mirror of
https://github.com/bikini/patchwork
synced 2026-06-27 08:08:41 +00:00
ashton
85 lines
1.8 KiB
Python
85 lines
1.8 KiB
Python
from __future__ import annotations
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import asyncio
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from contextlib import contextmanager
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from dataclasses import dataclass
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@dataclass
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class Point:
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x: int
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y: int
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@contextmanager
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def tagged(name: str):
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yield f'<{name}>'
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def describe(value):
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match value:
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case Point(0, y):
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return f'y-axis:{y}'
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case Point(x=x, y=y) if x == y:
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return f'diagonal:{x}'
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case {'kind': 'pair', 'items': [first, *rest], **extra}:
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return f'pair:{first}:{len(rest)}:{sorted(extra)}'
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case ('wrap', inner as captured):
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return f'wrapped:{inner}:{captured}'
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case [head, *tail]:
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return f'list:{head}:{sum(tail)}'
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case _:
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return 'unknown'
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async def async_total(values):
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total = 0
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for value in values:
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await asyncio.sleep(0)
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total += value
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return total
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def make_counter(start=0):
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count = start
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def next_value(step=1):
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nonlocal count
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count += step
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return count
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return next_value
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class Box:
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def __init__(self, value):
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self.value = value
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@property
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def doubled(self):
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return self.value * 2
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def run() -> None:
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items = [
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Point(0, 7),
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Point(4, 4),
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{'kind': 'pair', 'items': [3, 5, 8], 'tag': 'fib'},
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('wrap', 'token'),
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[1, 2, 3, 4],
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object(),
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]
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print('descriptions:', [describe(item) for item in items])
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print('async:', asyncio.run(async_total([1, 2, 3, 4])))
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counter = make_counter(10)
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print('counter:', [counter(), counter(5), counter()])
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with tagged('ctx') as label:
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print('context:', label)
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print('box:', Box(9).doubled)
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print('bytes:', bytes([65, 66, 67]).decode())
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print('format:', f'{255:#06x}:{3.14159:.2f}')
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if __name__ == '__main__':
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run()
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