python-odata

A simple library for read/write access to OData services.

• Supports OData version 4.0
• Requires JSON format support from the service
• Should work on both Python 2.x and 3.x

Documentation

Available on readthedocs.org

Dependencies

• requests >= 2.0
• python-dateutil
• rich >= 13.3.1

Demo

Northwind ODATA service

Reading data from the Northwind service.

import requests
from datetime import datetime

# you can only import this on the second run, the first run will create the package
# import generated 
from odata import ODataService
session = requests.Session()

url = 'http://services.odata.org/V4/Northwind/Northwind.svc/'
service = ODataService(
    url="http://services.odata.org/V4/Northwind/Northwind.svc/",
    session=session,
    base=generated.northwind.ReflectionBase,
    reflect_entities=True,
    reflect_output_package="generated.northwind")
OrderDetails = generated.northwind.Order_Details

q = service.query(generated.northwind.Customers)
q = q.filter(generated.northwind.Customers.ContactTitle.startswith('Sales'))
q = q.filter(generated.northwind.Customers.PostalCode == '68306')
data = q.first()

query = service.query(OrderDetails)
values = query.all()
values = query \
    .filter((OrderDetails.Order.Employee.HomePhone.contains("555")) | (OrderDetails.Order.Employee.City == "London")) \
    .filter(OrderDetails.Order.Employee.FirstName.lacks("Steven")) \
    .filter(OrderDetails.Order.OrderDate >= datetime(year=1990, month=5, day=1, hour=10, minute=10, second=59, tzinfo=pytz.UTC))\
    .expand(OrderDetails.Order, OrderDetails.Order.Employee) \
    .order_by(OrderDetails.Order.ShipCountry.asc()) \
    .limit(10) \
    .all()
for order_details in values:
    print(f"Order {order_details.OrderID}")
    service.values(order_details)
    service.values(order_details.Order)
    service.values(order_details.Order.Employee)

import datetime

Order = Service.entities['Order']
Employee = Service.entities['Employee']

empl = Service.query(Employee).first()

query = Service.query(Order)
query = query.filter(Order.ShipCity == 'Berlin')

for order in query:
    order.ShippedDate = datetime.datetime.utcnow() 
    order.Employee = empl
    Service.save(order)

TripPin ODATA service (v4)

OData V4 example with Enums.

import logging

import requests
import rich

# comment on first run so you get the generated package
import generated.trippin
from odata import ODataService

requests.packages.urllib3.disable_warnings()


def test_trippin(console):
    proxy = {'http': '', 'https': ''}

    session = requests.Session()

    session.trust_env = False
    session.verify = False
    session.proxies.update(proxy)

    service = ODataService(
        url="https://services.odata.org/v4/TripPinServiceRW",
        session=session,
        #base=generated.trippin.ReflectionBase,  # comment on first run
        #reflect_entities=True,
        reflect_output_package="generated.trippin")
    People = generated.trippin.People

    q = service.query(People)

    values = q.all()
    for value in values:
        console.rule(f"People {value.FirstName} {value.LastName}")
        service.values(value)


if __name__ == "__main__":
    logging.basicConfig(level="DEBUG")
    console = rich.console.Console()
    test_trippin(console)

Writing changes. Note that the real Northwind service is read-only and the data modifications do not work against it.