Catching AttributeError when repr(fifo) that hasn't had fifo.write(fr…

…ame) called yet

av/audio/fifo.pyx

@@ -9,14 +9,21 @@ cdef class AudioFifo:
     """A simple audio sample FIFO (First In First Out) buffer."""
 
     def __repr__(self):
-        return '<av.%s %s samples of %dhz %s %s at 0x%x>' % (
-            self.__class__.__name__,
-            self.samples,
-            self.sample_rate,
-            self.layout,
-            self.format,
-            id(self),
-        )
+        try:
+            result = '<av.%s %s samples of %dhz %s %s at 0x%x>' % (
+                self.__class__.__name__,
+                self.samples,
+                self.sample_rate,
+                self.layout,
+                self.format,
+                id(self),
+            )
+        except AttributeError:
+            result = '<av.%s uninitialized, use fifo.write(frame), at 0x%x>' % (
+                self.__class__.__name__,
+                id(self),
+            )
+        return result
 
     def __dealloc__(self):
         if self.ptr: