tools: prepare tools/icu/icutrim.py for Python 3

PR-URL: #24888
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

Author: cclauss

tools/icu/icutrim.py

@@ -12,16 +12,25 @@
 # Use "-h" to get help options.
 
 from __future__ importprint_function
-importsys
-importshutil
-# for utf-8
-reload(sys)
-sys.setdefaultencoding("utf-8")
 
+importjson
 importoptparse
 importos
-importjson
 importre
+importshutil
+importsys
+
+try:
+# for utf-8 on Python 2
+reload(sys)
+sys.setdefaultencoding("utf-8")
+exceptNameError:
+pass# Python 3 already defaults to utf-8
+
+try:
+basestring# Python 2
+exceptNameError:
+basestring=str# Python 3
 
 endian=sys.byteorder
 
@@ -214,7 +223,7 @@ def queueForRemoval(tree):
 if(options.verbose>0):
 print("* %s: %d items"% (tree, len(mytree["locs"])))
 # do varible substitution for this tree here
-iftype(config["trees"][tree]) ==strortype(config["trees"][tree]) ==unicode:
+ifisinstance(config["trees"][tree], basestring):
 treeStr=config["trees"][tree]
 if(options.verbose>5):
 print(" Substituting $%s for tree %s"% (treeStr, tree))