Braintree Python SDK

PayPal's Braintree payment gateway Python SDK. Current version: 4.42.0 (Mar 2026). Stable API — no major breaking changes from v3 to v4 for Python. SSL certificate update required: Braintree updated root SSL cert April 2024 — SDKs older than ~4.33 will fail after March 2026. Three-step flow: generate client token server-side → collect payment method nonce client-side → create transaction server-side. Amount as string. submit_for_settlement must be True to actually capture funds.