code: def machine_usage(self, hall_no):
          
  
          try:
              num = int(hall_no)
          except ValueError:
              raise ValueError("Room Number must be integer")
          r = requests.get(USAGE_BASE_URL + str(num), timeout=60)
          parsed = BeautifulSoup(r.text, 'html5lib')
          usage_table = parsed.find_all('table', width='504px')[0]
          rows = usage_table.find_all('tr')
          usages = {}
          for i, row in enumerate(rows):
              day = []
              hours = row.find_all('td')
              for hour in hours:
                  day.append(self.busy_dict[str(hour['class'][0])])
              usages[self.days[i]] = day
          return usages
docs: Returns the average usage of laundry machines every hour
          for a given hall.
  
          The usages are returned in a dictionary, with the key being
          the day of the week, and the value being an array listing the usages
          per hour.
  
          :param hall_no:
               integer corresponding to the id number for the hall. Thus number
               is returned as part of the all_status call.
  
          >>> english_house = l.machine_usage(2)