Data Legion Python SDK

The official Python client for the Data Legion API.

Installation

pip install datalegion

Quick Start

from datalegion import DataLegion

client = DataLegion(api_key="legion_...")

Or set the DATALEGION_API_KEY environment variable and omit the api_key argument:

client = DataLegion()

Person Enrichment

Look up a person by email, phone, social URL, name, or other identifiers. Returns a PersonResponse with full type hints and dot access.

person = client.person.enrich(email="john@example.com")
print(person.full_name)
print(person.job_title)
print(person.company_name)

# Multiple results
results = client.person.enrich(
    email="john@example.com",
    multiple_results=True,
    limit=5,
)
for match in results.matches:
    print(match.person.full_name, match.match_metadata.match_confidence)

# Enrich by name + company
person = client.person.enrich(
    first_name="John",
    last_name="Doe",
    company="Google",
)

# Enrich by LinkedIn URL
person = client.person.enrich(social_url="https://linkedin.com/in/johndoe")

Person Search

Search for people using SQL queries.

results = client.person.search(
    query="SELECT * FROM people WHERE company_name ILIKE '%google%' AND city = 'San Francisco'",
    limit=10,
)
for match in results.matches:
    print(match.person.full_name)

Person Discover

Search for people using natural language.

results = client.person.discover(
    query="engineers in San Francisco who worked at Google",
    limit=10,
)
for match in results.matches:
    print(match.person.full_name)

Company Enrichment

Look up a company by domain, name, LinkedIn ID, or ticker symbol. Returns a CompanyResponse with dot access.

# By domain
company = client.company.enrich(domain="google.com")
print(company.name.cleaned)
print(company.industry)
print(company.legion_employee_count)

# By name
company = client.company.enrich(name="Google")

# Multiple results
results = client.company.enrich(name="Apple", multiple_results=True, limit=3)
for match in results.matches:
    print(match.company.name.cleaned)

Company Search

Search for companies using SQL queries.

results = client.company.search(
    query="SELECT * FROM companies WHERE industry = 'software development'",
    limit=10,
)
for match in results.matches:
    print(match.company.name.cleaned)

Company Discover

Search for companies using natural language.

results = client.company.discover(
    query="AI companies with more than 100 employees",
    limit=10,
)
for match in results.matches:
    print(match.company.name.cleaned)

Utilities

Clean & Normalize Fields

cleaned = client.utility.clean(
    fields={
        "email": "John.Doe+tag@gmail.com",
        "phone": "(555) 123-4567",
        "domain": "https://www.Google.com/about",
    }
)
for field, result in cleaned.results.items():
    print(f"{field}: {result.original} -> {result.cleaned}")

Hash Email

hashed = client.utility.hash_email(email="john@example.com")
print(hashed.hashes["sha256"])
print(hashed.hashes["md5"])

Validate Data

validated = client.utility.validate(
    email="john@example.com",
    phone="+15551234567",
    first_name="John",
)
print(validated.valid)
for error in validated.errors:
    print(f"{error.field}: {error.error}")

Report a Data Issue

Report an inaccuracy in a person or company record against its legion_id. Free; see the docs for the issue_type/issue_level rules.

report = client.utility.report_person(
    legion_id="abc123",
    issue_type="incorrect",
    issue_level="field",
    field="job_title",
    observed_value="CEO",
    correct_value="CTO",
)
print(report.report_id, report.status)

Company records use client.utility.report_company() with the same parameters.

Health Check

health = client.health()
print(health.status)

Async Usage

import asyncio
from datalegion import AsyncDataLegion

async def main():
    client = AsyncDataLegion(api_key="legion_...")

    person = await client.person.enrich(email="john@example.com")
    print(person.full_name)

    company = await client.company.enrich(domain="google.com")
    print(company.name.cleaned)

    await client.close()

asyncio.run(main())

Or use as a context manager:

async with AsyncDataLegion(api_key="legion_...") as client:
    person = await client.person.enrich(email="john@example.com")

Response Types

All responses are Pydantic models with full type hints and autocomplete support. Import them directly:

from datalegion import PersonResponse, CompanyResponse, PersonMatchesResponse

Response Headers

After each request, these attributes are updated on the client:

person = client.person.enrich(email="john@example.com")
print(client.request_id)             # unique request ID
print(client.credits_used)           # credits consumed
print(client.credits_remaining)      # credits remaining
print(client.contract_id)            # contract ID
print(client.rate_limit_limit)       # requests quota in current window
print(client.rate_limit_remaining)   # remaining requests in current window
print(client.rate_limit_reset)       # unix timestamp when window resets
print(client.rate_limit_policy)      # rate limit policy (e.g. "100/min")
print(client.retry_after)            # seconds to wait (on 429 responses)
print(client.generated_query)        # SQL from discover endpoints
print(client.correlation_id)         # echoed Correlation-ID
print(client.total_count_status)     # search/discover: "exact" | "estimate" | "page"

On search/discover, total_count_status tells you how the response total was derived: exact (true count), estimate (the query planner's row estimate — returned on broad queries where an exact count is too expensive, so treat it as a magnitude), or page (count unavailable; total is just the returned page size).

Error Handling

from datalegion import (
    DataLegion,
    AuthenticationError,
    InsufficientCreditsError,
    RateLimitError,
    ValidationError,
    APIError,
)

client = DataLegion(api_key="legion_...")

try:
    person = client.person.enrich(email="john@example.com")
except AuthenticationError as e:
    print(f"Invalid API key: {e.message}")
except InsufficientCreditsError as e:
    print(f"Out of credits: {e.message}")
except RateLimitError as e:
    print(f"Rate limited: {e.message}")
except ValidationError as e:
    print(f"Invalid request: {e.message}, details: {e.details}")
except APIError as e:
    print(f"Server error ({e.status_code}): {e.message}")

All exceptions inherit from DataLegionError and include these attributes:

• message - Human-readable error message
• status_code - HTTP status code
• error - Error type/code from the API
• details - Additional error details (if any)

Configuration

Documentation

For full API documentation, visit https://www.datalegion.ai/docs.