Add stringfy for utility to implement __str__ depends on py version

gviewer/util.py

@@ -1,3 +1,5 @@
+import sys
+
 try:
     import pygments
 except:  # pragma: no cover
@@ -24,3 +26,11 @@ def _join(markup_list, join_tag):
             combined_list.append("")
         markup_list = markup_list[index + 1:]
     return combined_list
+
+
+def stringfy(unicode_str):  # pragma: no cover
+    """Use to support py27 py35 __str__"""
+    if sys.version_info >= (3,):
+        return unicode_str
+    else:
+        return unicode_str.encode("utf8")

gviewer/view/element.py

@@ -1,9 +1,9 @@
-import sys
 import urwid
 from urwid.util import decompose_tagmarkup
 
-from gviewer.basic_widget import BasicWidget, SearchableText
 from gviewer.action import Actions
+from gviewer.basic_widget import BasicWidget, SearchableText
+from gviewer.util import stringfy
 
 
 class Base(object):  # pragma: no cover
@@ -15,10 +15,7 @@ def __unicode__(self):
         raise NotImplementedError
 
     def __str__(self):
-        if sys.version_info >= (3,):
-            return self.__unicode__()
-        else:
-            return self.__unicode__().encode("utf8")
+        return stringfy(self.__unicode__())
 
     def __bytes__(self):
         return self.__unicode__().encode("utf8")
@@ -95,10 +92,7 @@ def __unicode__(self):
         return text
 
     def __str__(self):
-        if sys.version_info >= (3,):
-            return self.__unicode__()
-        else:
-            return self.__unicode__().encode("utf8")
+        return stringfy(self.__unicode__())
 
     def __bytes__(self):
         return self.__unicode__().encode("utf8")