Checkout.com Python SDK

Getting started

Requirements

• Python 3.10 or higher
• pip

Installation

pip install checkout-sdk

For a specific version:

pip install checkout-sdk==<version>

Version 3.0.0 is here!

We improved the initialization of SDK making it easier to understand the available options.
Now NAS accounts are the default instance for the SDK and ABC structure was moved to a previous prefixes.
If you have been using this SDK before, you may find the following important changes:

• Imports: if you used to import checkout_sdk.payments.payments now use checkout_sdk.payments.payments_previous
• Marketplace module was moved to Accounts module, same for classes and references.
• In most cases, IDE can help you determine from where to import, but if you’re still having issues don't hesitate to open a ticket.

🚀 Please check in GitHub releases for all the versions available.

📖 Checkout our official documentation.

• Official Docs (Default)
• Official Docs (Previous)

📚 Check out our official API documentation guide, where you can also find more usage examples.

• API Reference (Default)
• API Reference (Previous)

How to use the SDK

This SDK can be used with two different pair of API keys provided by Checkout. However, using different API keys imply using specific API features. Please find in the table below the types of keys that can be used within this SDK.

Account System	Public Key (example)	Secret Key (example)
Default	pk_nruiensgius784thg489hio3481	sk_nguierhg984hg4nig489gh48931
Previous	pk_gdf78gdg-rf56-3fgr-34rf-5435g456gg6y	sk_hg5643g6-4r5t-gt67-ht6t-5467567g6f56

Note: sandbox keys have a sbox_ or test_ identifier, for Default and Previous accounts respectively.

If you don't have your own API keys, you can sign up for a test account here.

PLEASE NEVER SHARE OR PUBLISH YOUR CHECKOUT CREDENTIALS.

Default

Default keys client instantiation can be done as follows:

fromcheckout_sdk.checkout_sdkimportCheckoutSdkfromcheckout_sdk.environmentimportEnvironmentdefdefault():
# public key is optional, only required for operations related with tokenscheckout_api=CheckoutSdk
.builder()
.secret_key('secret_key')
.public_key('public_key') # optional, only required for operations related with tokens
.environment(Environment.sandbox()) # or production()
.environment_subdomain("subdomain") # optional, Merchant-specific DNS name
.build()
payments_client=checkout_api.paymentspayments_client.refund_payment('payment_id')

Default OAuth

The SDK supports client credentials OAuth, when initialized as follows:

fromcheckout_sdk.checkout_sdkimportCheckoutSdkfromcheckout_sdk.environmentimportEnvironmentfromcheckout_sdk.oauth_scopesimportOAuthScopesdefoauth():
checkout_api=CheckoutSdk
.builder()
.oauth()
.client_credentials(client_id='client_id', client_secret='client_secret')
.environment(Environment.sandbox()) # or production()
.environment_subdomain("subdomain") # optional, Merchant-specific DNS name
.scopes([OAuthScopes.GATEWAY_PAYMENT_REFUNDS, OAuthScopes.FILES]) # optional, array of scopes
.build()
payments_client=checkout_api.paymentspayments_client.refund_payment('payment_id')

Previous

If your pair of keys matches the Previous type, this is how the SDK should be used:

fromcheckout_sdk.checkout_sdkimportCheckoutSdkfromcheckout_sdk.environmentimportEnvironmentdefprevious():
# public key is optional, only required for operations related with tokenscheckout_api=CheckoutSdk
.builder()
.previous()
.secret_key('secret_key')
.public_key('public_key') # optional, only required for operations related with tokens
.environment(Environment.sandbox()) # or production()
.environment_subdomain("subdomain") # optional, Merchant-specific DNS name
.build()
payments_client=checkout_api.paymentspayments_client.refund_payment('payment_id')

Logging

Checkout SDK custom logger can be enabled and configured through Python's logging module:

importlogginglogging.basicConfig()
logging.getLogger('checkout').setLevel(logging.INFO)

HttpClient

Checkout SDK uses requests library to perform http operations, and you can provide your own custom http client implementing HttpClientBuilderInterface

importrequestsfromrequestsimportSessionimportcheckout_sdkfromcheckout_sdk.checkout_sdkimportCheckoutSdkfromcheckout_sdk.environmentimportEnvironmentfromcheckout_sdk.oauth_scopesimportOAuthScopesfromcheckout_sdk.http_client_interfaceimportHttpClientBuilderInterfaceclassCustomHttpClientBuilder(HttpClientBuilderInterface):
defget_client(self) ->Session:
session=requests.Session()
session.max_redirects=5returnsessiondefoauth():
checkout_api=CheckoutSdk
.builder()
.oauth()
.client_credentials(client_id='client_id', client_secret='client_secret')
.environment(Environment.sandbox()) # or production()
.environment_subdomain("subdomain") # optional, Merchant-specific DNS name
.http_client_builder(CustomHttpClientBuilder()) # optional
.scopes([OAuthScopes.GATEWAY_PAYMENT_REFUNDS, OAuthScopes.FILES]) # optional, array of scopes
.build()
payments_client=checkout_api.paymentspayments_client.refund_payment('payment_id')

Exception handling

All the API responses that do not fall in the 2** status codes will cause a CheckoutApiException. The exception encapsulates the http_metadata, request_id, error_type, and a list of error_details, if available.

try:
checkout_api.customers.get("customer_id")
exceptCheckoutApiExceptionaserr:
http_status_code=err.http_metadata.status_coderequest_id=err.request_iderror_type=err.error_typeerror_details=err.error_details

Building from source

Prerequisites

• Python 3.10 or higher
• pip (latest version)

Setup Development Environment

1. Clone the repository

   git clone https://github.com/checkout/checkout-sdk-python.git
   cd checkout-sdk-python

2. Create and activate virtual environment

   python3.10 -m venv .venv
   source .venv/bin/activate # On Windows: .venv\Scripts\activate

3. Install dependencies

   pip install --upgrade pip
   pip install -r requirements-dev.txt

4. Install pre-commit hooks (optional but recommended)

   pre-commit install

Running Tests

# Run all tests
python -m pytest --import-mode=append --runxfail tests/
# Run specific test file
python -m pytest tests/payments/payments_client_test.py -v
# Run with coverage
python -m pytest --cov=checkout_sdk tests/

Code Quality

The project uses flake8 and pylint for code quality checks:

# Run flake8
flake8 checkout_sdk tests --count --max-complexity=10 --max-line-length=127 --statistics
# Run pylint
pylint checkout_sdk

If you installed pre-commit hooks, these checks will run automatically before each commit.

Environment Variables

The execution of integration tests require the following environment variables set in your system:

• For Default account systems: CHECKOUT_DEFAULT_PUBLIC_KEY & CHECKOUT_DEFAULT_SECRET_KEY
• For OAuth account systems: CHECKOUT_DEFAULT_OAUTH_CLIENT_ID & CHECKOUT_DEFAULT_OAUTH_CLIENT_SECRET
• For Previous account systems: CHECKOUT_PREVIOUS_PUBLIC_KEY & CHECKOUT_PREVIOUS_SECRET_KEY
• Processing channel: CHECKOUT_PROCESSING_CHANNEL_ID

Code of Conduct

Please refer to Code of Conduct

Licensing

MIT