Ruff check

fin_defs/__init__.py

@@ -1,3 +1,8 @@
+"""# Finance Definitions.
+
+Python library defining base types for financial processing.
+"""
+
 import abc
 import dataclasses
 import datetime
@@ -95,11 +100,11 @@ class CryptoCurrency(Currency):
     coingecko_id: str | None
 
     def __post_init__(self):
-        '''TODO
+        """TODO
         if not re.match(RE_CRYPTO_TICKER_FORMAT, self.ccxt_symbol):
             msg = f'ccxt_symbol was not in correct format: {self.ccxt_symbol}'
             raise ValueError(msg)
-        '''
+        """
 
     def __str__(self):
         return self.ccxt_symbol
@@ -284,7 +289,6 @@ EXCHANGES = [
     StockExchange(name='Johannesburg Stock Exchange', mic='XJSE'),
     StockExchange(name='Tehran Stock Exchange', mic='XTEH'),
     StockExchange(name='Over The Counter (Unlisted)', mic='OTC'),  # TODO: Unofficial
-
     StockExchange(name='NYSE Arca', mic='ARCX'),
     StockExchange(name='BATS Global Markets', mic='BATS'),
     StockExchange(name='NYSE American', mic='XASE'),