# coding: utf-8
import io
import locale
import os

print 'Local pref: ', locale.getpreferredencoding()
print 'LANG env: ', os.environ['LANG']

tmpfile = 'ascii.tmp'
fh = io.open(tmpfile, 'wt', encoding='ascii')
fh.write(u'L'*44)
fh.close()
print io.open(tmpfile).read()

del os.environ['LANG']
print 'Local pref: ', locale.getpreferredencoding()
print 'LANG env has key: ', os.environ.has_key('LANG')
print locale.getpreferredencoding()

#This will raise exception
print io.open(tmpfile).read()