py3: a few miscellaneous bytes/str fixes in sage.repl

src/sage/repl/display/jsmol_iframe.py

@@ -19,10 +19,11 @@
 discussion of loading JSMol.
 """
 
+import io
 import os
 import zipfile
-from six import StringIO
 
+from sage.cpython.string import bytes_to_str
 from sage.env import SAGE_LOCAL
 from sage.structure.sage_object import SageObject
 from sage.misc.cachefunc import cached_method
@@ -121,7 +122,7 @@ def __init__(self, jmol, path_to_jsmol=None, width='100%', height='100%'):
         if not isinstance(jmol, OutputSceneJmol):
             jmol = jmol._rich_repr_jmol()
         self._jmol = jmol
-        self._zip = zipfile.ZipFile(StringIO(self._jmol.scene_zip.get()))
+        self._zip = zipfile.ZipFile(io.BytesIO(self._jmol.scene_zip.get()))
         if path_to_jsmol is None:
             self._path = os.path.join('/', 'nbextensions', 'jsmol')
         else:
@@ -152,21 +153,20 @@ def script(self):
         script = []
         with self._zip.open('SCRIPT') as SCRIPT:
             for line in SCRIPT:
-                if line.startswith('pmesh'):
-                    command, obj, meshfile = line.split(' ', 3)
-                    assert command == 'pmesh'
-                    if meshfile not in ['dots\n', 'mesh\n']:
-                        assert meshfile.startswith('"') and meshfile.endswith('"\n')
+                if line.startswith(b'pmesh'):
+                    command, obj, meshfile = line.split(b' ', 3)
+                    assert command == b'pmesh'
+                    if meshfile not in [b'dots\n', b'mesh\n']:
+                        assert (meshfile.startswith(b'"') and
+                                meshfile.endswith(b'"\n'))
                         meshfile = meshfile[1:-2]    # strip quotes
                         script += [
-                            'pmesh {0} inline "'.format(obj),
-                            self._zip.open(meshfile).read(),
+                            'pmesh {0} inline "'.format(bytes_to_str(obj)),
+                            bytes_to_str(self._zip.open(meshfile).read()),
                             '"\n'
                         ]
-                    else:
-                        script += [line]
-                else:
-                    script += [line]
+                        continue
+                script += [bytes_to_str(line)]
         return ''.join(script)
 
     def js_script(self):

src/sage/repl/image.py

@@ -32,6 +32,7 @@
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
+import io
 
 import PIL.Image
 from sage.structure.sage_object import SageObject
@@ -293,11 +294,10 @@ def _rich_repr_(self, display_manager, **kwds):
             ('JPEG', types.OutputImageJpg),
             ('GIF',  types.OutputImageGif),
         )
-        from six import StringIO
         from sage.repl.rich_output.buffer import OutputBuffer
         for format, output_container in preferred:
             if output_container in display_manager.supported_output():
-                stream = StringIO()
+                stream = io.BytesIO()
                 try:
                     self.pil.save(stream, format=format)
                 except IOError: