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Order Fulfillment Pipeline

$39

Order processing automation, shipping label generation, tracking notification system, and returns management workflow.

📁 20 files

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📁 File Structure 20 files

order-fulfillment-pipeline/ ├── LICENSE ├── README.md ├── configs/ │ └── fulfillment_config.yaml ├── data/ │ └── sample_orders.csv ├── free-sample.zip ├── guide/ │ ├── 01-overview.md │ ├── 02-order-processing-automation.md │ └── 03-shipping-and-tracking-integration.md ├── guides/ │ └── fulfillment_guide.md ├── index.html ├── scripts/ │ └── run_fulfillment.py ├── src/ │ ├── __init__.py │ ├── carriers.py │ ├── models.py │ ├── pipeline.py │ ├── returns.py │ ├── shipping.py │ ├── state_machine.py │ └── tracking.py └── tests/ └── test_fulfillment.py

📖 Documentation Preview README excerpt

Order Fulfillment Pipeline

End-to-end order fulfillment system with state machine-driven lifecycle management, multi-carrier shipping, shipment tracking, returns processing, and fulfillment analytics — all in pure Python.

What's Inside

Module	File	Description
Data Models	`src/models.py`	Order, LineItem, Shipment, Address, ReturnRequest, TrackingEvent
State Machine	`src/state_machine.py`	Order lifecycle with validated transitions and audit trail
Pipeline	`src/pipeline.py`	Main orchestrator: submit -> confirm -> pick -> pack -> ship
Shipping	`src/shipping.py`	Rate calculation, zone estimation, DIM weight, carrier comparison
Tracking	`src/tracking.py`	Event timeline, customer notifications, delivery performance
Returns	`src/returns.py`	Return lifecycle, eligibility checks, refund calculation, restocking fees
Carriers	`src/carriers.py`	Pluggable carrier adapter interface with mock implementations

Features

State machine-driven lifecycle — 13 order states with validated transitions, pre/post hooks, and full audit trail
Batch fulfillment — process multiple orders through picking, packing, and shipping in configurable batch sizes
Multi-carrier shipping — pluggable carrier adapters, rate comparison across carriers, zone-based pricing with DIM weight
Free shipping logic — configurable order threshold for automatic free shipping
Shipment tracking — event timeline management, customer-facing status messages, notification generation
Returns processing — eligibility checks, restocking fee calculation, disposition tracking (restock/refurbish/liquidate/dispose)
Configurable return policy — return window, fee waivers by reason, non-returnable tags, refund-without-return threshold
Delivery analytics — on-time rate, carrier performance comparison, return rate analysis
Pure Python — zero pip dependencies, Python 3.10+ stdlib only

Quick Start


cd order-fulfillment-pipeline/
python scripts/run_fulfillment.py
python -m pytest tests/test_fulfillment.py -v

Project Structure


order-fulfillment-pipeline/
├── src/
│   ├── __init__.py         # Package exports
│   ├── models.py           # Domain objects (Order, Shipment, Address, etc.)
│   ├── state_machine.py    # Order lifecycle state machine
│   ├── pipeline.py         # Fulfillment pipeline orchestrator
│   ├── shipping.py         # Shipping rate calculator
│   ├── tracking.py         # Shipment tracking and notifications
│   ├── returns.py          # Returns processing and refund calculation
│   └── carriers.py         # Carrier adapter interface and mocks
├── configs/
│   └── fulfillment_config.yaml  # All settings with comments
├── data/
│   └── sample_orders.csv   # 8 sample orders with 12 line items
├── scripts/
│   └── run_fulfillment.py  # Full demo script (6 demos)
├── tests/
│   └── test_fulfillment.py # 20+ unit tests across all modules
├── guides/
│   └── fulfillment_guide.md # Setup and usage documentation
├── LICENSE                 # MIT License

*... continues with setup instructions, usage examples, and more.*

📄 Code Sample .py preview

src/carriers.py """ Carrier Adapters — Order Fulfillment Pipeline ================================================ Pluggable carrier integration interface. Implement the CarrierAdapter abstract class to connect to your carrier's API for label generation, tracking updates, and rate queries. Includes built-in mock adapters for testing. In your environment, replace these with real API integrations (EasyPost, ShipStation, Shippo, or direct carrier APIs). """ from __future__ import annotations import abc import hashlib import logging from dataclasses import dataclass, field from datetime import datetime, timezone from typing import Any, Dict, List, Optional from src.models import Address, Shipment, TrackingEvent logger = logging.getLogger(__name__) # --------------------------------------------------------------------------- # Carrier adapter interface # --------------------------------------------------------------------------- class CarrierAdapter(abc.ABC): """Abstract interface for carrier integrations. Implement this for each carrier you want to support. The fulfillment pipeline calls these methods during order processing. """ @property @abc.abstractmethod def carrier_name(self) -> str: """Human-readable carrier name.""" ... @abc.abstractmethod def create_label( self, from_address: Address, to_address: Address, weight_oz: float, service: str, # ... 236 more lines ...

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