Fix for #875 Unicode Encoding Error

IPython/utils/path.py

@@ -106,7 +106,7 b' def get_py_filename(name, force_win32=None):'
     if os.path.isfile(name):
         return name
     else:
-        raise IOError,'File `%s` not found.' % name
+        raise IOError,'File `%r` not found.' % name
 
 
 def filefind(filename, path_dirs=None):

IPython/utils/tests/test_path.py

@@ -406,3 +406,10 b' def test_get_py_filename():'
             else:
                 nt.assert_raises(IOError, path.get_py_filename, '"foo with spaces.py"', force_win32=False)
                 nt.assert_raises(IOError, path.get_py_filename, "'foo with spaces.py'", force_win32=False)
+                
+def test_unicode_in_filename():
+    try:
+        # these calls should not throw unicode encode exceptions
+        path.get_py_filename(u'fooéè.py',  force_win32=False)
+    except IOError as ex:
+        str(ex)