I've recently downloaded the .Net extensions for Python, and I've found some bugs regarding constructors and exceptions.

My test code is below, with two classes. The first takes a single integer argument, and generates a division by zero exception if this is zero. The second class will always generate an exception. Both constructors will write a line to stdout when run.

MyTest.cs: ---------------------------------------------------------------------- using System; using System.Collections; using System.Management;

namespace MyTest { public class Bad {

public Bad(int i) { Console.WriteLine("Test"); int i2 = 1; int i1 = i; i2 = i2 / i1; }

}

public class Bad2 {

public Bad2() { Console.WriteLine("Test"); int i2 = 1; int i1 = 0; i2 = i2 / i1; }

} } ---------------------------------------------------------------------- test.py: ---------------------------------------------------------------------- import CLR.MyTest import sys, traceback

try: print repr(CLR.MyTest.Bad(1)) except: print '-'*60 traceback.print_exc() print '-'*60

try: print repr(CLR.MyTest.Bad(0)) except: print '-'*60 traceback.print_exc() print '-'*60

try: print repr(CLR.MyTest.Bad2()) except: print '-'*60 traceback.print_exc() print '-'*60

try: print repr(CLR.MyTest.Bad2(1)) except: print '-'*60 traceback.print_exc() print '-'*60 ----------------------------------------------------------------------

Output from test.py: ---------------------------------------------------------------------- Test <CLR.MyTest.Bad object at 0x00B3F7B0> Test ------------------------------------------------------------ Traceback (most recent call last): File "test.py", line 12, in ? print repr(CLR.MyTest.Bad(0)) TypeError: no constructor matches given arguments ------------------------------------------------------------ Test Test ------------------------------------------------------------ Traceback (most recent call last): File "test.py", line 19, in ? print repr(CLR.MyTest.Bad2()) DivideByZeroException: Attempted to divide by zero. at MyTest.Bad2..ctor() ------------------------------------------------------------ Test ------------------------------------------------------------ Traceback (most recent call last): File "test.py", line 26, in ? print repr(CLR.MyTest.Bad2(1)) DivideByZeroException: Attempted to divide by zero. at MyTest.Bad2..ctor() ------------------------------------------------------------ ----------------------------------------------------------------------

The problems are as follows:

CLR.MyTest.Bad(0) -> Wrong traceback, wrong exception

CLR.MyTest.Bad2() -> Seems to call constructor twice (prints "Test" twice.)

CLR.MyTest.Bad2(1) -> Calls constructor instead of raising TypeError for bad number of arguments.