Lettr for Python SDK
The official Python SDK for the Lettr Email API. A clean, typed client for emails, templates, domains, webhooks, audience, and campaigns — methods raise typed exceptions on failure.
Installation
pip install lettr
Quick Start
import lettr
client = lettr.Lettr("lttr_your_api_key")
response = client.emails.send(
from_email="you@example.com",
to=["user@example.com"],
subject="Hello from Lettr!",
html="<h1>Welcome!</h1>",
)
print(response.request_id)
Use the client as a context manager to close the connection pool automatically:
with lettr.Lettr("lttr_your_api_key") as client:
client.emails.send(from_email="you@example.com", to=["user@example.com"],
subject="Hello!", html="<p>Hello!</p>")
Error Handling
The SDK raises typed exceptions — all subclasses of lettr.LettrError:
try:
client.emails.send(from_email="you@example.com", to=["user@example.com"],
subject="Hello", html="<p>Hello!</p>")
except lettr.ValidationError as e:
print(e.message, e.errors)
except lettr.LettrError as e:
print(e.message)
See Error Handling for the full exception hierarchy.
Documentation
Full guides for every resource, with complete request/response details, live in the docs:
📚 docs.lettr.com/quickstart/python
| Topic | Guide |
|---|---|
| Install, client setup, sending | Quickstart |
| Async, Django, error handling, type hints | Advanced |
| Manage Lettr templates & merge tags | Templates |
| Add, verify, and manage sending domains | Domains |
| Webhook endpoints for delivery & engagement events | Webhooks |
| Lists, contacts, topics, properties, segments | Audience |
| List, send, and schedule campaigns | Campaigns |
| Flask & FastAPI integration | Flask · FastAPI |
| Endpoint reference (params & schemas) | API Reference |
Requirements
- Python 3.8+
- httpx (installed automatically)
License
MIT
1 maintainer
Release files for lettr 1.6.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| lettr-1.6.0.tar.gz | 56.1 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| lettr-1.6.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 95.0 kB
Release files / lettr-1.6.0.tar.gz
| Download URL | lettr-1.6.0.tar.gz |
|---|---|
| Size | 56.1 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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Transparency logRelease files / lettr-1.6.0-py3-none-any.whl
| Download URL | lettr-1.6.0-py3-none-any.whl |
|---|---|
| Size | 38.9 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
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