diavgeia

A consolidated Python client for the Greek Δι@ύγεια (Diavgeia) OpenData API — the transparency programme where every administrative act of the Greek public sector is published with a unique ΑΔΑ (Αριθμός Διαδικτυακής Ανάρτησης).

One connection object covers the whole API: search, decisions, documents, the org chart, reference dictionaries, and the publishing endpoints.

pip install diavgeia

from diavgeia import Diavgeia, Q

with Diavgeia() as dv:
    d = dv.decisions.get("ΡΒΠΕ7ΛΞ-Ν1Ζ")
    print(d.subject, d.issue_date, d.amount())

    contracts = Q.decision_type("Δ.1") & Q.subject("ΠΡΟΜΗΘΕΙΑ")
    for decision in dv.search.iter_advanced(contracts,
                                            from_issue_date="2024-01-01",
                                            to_issue_date="2024-12-31",
                                            max_results=100):
        print(decision.ada, decision.amount(), decision.subject)

All read endpoints are public — no credentials required.

Why this exists

The API has two behaviours that quietly corrupt naive harvesting, and both are handled for you.

The 180-day clamp. Ask for more than 180 days and the server does not complain — it rewrites the end of your range to from + 180 days and returns a subset. Measured against the live API for one municipality across 2023:

The page-size cap. size is capped at 500 anonymously, 1 000 authenticated; larger values are silently clamped. Pagination follows the size the server actually used, so a clamped request cannot make a harvest stop after one page.

What you get

• A real connection object — pooled session, Basic auth, retries with jittered backoff, a courtesy rate limiter, and a typed exception hierarchy.
• Complete endpoint coverage — every endpoint in the published documentation, including submit / publish / corrected copy / revocation.
• Typed models — frozen dataclasses, epoch-millis converted to timezone-aware Europe/Athens datetimes, the untouched payload always kept in .raw, and unknown fields never break parsing.
• A structural query builder — Q composes advanced-search expressions with & and |, parenthesising by precedence, so unbalanced brackets and quote-injection from Greek free text are impossible.
• Automatic window splitting and pagination — sweep any date range; memory stays flat.
• id → label resolution with an optionally disk-backed cache.
• Verified downloads — checks the SHA-1 Diavgeia publishes, and never leaves a partial file behind.
• Resumable bulk harvest to JSONL, plus CSV (Excel-safe UTF-8 BOM) and pandas export.
• Local payload validation against a decision type's extra-field schema, before you publish.
• Resumable cursors — hold a position in a sweep, encode it to an opaque token, pick it up in another process.
• A container protocol — dv.organizations["6067"], [0:10], len(), iteration, accent-folded find(), and IPython tab-completion.
• Archive export — a folder tree of metadata, signed PDFs and attachments, in the layout you choose (by year, by body, by type, or your own), resumable.
• A CLI: diavgeia search, get, doc, harvest, orgs, types, dict.

Quick tour

from diavgeia import Diavgeia, Q

dv = Diavgeia(cache_dir="~/.cache/diavgeia")

# search
page = dv.search.simple(org="6067", from_issue_date="2024-01-01",
                        to_issue_date="2024-03-31", size=100)
page.total, page.info.query      # info.query is what the server ACTUALLY ran

# stream a multi-year range; windows and pages handled for you
for d in dv.search.iter(org="6067", from_issue_date="2020-01-01",
                        to_issue_date="2024-12-31"):
    ...

# one decision, its history, and its signed PDF
d = dv.decisions.get("ΡΒΠΕ7ΛΞ-Ν1Ζ")
dv.decisions.version_log(d.ada)
dv.decisions.download_document(d.ada, "out/", verify_checksum=True)

# org chart (accent- and case-insensitive name search)
dv.organizations.find("δημος γορτυνασ")
dv.organizations.units("6067")
dv.organizations.signers("6067")

# reference data
dv.types.details("Β.1.3").extra_fields
dv.dictionaries.get("FEKTYPES")

# collections behave like Python containers
len(dv.organizations); dv.organizations["6067"]; dv.organizations[0:5]

# cursors: hold a position and resume it later
cursor = dv.search.cursor(org="6067", from_issue_date="2020-01-01",
                          to_issue_date="2024-12-31")
token = cursor.to_token()
cursor = dv.search.resume(token)

# a full archive: metadata + PDFs + attachments, foldered how you like
dv.export_archive("archive/", org="6067", from_issue_date="2023-01-01",
                  to_issue_date="2024-12-31", layout="org/year", attachments=True)

# resolve ids to names, and export
dv.describe(d)
dv.export_csv(dv.search.all(org="6067", from_issue_date="2024-01-01",
                            to_issue_date="2024-06-30"), "acts.csv")

Command line

diavgeia get ΡΒΠΕ7ΛΞ-Ν1Ζ --labels
diavgeia search --org 6067 --from 2024-01-01 --to 2024-06-30 -n 20
diavgeia harvest acts.jsonl --from 2023-01-01 --to 2023-12-31 --org 6067
diavgeia orgs "δημος γορτυνασ"
diavgeia types Β.1.3

Publishing

Requires Basic Authentication as a user with publishing rights on the issuing body.

dv = Diavgeia(environment="test", username="10599_api", password="…")

dv.validate_metadata(metadata)                            # local schema check
dv.decisions.verify(metadata, document="decision.pdf")    # server dry-run
decision = dv.decisions.publish(metadata, document="decision.pdf")
print(decision.ada)

Also available: submit(), update_published(), corrected_copy() (ορθή επανάληψη) and request_revocation().

Requirements

Python 3.9+ and requests. pip install 'diavgeia[pandas]' adds DataFrame export.

Links

• Documentation and source: https://github.com/infimum/diavgeia-client
• Upstream API reference: https://diavgeia.gov.gr/api/help
• Official sample clients: https://github.com/diavgeia

MIT licensed. Not an official product of the Greek Ministry of Digital Governance.