Add coercions
diff --git a/Demo/classes/Rat.py b/Demo/classes/Rat.py
index 0b2519d..0d3e515 100755
--- a/Demo/classes/Rat.py
+++ b/Demo/classes/Rat.py
@@ -52,12 +52,18 @@
raise TypeError, 'Rat.__coerce__: bad other arg'
def __add__(a, b):
+ if type(b) <> type(a):
+ a, b = a.__coerce__(b)
+ return a + b
return rat(a.num*b.den + b.num*a.den, a.den*b.den)
def __sub__(a, b):
return rat(a.num*b.den - b.num*a.den, a.den*b.den)
def __mul__(a, b):
+ if type(b) <> type(a):
+ a, b = a.__coerce__(b)
+ return a * b
return rat(a.num*b.num, a.den*b.den)
def __div__(a, b):
@@ -78,9 +84,13 @@
l.sort()
print l
print rat(0, 1)
- print rat(1, 0)
print a+1
print a+1L
print a+1.0
+ try:
+ print rat(1, 0)
+ raise SystemError, 'should have been ZeroDivisionError'
+ except ZeroDivisionError:
+ print 'OK'
-test()
+#test()