fix: assert print_statement test

Author: mgxd

nipype/utils/tests/test_functions.py

@@ -26,12 +26,16 @@ def test_func_py2():
     def is_string():
         return isinstance('string', str)
 
-    def print_statement():
-        # test python 2 compatibility
+def print_statement():
+    # test python 2 compatibility
+    try:
         exec('print ""')
+        return True
+    except SyntaxError:
+        return False
 
     wrapped_func = create_function_from_source(getsource(is_string))
     assert is_string() == wrapped_func()
 
     wrapped_func2 = create_function_from_source(getsource(print_statement))
-    wrapped_func2()
+    assert wrapped_func2()