X-Git-Url: https://wannabe.guru.org/gitweb/?a=blobdiff_plain;f=type%2Fmoney.py;fp=type%2Fmoney.py;h=d7e6ffa2197c629949ecae30c855df5870cc3a3a;hb=6ba90a1f30f1c0cf4df12fcd0c62181f29bc3668;hp=290c2c86f91a7a6da652b21e670d2579c51ba6c0;hpb=31c81f6539969a5eba864d3305f9fb7bf716a367;p=python_utils.git

diff --git a/type/money.py b/type/money.py
index 290c2c8..d7e6ffa 100644
--- a/type/money.py
+++ b/type/money.py
@@ -1,26 +1,23 @@
 #!/usr/bin/env python3
 
-from decimal import Decimal
 import re
-from typing import Optional, TypeVar, Tuple
+from decimal import Decimal
+from typing import Optional, Tuple, TypeVar
 
 import math_utils
 
 
-T = TypeVar('T', bound='Money')
-
-
 class Money(object):
     """A class for representing monetary amounts potentially with
     different currencies.
     """
 
-    def __init__ (
-            self,
-            amount: Decimal = Decimal("0"),
-            currency: str = 'USD',
-            *,
-            strict_mode = False
+    def __init__(
+        self,
+        amount: Decimal = Decimal("0"),
+        currency: str = 'USD',
+        *,
+        strict_mode=False,
     ):
         self.strict_mode = strict_mode
         if isinstance(amount, str):
@@ -35,7 +32,7 @@ class Money(object):
         if not currency:
             self.currency: Optional[str] = None
         else:
-            self.currency: Optional[str] = currency
+            self.currency = currency
 
     def __repr__(self):
         a = float(self.amount)
@@ -55,10 +52,7 @@ class Money(object):
     def __add__(self, other):
         if isinstance(other, Money):
             if self.currency == other.currency:
-                return Money(
-                    amount = self.amount + other.amount,
-                    currency = self.currency
-                )
+                return Money(amount=self.amount + other.amount, currency=self.currency)
             else:
                 raise TypeError('Incompatible currencies in add expression')
         else:
@@ -66,17 +60,13 @@ class Money(object):
                 raise TypeError('In strict_mode only two moneys can be added')
             else:
                 return Money(
-                    amount = self.amount + Decimal(float(other)),
-                    currency = self.currency
+                    amount=self.amount + Decimal(float(other)), currency=self.currency
                 )
 
     def __sub__(self, other):
         if isinstance(other, Money):
             if self.currency == other.currency:
-                return Money(
-                    amount = self.amount - other.amount,
-                    currency = self.currency
-                )
+                return Money(amount=self.amount - other.amount, currency=self.currency)
             else:
                 raise TypeError('Incompatible currencies in add expression')
         else:
@@ -84,8 +74,7 @@ class Money(object):
                 raise TypeError('In strict_mode only two moneys can be added')
             else:
                 return Money(
-                    amount = self.amount - Decimal(float(other)),
-                    currency = self.currency
+                    amount=self.amount - Decimal(float(other)), currency=self.currency
                 )
 
     def __mul__(self, other):
@@ -93,8 +82,7 @@ class Money(object):
             raise TypeError('can not multiply monetary quantities')
         else:
             return Money(
-                amount = self.amount * Decimal(float(other)),
-                currency = self.currency
+                amount=self.amount * Decimal(float(other)), currency=self.currency
             )
 
     def __truediv__(self, other):
@@ -102,8 +90,7 @@ class Money(object):
             raise TypeError('can not divide monetary quantities')
         else:
             return Money(
-                amount = self.amount / Decimal(float(other)),
-                currency = self.currency
+                amount=self.amount / Decimal(float(other)), currency=self.currency
             )
 
     def __float__(self):
@@ -124,10 +111,7 @@ class Money(object):
     def __rsub__(self, other):
         if isinstance(other, Money):
             if self.currency == other.currency:
-                return Money(
-                    amount = other.amount - self.amount,
-                    currency = self.currency
-                )
+                return Money(amount=other.amount - self.amount, currency=self.currency)
             else:
                 raise TypeError('Incompatible currencies in sub expression')
         else:
@@ -135,8 +119,7 @@ class Money(object):
                 raise TypeError('In strict_mode only two moneys can be added')
             else:
                 return Money(
-                    amount = Decimal(float(other)) - self.amount,
-                    currency = self.currency
+                    amount=Decimal(float(other)) - self.amount, currency=self.currency
                 )
 
     __rmul__ = __mul__
@@ -148,10 +131,7 @@ class Money(object):
         if other is None:
             return False
         if isinstance(other, Money):
-            return (
-                self.amount == other.amount and
-                self.currency == other.currency
-            )
+            return self.amount == other.amount and self.currency == other.currency
         if self.strict_mode:
             raise TypeError("In strict mode only two Moneys can be compared")
         else:
@@ -196,8 +176,8 @@ class Money(object):
     def __hash__(self):
         return self.__repr__
 
-    AMOUNT_RE = re.compile("^([+|-]?)(\d+)(\.\d+)$")
-    CURRENCY_RE = re.compile("^[A-Z][A-Z][A-Z]$")
+    AMOUNT_RE = re.compile(r"^([+|-]?)(\d+)(\.\d+)$")
+    CURRENCY_RE = re.compile(r"^[A-Z][A-Z][A-Z]$")
 
     @classmethod
     def _parse(cls, s: str) -> Optional[Tuple[Decimal, str]]:
@@ -220,7 +200,7 @@ class Money(object):
         return None
 
     @classmethod
-    def parse(cls, s: str) -> T:
+    def parse(cls, s: str) -> 'Money':
         chunks = Money._parse(s)
         if chunks is not None:
             return Money(chunks[0], chunks[1])