fhircraft 0.3.3

Fhircraft transforms FHIR (Fast Healthcare Interoperability Resources) specifications into type-safe Python models using Pydantic. Build healthcare applications with automatic validation, intelligent code completion, and seamless integration with Python's ecosystem.

Transform FHIR specifications into type-safe Python models with automatic validation, profile-friendly structures, and seamless integration. Build healthcare applications with confidence using Pydantic-powered FHIR resources, comprehensive FHIRPath querying, and declarative FHIR Mapping Language data transformation.

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[!WARNING]
This package is under active development. Major and/or breaking changes are to be expected in future updates.

✨ Why Choose Fhircraft?

Type Safety & Validation

Generate validated Pydantic models from core or profiled FHIR specifications. Catch data errors at development time with automatic constraint checking.

Pythonic FHIR Development

Work with FHIR resources using familiar Python and Pydantic patterns. No complex server infrastructure or XML parsing required - just clean, maintainable Python code.

Multi-Release Support

Seamlessly work with FHIR R4, R4B, and R5 specifications. Load implementation guides and custom profiles from the global FHIR package registry.

Integrated FHIRPath Engine

Query and manipulate FHIR data using the standard FHIRPath language with full Python integration. No external dependencies or separate query engines needed.

FHIR Mapping Language

Transform data between different structures using the official FHIR Mapping Language. Convert legacy systems and external data into validated FHIR resources.

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Quick Start

Prerequisites

• Python 3.10 or higher
• pip package manager

Installation

Install Fhircraft using pip:

pip install fhircraft

Or install the latest development version:

pip install git+https://github.com/luisfabib/fhircraft.git

Verify your installation:

from fhircraft.fhir.resources.datatypes import get_fhir_resource_type

# This should work without errors
Patient = get_fhir_resource_type("Patient")
print("✓ Fhircraft installed successfully!")

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Core Features

Built-in FHIR Resources

Access pre-built Pydantic models for all standard FHIR resources across multiple versions:

from fhircraft.fhir.resources.datatypes import get_fhir_resource_type

# Get built-in Patient model for FHIR R5
Patient = get_fhir_resource_type("Patient", "R5")

# Create and validate a patient
patient = Patient(
    name=[{"given": ["Alice"], "family": "Johnson"}],
    gender="female",
    birthDate="1985-03-15"
)

print(f"Created patient: {patient.name[0].given[0]} {patient.name[0].family}")

FHIR Package Integration

Load implementation guides and custom profiles from the FHIR package registry:

from fhircraft.fhir.resources.factory import factory

# Load US Core Implementation Guide
factory.load_package("hl7.fhir.us.core", "5.0.1")

# Create US Core Patient model with enhanced validation
USCorePatient = factory.construct_resource_model(
    canonical_url="http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient"
)

# Use with US Core constraints
patient = USCorePatient(
    identifier=[{"system": "http://example.org/mrn", "value": "12345"}],
    name=[{"family": "Doe", "given": ["John"]}],
    gender="male"
)

FHIRPath Querying

Query and manipulate FHIR resources using the standard FHIRPath language:

# Query patient data with FHIRPath
family_names = patient.fhirpath_values("Patient.name.family")
has_phone = patient.fhirpath_exists("Patient.telecom.where(system='phone')")

# Update data using FHIRPath expressions
patient.fhirpath_update_single("Patient.gender", "female")
patient.fhirpath_update("Patient.name.given", ["Jane", "Marie"])

print(f"Updated patient: {family_names[0]}, Phone: {has_phone}")

Data Transformation

Transform legacy data using the FHIR Mapping Language:

from fhircraft.fhir.mapper import FHIRMapper

# Legacy system data
legacy_patient = {
    "firstName": "Bob",
    "lastName": "Smith", 
    "dob": "1975-06-20",
    "sex": "M"
}

# FHIR Mapping script
mapping_script = """
map 'http://example.org/legacy-to-fhir' = 'LegacyPatient'

group main(source legacy, target patient: Patient) {
    legacy.firstName -> patient.name.given;
    legacy.lastName -> patient.name.family;
    legacy.dob -> patient.birthDate;
    legacy.sex where("$this = 'M'") -> patient.gender = 'male';
    legacy.sex where("$this = 'F'") -> patient.gender = 'female';
}
"""

# Execute transformation
mapper = FHIRMapper()
targets, metadata = mapper.execute_mapping(mapping_script, legacy_patient)
fhir_patient = targets[0]

print(f"Transformed: {fhir_patient.name[0].given[0]} {fhir_patient.name[0].family}")

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Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement".

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/amazing_feature)
3. Commit your Changes (git commit -m 'Add some amazing feature')
4. Push to the Branch (git push origin feature/amazing_feature)
5. Open a Pull Request (PR)

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License

Distributed under the MIT License. See LICENSE for more information.

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