import itertools
import math
def create_bars(volume):
    num_bars=float(volume)/9000.0
    return ('/'*math.floor(num_bars))+partial_bar(num_bars-math.floor(num_bars))+(' '*(10-math.ceil(num_bars)))

def partial_bar(bar_size):
    if bar_size == 0.0:
        return ''
    elif bar_size < 0.3:
        return ' '
    elif bar_size < 0.6:
        return '.'
    elif bar_size < 0.9:
        return '-'
    return '/'

def action_bars(bars, control_pipe_name):
    return ''.join(['<action=`bash -c "echo ='+str(i+1)+' > '+control_pipe_name+'"`>'+c+'</action>' for i,c in zip(range(len(bars)), bars)])