Nanotable Demo

from nanotable import Table, UniqueIndex, SortedMultiIndex
from datetime import datetime
from dataclasses import dataclass
from typing import Any, Protocol


@dataclass  # Doesn't have to be a dataclass. Any objects and mappings are supported
class Contact:
    name: str
    phone: str
    date_added: datetime


# Completely optional, but results in full IDE support
class Indexes(Protocol):
    name: UniqueIndex[Contact, str]
    phone: UniqueIndex[Contact, str]
    date_added: SortedMultiIndex[Contact, datetime]


table = Table[Contact, Indexes, UniqueIndex[Contact, str]](of_objects=True).primary_index_on("name")\
    .index_on("phone", kind=UniqueIndex, required=False)\
    .index_on("date_added", kind=SortedMultiIndex, required=True)

table.add(Contact("John Doe", "0123456789", datetime.now()))
table.add(Contact("John Smith", "9876543210", datetime.now()))

table.at["John Doe"]
table.by.name["John Doe"]

# Range queries on sorted indexes
table.by.date_added[datetime(2026, 6, 4):datetime.now()]

guy = table.by.phone["9876543210"]
with table.rekey(guy):
    guy.name += " (owes me money!)"
    # Indexes are automatically updated