling back silently to Thin mode if the client isn't found. Thick mode is required for accounts using older password verifiers — otherwise you'll see DPY-3015: password verifier type ... not supported ... in thin mode.

If the client isn't on the default loader path you'll get DPI-1047: Cannot locate ... Oracle Client library. Point the library at it via either:

export ORACLE_CLIENT_LIB_DIR=/opt/oracle/instantclient_21_13   # used on import
# or set LD_LIBRARY_PATH before launching Python

from nurtelecom_gras_library import enable_thick_mode
enable_thick_mode(lib_dir="/opt/oracle/instantclient_21_13")    # explicit

Set NURTELECOM_THICK_MODE=0 to skip the auto-init and stay in Thin mode.

Reading

df = db.get_data("SELECT * FROM my_table", remove_na=True, show_logs=True)

Writing

# Bulk insert (batched executemany)
db.upload_pandas_df_to_oracle(df, table_name="my_table")

# Parallel bulk insert using an internal connection pool
db.upload_pandas_df_to_oracle_parallel(df, "my_table", num_threads=4, batch_size=10000)

# MERGE / upsert on key columns (optionally summing some columns)
db.upsert_from_pandas_df(
    df, table_name="my_table",
    list_of_keys=["id"],
    sum_update_columns=["counter"],
)

Exporting & maintenance

db.export_to_file("SELECT * FROM big_table", "out.csv")          # chunked via pandas
db.export_to_file_oracle("SELECT * FROM big_table", "out.csv")   # chunked via oracledb
db.truncate_table("my_table")
db.execute("BEGIN my_proc(); END;")

Geospatial

OracleGeoDataImporter (returned by get_db_connection(..., geodata=True)) parses geometry columns into a geopandas.GeoDataFrame. Have your query return geometry as a standard interchange format. WKB (binary) is preferred — compact, fast, and lossless:

SELECT SDO_UTIL.TO_WKBGEOMETRY(SDO_CS.TRANSFORM(t.geometry, 4326)) AS geometry
FROM my_geo_table t

WKT (text) is also supported:

SELECT SDO_UTIL.TO_WKTGEOMETRY(SDO_CS.TRANSFORM(t.geometry, 4326)) AS geometry
FROM my_geo_table t

# geom_format defaults to "auto" (detects WKB bytes vs WKT text per value);
# pass "wkb" or "wkt" to force one.
gdf = geo_db.get_data(query, geom_columns_list=["geometry"], crid="EPSG:4326")

NULL geometries become None, CLOB/BLOB columns are read correctly, and the first column in geom_columns_list is set as the active geometry (so it can be named anything).

Geometry can also be written back via the geometry_cols/srid arguments on the upload methods (using SDO_GEOMETRY).

---

SQL generation from DataFrames

from nurtelecom_gras_library import make_table_query_from_pandas

ddl = make_table_query_from_pandas(
    df,
    table_name="events",
    list_num_columns=["amount"],
    list_date_columns=["event_date"],
    list_clob_columns=["payload"],
    # Optional partitioning
    partition_column="event_date",
    partition_type="RANGE",
    partition_granularity="MONTH",
    partition_start="2024-01-01",
    partition_end="2025-01-01",
)

Supports RANGE (manual or interval), LIST, and HASH partitioning.

---

Credentials (Vault)

from nurtelecom_gras_library import get_all_cred_dict

# AppRole auth (recommended): role_id + secret_id
creds = get_all_cred_dict(
    vault_url=url, role_id="your-approle-role-id", secret_id="your-approle-secret-id",
    path_to_secret="path/to/secret", mount_point="your_kv_mount",
)

# Token auth
creds = get_all_cred_dict(vault_url=url, vault_token=token, path_to_secret=..., mount_point=...)

AppRole takes precedence when both role_id and secret_id are supplied. Values are used as-is (raw) — vault_url must include the scheme (https://…). If any argument is omitted, it is read verbatim from the corresponding environment variable: VAULT_LINK_URL, VAULT_TKN, VAULT_ROLE_ID, VAULT_SECRET_ID, PATH_TO_SECRET_VLT, MOUNT_POINT_VLT. The function raises ValueError if no credentials are given and RuntimeError if Vault auth fails. Helpers pass_encoder / pass_decoder still provide base64 encode/decode if you want them (note: base64 is encoding, not encryption).

---

Notifications

Telegram

from nurtelecom_gras_library import (
    send_msg_via_telegram, send_photo_via_telegram, send_file_via_telegram,
)

send_msg_via_telegram(token, chat_id, "Hello")
send_photo_via_telegram(token, chat_id, "chart.png", captions="Daily chart")
send_file_via_telegram(token, chat_id, "report.xlsx")

send_telegram_msg(payload, receiver, db) and send_sms(payload, receiver, db) route messages through Oracle stored procedures using a DB connection.

E-mail

from nurtelecom_gras_library import send_email, send_email_html

# Plain text + attachments (single path, or a whole directory)
send_email(
    send_to=["[e-mail]", "[e-mail]"], send_from="[e-mail]",
    subject="Report", host="smtp.host", content="See attached",
    file_to_attach="report.pdf", cc_to="[e-mail]",
)

# HTML body with a plain-text fallback
send_email_html(
    send_to="[e-mail]", send_from="[e-mail]", subject="Report",
    host="smtp.host", html="<h1>Hi</h1>", text="Hi",
)

send_to/cc_to accept either a string or a list/tuple of addresses.

---

Jira

from nurtelecom_gras_library import JiraClient

jira = JiraClient(base_url="https://jira.example", token="PAT")
# or: JiraClient(base_url=..., username=..., password=...)

# Standard projects
key = jira.create_project_issue("OPTM", "Task", {"summary": "New task"})
jira.update_project_issue_fields(key, {"description": "..."})
jira.add_comment_to_issue(key, "Working on it")
jira.add_attachment_to_issue(key, "log.txt")
df = jira.get_issues_df(jira.fetch_all_issues("project = OPTM"), field_map={"Key": "Key", "summary": None})

# Service Desk
req = jira.create_service_desk_request(service_desk_id, request_type_id, fields)
jira.add_comment_to_request(req, "Update", public=True)

Includes discovery helpers: list_available_projects, list_issue_types_for_project, get_project_issue_fields, get_request_types, get_request_fields, check_portal_access.

---

Tableau

from nurtelecom_gras_library import TableauServerManager

tab = TableauServerManager(login="user", password="pass", host="https://tableau.host")

# Export a view directly from its browser URL (PNG/PDF/CSV/XLSX).
# Resolves the workbook from the URL slug — no full-site enumeration needed.
status, file_path = tab.export_view(
    "https://tableau.host/#/views/MyWorkbook/MyView", format="png",
)

The server REST API version is auto-detected by default; pin it with server_version="3.9" if needed. Exported files are written to an exported_files/ folder.

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Utilities

Function	Purpose
measure_time	Decorator that prints a function's runtime
get_list_of_objects(path, is_dir=False)	List files (or dirs) in a path
get_a_copy(src, dst)	Copy a file
value_extractor(pattern, path)	Extract a numeric value from a text file
merge_clob_maker(string, num_of_charr=25000)	Split a long string into TO_CLOB(...) chunks for Oracle
voronoi_split(poly, coords, ...)	Voronoi partition of a polygon (requires [geo])
register_smb_session(user, password, server)	Open an SMB session (requires [smb])

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License

MIT License — see LICENSE.

Contact

For questions or support, contact the NurTelecom GRAS team.