Use list[tuple[datetime, Decimal]] consistently

This type is useful for finance-py in general. It is often required to
handle money in datetime context. Using this type consistently makes the
code easier to read and maintain.

1 files changed, 2 insertions, 2 deletions

diff --git a/finance/flow.py b/finance/flow.py
index 4cf68db..c6b28c0 100644
--- a/finance/flow.py
+++ b/finance/flow.py
@@ -46,7 +46,7 @@ def monthly_candidates(start: datetime) -> Generator[datetime, None, None]:
 
 def simulate(
     start: datetime, end: datetime, flows: tuple[Flow, ...]
-) -> tuple[list[datetime], list[Decimal]]:
+) -> list[tuple[datetime, Decimal]]:
     dates: list[datetime] = []
     values: list[Decimal] = []
 
@@ -63,4 +63,4 @@ def simulate(
             value += flow.integrate(start, date)
         values.append(value)
 
-    return (dates, values)
+    return [(date, values[index]) for index, date in enumerate(dates)]