def input(st,default=None) :
if default is None :
default_str = ''
else :
default_str = ' [default: ' + default + ' ] '
out = None
while out is None :
out = raw_input(white(bold(st))+default_str+white(bold(':'))+' \n')
if len(out) == 0 :
out = default
return out
def wb(st) :
sys.stdout.write(white(bold(st)))