def showReaders():
readers = st.listReaders()
print 'All smart card readers : '
i = 0
print '%6s | %-s' % ('Index ','ReaderName')
print '-'*(len('Index | ')+len('ReaderName'))
while i < len(readers):
print '[%4d] | %-s' % (i, readers[i])
i += 1
print '-'*(len('Index | ')+len('ReaderName'))
return readers
