fix: namesource behavior and test error

Author: satra

nipype/interfaces/base.py

@@ -1844,7 +1844,7 @@ def _filename_from_source(self, name, chain=None):
                 # special treatment for files
                 try:
                     _, base, source_ext = split_filename(source)
-                except AttributeError:
+                except (AttributeError, TypeError):
                     base = source
             else:
                 if name in chain:

nipype/interfaces/tests/test_base.py

@@ -209,7 +209,8 @@ class spec2(nib.CommandLineInputSpec):
                        position=2)
         doo = nib.File(exists=True, argstr="%s", position=1)
         goo = traits.Int(argstr="%d", position=4)
-        poo = nib.File(name_source=['goo'], hash_files=False, argstr="%s", position=3)
+        poo = nib.File(name_source=['goo'], hash_files=False, argstr="%s",
+                       position=3)
 
     class TestName(nib.CommandLine):
         _cmd = "mycommand"
@@ -218,6 +219,7 @@ class TestName(nib.CommandLine):
     testobj.inputs.doo = tmp_infile
     testobj.inputs.goo = 99
     assert '%s_generated' % nme in testobj.cmdline
+    assert '%d_generated' % testobj.inputs.goo in testobj.cmdline
     testobj.inputs.moo = "my_%s_template"
     assert 'my_%s_template' % nme in testobj.cmdline