bytes data

bt5/erp5_dms_conversion_catalog/SkinTemplateItem/portal_skins/erp5_dms_conversion_catalog/Base_isConvertible.py

 """
   Return true or false based on if document is convertible or not.
 """
-MARKER = (None, '',)
+MARKER = (None, b'',)
 portal = context.getPortalObject()
 
 portal_type = context.getPortalType()

bt5/erp5_multimedia/DocumentTemplateItem/portal_components/document.erp5.Sound.py

@@ -86,4 +86,4 @@ class Sound(File):
       RESPONSE.setHeader('Content-Range',
                          'bytes %s-%s/%s' % (start, end-1, total_length))
       RESPONSE.setStatus(206)
-    return str(data)
+    return bytes(data)
\ No newline at end of file

product/ERP5/bootstrap/erp5_core/MixinTemplateItem/portal_components/mixin.erp5.CachedConvertableMixin.py

@@ -228,7 +228,7 @@ class CachedConvertableMixin:
     if isinstance(data, OFSImage):
       data = data.data
     if isinstance(data, Pdata):
-      data = str(data)
+      data = bytes(data)
     return mime, data
 
   security.declareProtected(Permissions.AccessContentsInformation, 'getConversionSize')

product/PortalTransforms/transforms/png_to_text.py

@@ -39,7 +39,7 @@ class png_to_text(popentransform):
         else:
             popen = Popen([command, tmpname], env=environment, stdin=PIPE,
                                                                    stdout=PIPE)
-            out = popen.communicate(str(data))[0]
+            out = popen.communicate(bytes(data))[0]
 
         if not self.useStdin:
             # remove tmp file