import itertools
import math

def action(command, text, **kwargs):
    return '<action=`{}`{}>{}</action>'.format(command,' '+(' '.join(['{}={}'.format(k, v) for k,v in kwargs.items()])) if len(kwargs) else '', text)

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 '/'