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"""Asynchronous example: electricity prices via REST API."""
import asyncio
from datetime import UTC, date, datetime, timedelta
from energyzero import ( # pyright: ignore[reportMissingImports]
EnergyPrices,
EnergyZero,
EnergyZeroConnectionError,
EnergyZeroNoDataError,
Interval,
PriceType,
)
def _price_to_string(price: float | None) -> str:
if price is None:
return "Unknown"
return f"€{price:0.3f}"
async def _fetch_day(client: EnergyZero, target_date: date) -> EnergyPrices | None:
try:
return await client.get_electricity_prices(
start_date=target_date,
interval=Interval.QUARTER,
price_type=PriceType.ALL_IN,
)
except (EnergyZeroConnectionError, EnergyZeroNoDataError) as err:
print(f"No data available for {target_date.isoformat()}: {err}")
return None
def _print_summary(label: str, data: EnergyPrices) -> None:
print(f"--- {label} ---")
if len(data.prices) == 0:
print("No electricity data available")
return
min_price, max_price = data.extreme_prices
print(f"Average price: {_price_to_string(data.average_price)}")
print(f"Min price: {_price_to_string(min_price)}")
print(f"Max price: {_price_to_string(max_price)}")
print(f"Lowest time: {data.lowest_price_time_range}")
print(f"Highest time: {data.highest_price_time_range}")
current = data.current_price
if current is not None:
print(f"Current price: {_price_to_string(current)}")
print(f"Percent of max: {data.pct_of_max_price}%")
print(f"Blocks <= current price: {data.time_ranges_priced_equal_or_lower}")
print()
async def main() -> None:
"""Fetch 15-minute electricity prices for today and tomorrow via REST."""
async with EnergyZero() as client:
today = datetime.now(UTC).astimezone().date()
tomorrow = today + timedelta(days=1)
prices_today = await _fetch_day(client, today)
prices_tomorrow = await _fetch_day(client, tomorrow)
if prices_today:
_print_summary(f"ELECTRICITY {today.isoformat()} (REST)", prices_today)
if prices_tomorrow:
_print_summary(f"ELECTRICITY {tomorrow.isoformat()} (REST)", prices_tomorrow)
if __name__ == "__main__":
asyncio.run(main())
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