How to Build an ETL App for PayPal Data in Python with CData Connect AI

The rich ecosystem of Python modules lets you get to work quickly and integrate your systems more effectively. With the CData Connect AI Python SDK and the petl framework, you can build PayPal-connected applications and pipelines for extracting, transforming, and loading PayPal data. This article shows how to connect to Connect AI and use petl to extract, transform, and load PayPal data.

The Connect AI Python SDK (cdata-connect-ai) is a DB-API 2.0 (PEP 249) compliant client, so petl can read directly from the SDK connection with etl.fromdb. There is no driver to install per source: connect with a Personal Access Token and build your pipeline.

Connect to PayPal in Connect AI

CData Connect AI uses a straightforward, point-and-click interface to connect to data sources.

1. Log into Connect AI, click Sources, and then click Add Connection

2. Select "PayPal" from the Add Connection panel

3. Enter the necessary authentication properties to connect to PayPal.

   The provider surfaces tables from two PayPal APIs. The APIs use different authentication methods.

   • The REST API uses the OAuth standard. To authenticate to the REST API, set the OAuthClientId, OAuthClientSecret, and CallbackURL properties.
   • The Classic API requires Signature API credentials. To authenticate to the Classic API, obtain an API username, password, and signature.

   See the "Getting Started" chapter of the help documentation for a guide to obtaining the necessary API credentials.

   To select the API you want to work with, you can set the Schema property to REST or SOAP. By default the SOAP schema will be used.

   For testing purposes you can set UseSandbox to true and use sandbox credentials.

   
4. Click Save & Test
5. Navigate to the Permissions tab and update the user-based permissions.

Generate a Personal Access Token (PAT)

The Python SDK authenticates to Connect AI with your account email and a Personal Access Token (PAT). It is best practice to create a separate PAT for each application to maintain granularity of access.

1. Click the Gear icon () at the top right of the Connect AI app to open the Settings page.
2. On the Settings page, go to the Access Tokens section and click Create PAT.
3. Give the PAT a name and click Create.
4. The PAT is only visible at creation, so copy it and store it securely.

Install Required Modules

Install the SDK and the petl framework using the pip utility:

pip install cdata-connect-ai
pip install petl

Build an ETL App for PayPal Data in Python

Once the required modules are installed, you are ready to build the ETL app. Code snippets follow, but the full source code is available at the end of the article.

First, import the modules and connect to Connect AI with your account email and PAT:

import petl as etl
import cdata_connect_ai

conn = cdata_connect_ai.connect(
    username="[email protected]",
    password="<your_pat>",
)

Create a SQL Statement to Query PayPal

Use SQL to create a statement for querying PayPal. In this article, we read data from the Transactions entity. Identifiers are three-part: <Connection>.<Schema>.<Table>, where the connection name defaults to the source name (for example, PayPal1).

sql = (
    "SELECT Date, GrossAmount "
    "FROM [PayPal1].[PayPal].[Transactions] "
    "WHERE TransactionClass = 'Received'"
)

Extract, Transform, and Load the PayPal Data

With a connection and query in hand, use petl to extract, transform, and load the PayPal data. In this example, we extract PayPal data, sort the data by the GrossAmount column, and load the data into a CSV file.

table1 = etl.fromdb(conn, sql)

table2 = etl.sort(table1, 'GrossAmount')

etl.tocsv(table2, 'transactions_data.csv')

PayPal is a read-only source in Connect AI, so this pipeline can extract and transform PayPal data but not load rows back. Close the connection when the extract is complete:

conn.close()

With the CData Connect AI Python SDK, you can work with PayPal data just like you would with any database, including direct access to data in ETL packages like petl.

More Information and Free Trial

Now you can pipe live PayPal data through petl using the CData Connect AI Python SDK. For more information on connecting to PayPal (and hundreds of other data sources), visit the Connect AI page. Sign up for a free trial and start building data pipelines for live PayPal data in Python.

Full Source Code

import petl as etl
import cdata_connect_ai

conn = cdata_connect_ai.connect(
    username="[email protected]",
    password="<your_pat>",
)

sql = (
    "SELECT Date, GrossAmount "
    "FROM [PayPal1].[PayPal].[Transactions] "
    "WHERE TransactionClass = 'Received'"
)

table1 = etl.fromdb(conn, sql)

table2 = etl.sort(table1, 'GrossAmount')

etl.tocsv(table2, 'transactions_data.csv')
conn.close()