X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fbindings%2Fpython%2Fbt2%2Fbt2%2Fstream.py;h=f1329623c2633c780c5bc06f2035c70ef6f6c0cf;hb=f5567ea88d172767b34373bc6e402da8bfd85ef8;hp=fe2af8621a0421487a47de84e5f19d1ebf8081d1;hpb=f0a42b33ac3951cd5cb2ee0f66ac04437a681621;p=babeltrace.git

diff --git a/src/bindings/python/bt2/bt2/stream.py b/src/bindings/python/bt2/bt2/stream.py
index fe2af862..f1329623 100644
--- a/src/bindings/python/bt2/bt2/stream.py
+++ b/src/bindings/python/bt2/bt2/stream.py
@@ -1,34 +1,21 @@
-# The MIT License (MIT)
+# SPDX-License-Identifier: MIT
 #
 # Copyright (c) 2016-2017 Philippe Proulx <pproulx@efficios.com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
 
 from bt2 import native_bt, utils
 from bt2 import object as bt2_object
 from bt2 import packet as bt2_packet
-from bt2 import trace as bt2_trace
 from bt2 import stream_class as bt2_stream_class
 from bt2 import value as bt2_value
 import bt2
 
 
+def _bt2_trace():
+    from bt2 import trace as bt2_trace
+
+    return bt2_trace
+
+
 class _StreamConst(bt2_object._SharedObject):
     _get_ref = staticmethod(native_bt.stream_get_ref)
     _put_ref = staticmethod(native_bt.stream_put_ref)
@@ -41,7 +28,7 @@ class _StreamConst(bt2_object._SharedObject):
     )
     _borrow_trace_ptr = staticmethod(native_bt.stream_borrow_trace_const)
     _stream_class_pycls = bt2_stream_class._StreamClassConst
-    _trace_pycls = bt2_trace._TraceConst
+    _trace_pycls = property(lambda _: _bt2_trace()._TraceConst)
 
     @property
     def cls(self):
@@ -79,18 +66,18 @@ class _Stream(_StreamConst):
     )
     _borrow_trace_ptr = staticmethod(native_bt.stream_borrow_trace)
     _stream_class_pycls = bt2_stream_class._StreamClass
-    _trace_pycls = bt2_trace._Trace
+    _trace_pycls = property(lambda _: _bt2_trace()._Trace)
 
     def create_packet(self):
         if not self.cls.supports_packets:
             raise ValueError(
-                'cannot create packet: stream class does not support packets'
+                "cannot create packet: stream class does not support packets"
             )
 
         packet_ptr = native_bt.packet_create(self._ptr)
 
         if packet_ptr is None:
-            raise bt2._MemoryError('cannot create packet object')
+            raise bt2._MemoryError("cannot create packet object")
 
         return bt2_packet._Packet._create_from_ptr(packet_ptr)