Advanced Usage

Asynchronous Operations

You can opt-in to an asynchronous interface via the asynchronous keyword argument for methods that kick-off Unify operations.


operation = project.unified_dataset().refresh(asynchronous=True)
# do asynchronous stuff while operation is running
operation.wait() # hangs until operation finishes
assert op.succeeded()

Logging API calls

It can be useful (e.g. for debugging) to log the API calls made on your behalf by the Python Client.

You can set up HTTP-API-call logging on any client via standard Python logging mechanisms

from tamr_unify_client import Client
from unify_api_v1.auth import UsernamePasswordAuth
import logging

auth = UsernamePasswordAuth("username", "password")
unify = Client(auth)

# Reload the `logging` library since other libraries (like `requests`) already
# configure logging differently. See:
import imp

  level=logging.INFO, format="%(message)s", filename=log_path, filemode="w"
unify.logger = logging.getLogger(name)

By default, when logging is set up, the client will log {method} {url} : {response_status} for each API call.

You can customize this by passing in a value for log_entry:

def log_entry(method, url, response):
# custom logging function
# use the method, url, and response to construct the logged `str`
# e.g. for logging out machine-readable JSON:
import json
return json.dumps({
  "request": f"{method} {url}",
  "status": response.status_code,
  "json": response.json(),

# after configuring `unify.logger`
unify.log_entry = log_entry

Custom HTTP requests and Unversioned API Access

We encourage you to use the high-level, object-oriented interface offered by the Python Client. If you aren’t sure whether you need to send low-level HTTP requests, you probably don’t.

But sometimes it’s useful to directly send HTTP requests to Unify; for example, Unify has many APIs that are not covered by the higher-level interface (most of which are neither versioned nor supported). You can still call these endpoints using the Python Client, but you’ll need to work with raw Response objects.

Custom endpoint

The client exposes a request method with the same interface as requests.request:

# import Python Client library and configure your client

unify = Client(auth)
# do stuff with the `unify` client

# now I NEED to send a request to a specific endpoint
response = unify.request('GET', 'relative/path/to/resource')

This will send a request relative to the base_path registered with the client. If you provide an absolute path to the resource, the base_path will be ignored when composing the request:

# import Python Client library and configure your client

unify = Client(auth)

# request a resource outside the configured base_path
response = unify.request('GET', '/absolute/path/to/resource')

You can also use the get, post, put, delete convenience methods:

# e.g. `get` convenience method
response = unify.get('relative/path/to/resource')

Custom Host / Port / Base API path

If you need to repeatedly send requests to another port or base API path (i.e. not /api/versioned/v1/), you can simply instantiate a different client.

Then just call request as described above:

# import Python Client library and configure your client

unify = api.Client(auth)
# do stuff with the `unify` client

# now I NEED to send requests to a different host/port/base API path etc..
# NOTE: in this example, we reuse `auth` from the first client, but we could
# have made a new Authentication provider if this client needs it.
custom_client = api.Client(
response = custom_client.get('relative/path/to/resource')

One-off authenticated request

All of the Python Client Authentication providers adhere to the requests.auth.BaseAuth interface.

This means that you can pass in an Authentication provider directly to the requests library:

from tamr_unify_client.auth import UsernamePasswordAuth
import os
import requests

username = os.environ['UNIFY_USERNAME']
password =  os.environ['UNIFY_PASSWORD']
auth = UsernamePasswordAuth(username, password)

response = requests.request('GET', 'some/specific/endpoint', auth=auth)