More cleanup.

5 files changed, 30 insertions, 15 deletions

diff --git a/type/centcount.py b/type/centcount.py
index 2cb99e0..4529695 100644
--- a/type/centcount.py
+++ b/type/centcount.py
@@ -1,7 +1,10 @@
 #!/usr/bin/env python3
 
+"""An amount of money (USD) represented as an integral count of
+cents."""
+
 import re
-from typing import Optional, Tuple, TypeVar
+from typing import Optional, Tuple
 
 import math_utils
 
@@ -36,9 +39,9 @@ class CentCount(object):
         a = round(a, 2)
         s = f'{a:,.2f}'
         if self.currency is not None:
-            return '%s %s' % (s, self.currency)
+            return f'{s} {self.currency}'
         else:
-            return '$%s' % s
+            return f'${s}'
 
     def __pos__(self):
         return CentCount(centcount=self.centcount, currency=self.currency)
@@ -181,8 +184,8 @@ class CentCount(object):
     def __ge__(self, other):
         return self > other or self == other
 
-    def __hash__(self):
-        return self.__repr__
+    def __hash__(self) -> int:
+        return hash(self.__repr__)
 
     CENTCOUNT_RE = re.compile(r"^([+|-]?)(\d+)(\.\d+)$")
     CURRENCY_RE = re.compile(r"^[A-Z][A-Z][A-Z]$")
diff --git a/type/locations.py b/type/locations.py
index 24ab063..718a5f1 100644
--- a/type/locations.py
+++ b/type/locations.py
@@ -1,10 +1,14 @@
 #!/usr/bin/env python3
 
+"""An enum to represent locations."""
+
 import enum
 
 
 @enum.unique
-class Location(enum.Enum):
+class Location(enum.IntEnum):
+    """An enum to represent locations."""
+
     UNKNOWN = 0
     HOUSE = 1
     CABIN = 2
diff --git a/type/money.py b/type/money.py
index 39557aa..b84652b 100644
--- a/type/money.py
+++ b/type/money.py
@@ -1,8 +1,10 @@
 #!/usr/bin/env python3
 
+"""A class to represent money.  See also centcount.py"""
+
 import re
 from decimal import Decimal
-from typing import Optional, Tuple, TypeVar
+from typing import Optional, Tuple
 
 import math_utils
 
@@ -39,9 +41,9 @@ class Money(object):
         a = round(a, 2)
         s = f'{a:,.2f}'
         if self.currency is not None:
-            return '%s %s' % (s, self.currency)
+            return f'{s} {self.currency}'
         else:
-            return '$%s' % s
+            return f'${s}'
 
     def __pos__(self):
         return Money(amount=self.amount, currency=self.currency)
@@ -178,8 +180,8 @@ class Money(object):
     def __ge__(self, other):
         return self > other or self == other
 
-    def __hash__(self):
-        return self.__repr__
+    def __hash__(self) -> int:
+        return hash(self.__repr__)
 
     AMOUNT_RE = re.compile(r"^([+|-]?)(\d+)(\.\d+)$")
     CURRENCY_RE = re.compile(r"^[A-Z][A-Z][A-Z]$")
diff --git a/type/people.py b/type/people.py
index 1230db2..3a6f743 100644
--- a/type/people.py
+++ b/type/people.py
@@ -1,9 +1,13 @@
 #!/usr/bin/env python3
 
+"""An enum to represent people."""
+
 import enum
 
 
-class Person(enum.Enum):
+class Person(enum.IntEnum):
+    """An enum to represent people."""
+
     UNKNOWN = 0
     SCOTT = 1
     LYNN = 2
diff --git a/type/rate.py b/type/rate.py
index 64a4726..c365848 100644
--- a/type/rate.py
+++ b/type/rate.py
@@ -1,9 +1,13 @@
 #!/usr/bin/env python3
 
+"""A class to represent a rate of change."""
+
 from typing import Optional
 
 
 class Rate(object):
+    """A class to represent a rate of change."""
+
     def __init__(
         self,
         multiplier: Optional[float] = None,
@@ -28,9 +32,7 @@ class Rate(object):
             self.multiplier = 1.0 + percent_change / 100
             count += 1
         if count != 1:
-            raise Exception(
-                'Exactly one of percentage, percent_change or multiplier is required.'
-            )
+            raise Exception('Exactly one of percentage, percent_change or multiplier is required.')
 
     def apply_to(self, other):
         return self.__mul__(other)