diff --git a/fin_defs/__init__.py b/fin_defs/__init__.py
index f31883c..bf2e80e 100644
--- a/fin_defs/__init__.py
+++ b/fin_defs/__init__.py
@@ -17,7 +17,6 @@ Defined hierarchy:
 """
 
 from ._version import __version__
-
 from .data import *
 
 __all__ = [
@@ -27,4 +26,3 @@ __all__ = [
     'StockExchange',
     '__version__',
 ]
-
diff --git a/fin_defs/data.py b/fin_defs/data.py
index ac77ce7..bf2be56 100644
--- a/fin_defs/data.py
+++ b/fin_defs/data.py
@@ -5,6 +5,7 @@ import re
 from collections.abc import Mapping
 from decimal import Decimal
 
+
 def parse_id_attr_key_value_pair(attr_datum: str) -> tuple[str, str | int] | None:
     attr_datum = attr_datum.strip()
     if attr_datum == '':
diff --git a/fin_defs/parse_price.py b/fin_defs/parse_price.py
index 509783e..c9dd2a0 100644
--- a/fin_defs/parse_price.py
+++ b/fin_defs/parse_price.py
@@ -2,7 +2,13 @@ import logging
 import re
 from decimal import Decimal
 
-from .data import DKK, USD, Asset, AssetAmount, FiatCurrency, CURRENCY_CODES, CURRENCY_SYMBOLS
+from .data import (
+    CURRENCY_CODES,
+    CURRENCY_SYMBOLS,
+    Asset,
+    AssetAmount,
+    FiatCurrency,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -29,33 +35,40 @@ RE_CURRENCY_SYMBOLS = (
     r'(?P<sym>[' + ''.join(re.escape(c) for c in CURRENCY_SYMBOLS.values()) + '])'
 )
 
-RE_SYM_AMOUNT_CODE = re.compile(RE_CURRENCY_SYMBOLS
-        + r'\s*'
-        + RE_PRODUCT_PRICE_AMOUNT
-        + r'(?:\s+'
-        + RE_CURRENCY_CODES
-        + r')?', flags=re.IGNORECASE)
+RE_SYM_AMOUNT_CODE = re.compile(
+    RE_CURRENCY_SYMBOLS
+    + r'\s*'
+    + RE_PRODUCT_PRICE_AMOUNT
+    + r'(?:\s+'
+    + RE_CURRENCY_CODES
+    + r')?',
+    flags=re.IGNORECASE,
+)
 
 RE_AMOUNT_SYM_CODE = re.compile(
-        RE_PRODUCT_PRICE_AMOUNT
-        + r'\s*'
-        + RE_CURRENCY_SYMBOLS
-        + r'(?:\s+'
-        + RE_CURRENCY_CODES
-        + ')?'
-        , flags=re.IGNORECASE)
+    RE_PRODUCT_PRICE_AMOUNT
+    + r'\s*'
+    + RE_CURRENCY_SYMBOLS
+    + r'(?:\s+'
+    + RE_CURRENCY_CODES
+    + ')?',
+    flags=re.IGNORECASE,
+)
 
 RE_AMOUNT_CODE = re.compile(
-        RE_PRODUCT_PRICE_AMOUNT + r'\s+' + RE_CURRENCY_CODES
-        , flags=re.IGNORECASE)
+    RE_PRODUCT_PRICE_AMOUNT + r'\s+' + RE_CURRENCY_CODES,
+    flags=re.IGNORECASE,
+)
 
 RE_KR_AMOUNT = re.compile(
-        r'kr\.?\s*(' + RE_PRODUCT_PRICE_AMOUNT + ')',
-        flags=re.IGNORECASE)
+    r'kr\.?\s*(' + RE_PRODUCT_PRICE_AMOUNT + ')',
+    flags=re.IGNORECASE,
+)
 
-RE_AMOUNT_KR= re.compile(
-        '(' + RE_PRODUCT_PRICE_AMOUNT + r')\s*kr\.?',
-        flags=re.IGNORECASE)
+RE_AMOUNT_KR = re.compile(
+    '(' + RE_PRODUCT_PRICE_AMOUNT + r')\s*kr\.?',
+    flags=re.IGNORECASE,
+)
 
 
 def parse_price(text: str, default_currency: Asset) -> AssetAmount | None:
@@ -84,6 +97,8 @@ def parse_price(text: str, default_currency: Asset) -> AssetAmount | None:
     else:
         return None
 
-    currency = CURRENCY_CODES[code.upper()] if code else FiatCurrency.from_currency_symbol(sym)
+    currency = (
+        CURRENCY_CODES[code.upper()] if code else FiatCurrency.from_currency_symbol(sym)
+    )
     assert currency is not None
     return AssetAmount(currency, parse_amount(amount_text))
diff --git a/setup.py b/setup.py
index 6338b36..4583e88 100644
--- a/setup.py
+++ b/setup.py
@@ -30,6 +30,7 @@ Defined hierarchy:
 PACKAGE_DESCRIPTION_SHORT = """
 Python library defining base types for financial processing.""".strip()
 
+
 def parse_version_file(text: str) -> str:
     match = re.match(r'^__version__\s*=\s*(["\'])([\d\.]+)\1$', text)
     if match is None:
@@ -37,6 +38,7 @@ def parse_version_file(text: str) -> str:
         raise Exception(msg)
     return match.group(2)
 
+
 with open(PACKAGE_NAME + '/_version.py') as f:
     version = parse_version_file(f.read())
 
diff --git a/test/test_parse_price.py b/test/test_parse_price.py
index fa39886..92ebfe9 100644
--- a/test/test_parse_price.py
+++ b/test/test_parse_price.py
@@ -1,11 +1,15 @@
-import pytest
 from decimal import Decimal
+
+import pytest
+
 from fin_defs import DKK, USD, AssetAmount, FiatCurrency
 from fin_defs.parse_price import parse_price
 
+
 def dkk(amount):
     return AssetAmount(DKK, Decimal(amount))
 
+
 PRICES_PARSABLE = [
     ('DKK100', dkk(100)),
     ('100;-', dkk(100)),
@@ -23,14 +27,16 @@ PRICES_PARSABLE = [
 ]
 
 PRICES_UNPARSABLE = [
-        '007',
+    '007',
 ]
 
+
 @pytest.mark.parametrize(('price_string', 'parsed_amount'), PRICES_PARSABLE)
 def test_parse_price(price_string: str, parsed_amount: AssetAmount):
     result = parse_price(price_string, FiatCurrency.JPY)
     assert result == parsed_amount
 
+
 @pytest.mark.parametrize('price_string', PRICES_UNPARSABLE)
 def test_parse_unparsable(price_string: str):
     assert parse_price(price_string, USD) is None
@@ -39,6 +45,7 @@ def test_parse_unparsable(price_string: str):
 def parse_asset_amount(text: str) -> AssetAmount:
     return parse_price(text, FiatCurrency.JPY)
 
+
 def test_parse_asset_amount_dkk():
     assert parse_asset_amount('1338 DKK').amount == 1338
     assert parse_asset_amount('1338,00 DKK').amount == 1338
@@ -54,10 +61,10 @@ def test_parse_asset_amount_dkk():
     assert parse_asset_amount('kr. 825.00').amount == 825
     assert parse_asset_amount('kr. 825.00').asset == DKK
 
+
 def test_parse_asset_amount_usd():
     assert parse_asset_amount('$99').amount == 99
     assert parse_asset_amount('$99').asset == USD
 
     assert parse_asset_amount('99$ USD').amount == 99
     assert parse_asset_amount('99$ USD').asset == USD
-