Added TypedDict implementation for currencies.

piggybank/currencies.py

@@ -17,7 +17,7 @@ fields:
         divide this number by 100 to get a regular floating-point number.
 """
 
-from typing import Dict, List
+from typing import Dict, List, TypedDict
 
 __all__ = ["CURRENCIES", "DEFAULT_CURRENCY", "BaseCurrencyError",
            "CurrencyIsNotSupportedError", "CurrenciesCoinCountMismatchError",
@@ -53,7 +53,16 @@ class CurrenciesCoinCountMismatchError(BaseCurrencyError):
 
 DEFAULT_CURRENCY: str = "SRUB"
 
-CURRENCIES: Dict[Dict[str, str, int, List[str], List[int]]] = {
+
+class Currency(TypedDict):
+    name: str
+    description: str
+    count: int
+    names: List[str]
+    multipliers: List[int]
+
+
+CURRENCIES: Dict[str, Currency] = {
     "RUB": {
         "name": "Ruble",
         "description": "Russian Federation",