ENH: Add tab completion for node and interface inputs properties

nipype/interfaces/base/specs.py

@@ -234,7 +234,6 @@ def get_hashval(self, hash_method=None):
             The md5 hash value of the traited spec
 
         """
-
         list_withhash = []
         list_nofilename = []
         for name, val in sorted(self.trait_get().items()):
@@ -309,6 +308,10 @@ def _get_sorteddict(self,
                     out = objekt
         return out
 
+    @property
+    def __all__(self):
+        return self.copyable_trait_names()
+
 
 class TraitedSpec(BaseTraitedSpec):
     """ Create a subclass with strict traits.

nipype/interfaces/base/tests/test_specs.py

@@ -11,6 +11,10 @@
 from ....utils.filemanip import split_filename
 from ... import base as nib
 from ...base import traits, Undefined
+from ....interfaces import fsl
+from ...utility.wrappers import Function
+from ....pipeline import Node
+
 
 standard_library.install_aliases()
 
@@ -47,6 +51,20 @@ class spec(nib.TraitedSpec):
     assert infields.__repr__() == '\nfoo = 1\ngoo = 0.0\n'
 
 
+def test_TraitedSpec_tab_completion():
+    bet_nd = Node(fsl.BET(), name = 'bet')
+    bet_interface = fsl.BET()
+    bet_inputs = bet_nd.inputs.class_editable_traits()
+    bet_outputs = bet_nd.outputs.class_editable_traits() 
+
+    # Check __all__ for bet node and interface inputs
+    assert set(bet_nd.inputs.__all__) == set(bet_inputs)
+    assert set(bet_interface.inputs.__all__) == set(bet_inputs)
+
+    # Check __all__ for bet node outputs
+    assert set(bet_nd.outputs.__all__) == set(bet_outputs)
+
+
 @pytest.mark.skip
 def test_TraitedSpec_dynamic():
     from pickle import dumps, loads
@@ -63,6 +81,36 @@ def test_TraitedSpec_dynamic():
         assign_a_again
 
 
+def test_DynamicTraitedSpec_tab_completion():
+    def extract_func(list_out):
+        return list_out[0]
+
+    # Define interface
+    func_interface = Function(input_names=["list_out"],
+                             output_names=["out_file","another_file"],
+                             function=extract_func)
+    # Define node
+    list_extract = Node(Function(
+        input_names=["list_out"],output_names=["out_file"],
+        function=extract_func), name="list_extract")
+
+    # Check __all__ for interface inputs
+    expected_input = sorted(list_extract.inputs.editable_traits())
+    assert(sorted(func_interface.inputs.__all__) == expected_input)
+
+    # Check __all__ for node inputs
+    assert(sorted(list_extract.inputs.__all__) == expected_input)
+
+    # Check __all__ for node outputs
+    expected_output = sorted(list_extract.outputs.editable_traits())
+    assert(sorted(list_extract.outputs.__all__) == expected_output)
+
+    # Add trait and retest
+    list_extract._interface._output_names.append('added_out_trait')
+    expected_output = sorted(['added_out_trait',*expected_output])
+    assert(sorted(list_extract.outputs.__all__) == expected_output)
+
+
 def test_TraitedSpec_logic():
     class spec3(nib.TraitedSpec):
         _xor_inputs = ('foo', 'bar')