forcing everything python3, might end up with bugs

tsv/lib/tsvtail

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2015 Ville Rantanen
 #
@@ -17,13 +17,14 @@
 #
 
 '''simple tail for tsv/csv files.'''
+from __future__ import print_function
 
 __author__ = "Ville Rantanen <ville.q.rantanen@gmail.com>"
 
 __version__ = "0.1"
 
 import sys,os,argparse
-from argparse import ArgumentParser 
+from argparse import ArgumentParser
 
 def setup_options():
     ''' Create command line options '''
@@ -31,7 +32,7 @@ def setup_options():
 simple implementation of tail, keeping the header row
 
 '''
- 
+
     parser=ArgumentParser(description=usage,
                           formatter_class=argparse.RawDescriptionHelpFormatter,
                           epilog="\n".join(["Version: "+__version__,__author__]))
@@ -64,7 +65,7 @@ def tail(fileob,opts):
         tail_ordinary(fileob, opts.lines)
     else:
         tail_allbutfirst(fileob, -opts.lines)
-    
+
 def tail_allbutfirst(fileob, lines):
     for i,row in enumerate(fileob):
         if i<lines-1:
@@ -86,12 +87,13 @@ def main():
             tail(sys.stdin, opts)
         for fi in opts.file:
             tail(open(fi,'r'), opts)
-    except IOError as (n,e):
+    except IOError as xxx_todo_changeme:
+        (n,e) = xxx_todo_changeme.args
         if  n==32:
             pass
         else:
             import traceback
-            print traceback.format_exc()
+            print(traceback.format_exc())
     except KeyboardInterrupt:
         pass