Add a way to print error messages to stderr.

3 files changed, 12 insertions, 4 deletions

diff --git a/example.py b/example.py
index ddb5500..909ce46 100644
--- a/example.py
+++ b/example.py
@@ -60,6 +60,8 @@ def main():
         if os.path.islink(pathname):
             ts['symlink'] = pathname
             ts.notify('Symlink! %s' % pathname)
+        elif 'error' in pathname:
+            ts.error('Error in pathname: %s' % pathname)
         ts['done'] += 1
 
     ts.finish()
diff --git a/ttystatus/messager.py b/ttystatus/messager.py
index 7237ea0..6085132 100644
--- a/ttystatus/messager.py
+++ b/ttystatus/messager.py
@@ -116,7 +116,7 @@ class Messager(object):
         '''Remove current message from terminal.'''
         self._overwrite('')
         
-    def notify(self, string):
+    def notify(self, string, f):
         '''Show a notification message string to the user.
         
         Notifications are meant for error messages and other things
@@ -133,8 +133,8 @@ class Messager(object):
             old = self._last_msg
             self.clear()
             try:
-                sys.stdout.write('%s\n' % string)
-                sys.stdout.flush()
+                f.write('%s\n' % string)
+                f.flush()
             except IOError: # pragma: no cover
                 # We ignore these. No point in crashing if terminal is bad.
                 pass
diff --git a/ttystatus/status.py b/ttystatus/status.py
index 63bf438..b5d743a 100644
--- a/ttystatus/status.py
+++ b/ttystatus/status.py
@@ -14,6 +14,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
+import sys
+
 import ttystatus
 
 
@@ -80,7 +82,11 @@ class TerminalStatus(object):
     
     def notify(self, msg):
         '''Show a message.'''
-        self._m.notify(msg)
+        self._m.notify(msg, sys.stdout)
+
+    def error(self, msg):
+        '''Write an error message.'''
+        self._m.notify(msg, sys.stderr)
     
     def finish(self):
         '''Finish status display.'''