Fix issue 576

2 files changed, 11 insertions, 0 deletions

diff --git a/isort/isort.py b/isort/isort.py
index 970117f1..7c915e97 100644
--- a/isort/isort.py
+++ b/isort/isort.py
@@ -400,6 +400,10 @@ class SortImports(object):
                     while from_imports and from_imports[0] in as_imports:
                         from_import = from_imports.pop(0)
                         from_comments = self.comments['straight'].get('{}.{}'.format(module, from_import))
+                        above_comments = self.comments['above']['from'].pop(module, None)
+                        if above_comments:
+                            section_output.extend(above_comments)
+                            
                         section_output.append(self._add_comments(from_comments,
                                                                  self._wrap(import_start + as_imports[from_import])))
 
diff --git a/test_isort.py b/test_isort.py
index 51b34357..bdd4453c 100644
--- a/test_isort.py
+++ b/test_isort.py
@@ -2708,3 +2708,10 @@ def test_safety_excludes(tmpdir, enabled):
     else:
         assert file_names == {'.tox/verysafe.py', 'lib/python3.7/importantsystemlibrary.py', 'victim.py'}
         assert not skipped
+
+
+def test_comments_not_removed_issue_576():
+    test_input = ('import distutils\n'
+                  '# this comment is important and should not be removed\n'
+                  'from sys import api_version as api_version\n')
+    assert SortImports(file_contents=test_input).output == test_input