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import asyncio
import decimal
import unittest
class DecimalContextTest(unittest.TestCase):
def test_asyncio_task_decimal_context(self):
async def fractions(t, precision, x, y):
with decimal.localcontext() as ctx:
ctx.prec = precision
a = decimal.Decimal(x) / decimal.Decimal(y)
await asyncio.sleep(t)
b = decimal.Decimal(x) / decimal.Decimal(y ** 2)
return a, b
async def main():
r1, r2 = await asyncio.gather(
fractions(0.1, 3, 1, 3), fractions(0.2, 6, 1, 3))
return r1, r2
r1, r2 = asyncio.run(main())
self.assertEqual(str(r1[0]), '0.333')
self.assertEqual(str(r1[1]), '0.111')
self.assertEqual(str(r2[0]), '0.333333')
self.assertEqual(str(r2[1]), '0.111111')
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