guidelinely 1.0.4

Python client for the Guidelinely Environmental Guidelines API

Guidelinely Python Client

Python client library for the Guidelinely API - an environmental guideline calculation and search API.

Calculate context-dependent environmental guideline values for chemical parameters (Aluminum, Copper, Lead, etc.) in various media (water, soil, sediment) based on environmental conditions (pH, hardness, temperature, etc.).

This Python client mirrors the functionality of the R client.

Features

• ✅ Metadata Queries: List parameters, search, explore media types and sources
• ✅ Single Calculations: Calculate guidelines for individual parameters
• ✅ Batch Calculations: Efficiently calculate multiple parameters (up to 50)
• ✅ Context-Aware: Support for pH, hardness, temperature, and other environmental factors
• ✅ Unit Conversion: Optional target unit specification
• ✅ Type Safety: Full Pydantic model support for request/response validation
• ✅ Comprehensive Tests: Mock-based test suite with responses library

Installation

# Clone the repository
git clone https://github.com/mpdavison/envguidelines-py.git
cd envguidelines-py

# Install in development mode
pip install -e .

# Or install with dev dependencies
pip install -e ".[dev]"

Quick Start

from guidelinely import calculate_guidelines

# Calculate aluminum guidelines in surface water
result = calculate_guidelines(
    parameter="Aluminum",
    media="surface_water",
    context={
        "pH": "7.0 1",           # pH 7.0 (dimensionless)
        "hardness": "100 mg/L"   # Water hardness as CaCO3
    }
)

print(f"Found {result.total_count} guidelines")
for guideline in result.results:
    print(f"{guideline.parameter}: {guideline.value} ({guideline.source})")

API Key

Calculation endpoints optionally accept an API key. Set it as an environment variable:

export GUIDELINELY_API_KEY="your_api_key_here"

Metadata endpoints (list parameters, search, etc.) work without authentication.

Usage Examples

Basic Metadata Queries

from guidelinely import (
    health_check,
    list_parameters,
    search_parameters,
    list_media,
    list_sources,
    get_stats,
)

# Check API health
status = health_check()

# List all chemical parameters
params = list_parameters()
print(f"Available parameters: {len(params)}")

# Search for ammonia-related parameters
ammonia = search_parameters("ammon")
print(ammonia)  # ['Ammonia', 'Ammonium', ...]

# Get available media types
media = list_media()
# {'surface_water': 'Surface Water', 'soil': 'Soil', ...}

# View guideline sources
sources = list_sources()

# Database statistics
stats = get_stats()

Single Parameter Calculation

from guidelinely import calculate_guidelines
import os

os.environ["GUIDELINELY_API_KEY"] = "your_key"

result = calculate_guidelines(
    parameter="Copper",
    media="surface_water",
    context={
        "pH": "7.5 1",
        "hardness": "150 mg/L",
        "temperature": "15 °C",
        "chloride": "75 mg/L"
    },
    target_unit="μg/L"  # Optional unit conversion
)

# Filter results
chronic_aquatic = [
    g for g in result.results
    if g.receptor == "Aquatic Life" and g.exposure_duration == "chronic"
]

Batch Calculations

from guidelinely import calculate_batch

# Calculate multiple parameters at once (more efficient)
result = calculate_batch(
    parameters=["Aluminum", "Copper", "Lead", "Zinc", "Cadmium"],
    media="surface_water",
    context={
        "pH": "7.5 1",
        "hardness": "150 mg/L",
        "temperature": "15 °C"
    }
)

print(f"Total: {result.total_count} guidelines")

# With per-parameter unit conversion
result = calculate_batch(
    parameters=[
        "Aluminum",
        {"name": "Copper", "target_unit": "μg/L"},
        {"name": "Lead", "target_unit": "mg/L"}
    ],
    media="surface_water",
    context={"pH": "7.0 1", "hardness": "100 mg/L"}
)

Soil Calculations

result = calculate_guidelines(
    parameter="Lead",
    media="soil",
    context={
        "pH": "6.5 1",
        "organic_matter": "3.5 %",
        "cation_exchange_capacity": "15 meq/100g"
    }
)

Environmental Context Parameters

All context parameters must be strings with units (Pint format):

Water (surface_water, groundwater)

context = {
    "pH": "7.0 1",           # Dimensionless - use "1" as unit
    "hardness": "100 mg/L",  # mg/L as CaCO3
    "temperature": "20 °C",
    "chloride": "50 mg/L"
}

Soil

context = {
    "pH": "6.5 1",
    "organic_matter": "3.5 %",
    "cation_exchange_capacity": "15 meq/100g"
}

Sediment

context = {
    "pH": "7.0 1",
    "organic_matter": "2.5 %",
    "grain_size": "0.5 mm"
}

Data Models

The library uses Pydantic for type-safe data handling:

from guidelinely.models import GuidelineResponse, CalculationResponse

# All API responses are strongly typed
result: CalculationResponse = calculate_guidelines(...)

# Access typed fields
for guideline in result.results:
    guideline.parameter  # str
    guideline.value      # str (PostgreSQL unitrange format)
    guideline.lower      # Optional[float]
    guideline.upper      # Optional[float]
    guideline.unit       # str
    guideline.is_calculated  # bool

Guideline Value Format

Guidelines use PostgreSQL unitrange format:

• [10 μg/L,100 μg/L] - Range from 10 to 100 μg/L
• (,87.0 μg/L] - Upper limit only (≤87.0 μg/L)
• [5.0 mg/L,) - Lower limit only (≥5.0 mg/L)

Parsed into lower, upper, and unit fields.

Development

# Install development dependencies
pip install -e ".[dev]"

# Run tests
pytest

# Run tests with coverage
pytest --cov=guidelinely --cov-report=html

# Format code
black guidelinely/ tests/ examples/

# Type checking
mypy guidelinely/

# Linting
ruff check guidelinely/ tests/

API Reference

Client Functions

• health_check() - Service health check
• readiness_check() - Database readiness check
• list_parameters() - List all chemical parameters
• search_parameters(q, media) - Search parameters
• list_media() - List media types
• list_sources() - List guideline sources
• get_stats() - Database statistics
• calculate_guidelines(parameter, media, context, target_unit, api_key) - Calculate single parameter
• calculate_batch(parameters, media, context, api_key) - Batch calculate (max 50 parameters)

Models

• GuidelineResponse - Single guideline result
• CalculationResponse - Calculation endpoint response
• CalculateRequest - Single calculation request body
• BatchCalculateRequest - Batch calculation request body

Examples

See the examples/ directory for complete working examples:

1. 01_basic_metadata.py - Basic metadata queries
2. 02_calculate_single_parameter.py - Single parameter calculations
3. 03_batch_calculations.py - Batch calculations
4. 04_soil_calculations.py - Soil-specific calculations
5. 05_advanced_workflow.py - Advanced filtering and analysis

Resources

• API Documentation: https://guidelines.1681248.com/docs
• OpenAPI Spec: https://guidelines.1681248.com/openapi.json
• R Client: https://github.com/mpdavison/envguidelines
• Issue Tracker: https://github.com/mpdavison/envguidelines-py/issues

License

MIT License - see LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.