<｜begin▁of▁sentence｜>### Instruction:
As a jewelry designer, you may often need to continuously modify and improve designs as new elements are introduced. Similar to this, let's consider a scenario where you are designing a necklace made up of a sequence of different sized gemstones (10mm, 20mm, 30mm, 40mm, 50mm). How can you continuously adjust the design and calculate the average size as new gemstones are added, for example, when a 60mm gemstone is introduced to the sequence?
### Response:
from RunningMean import RunningMean

# Initialize a RunningMean object
running_mean = RunningMean()

# Add multiple values to the RunningMean
data_values = [10, 20, 30, 40, 50]
running_mean.add_many(data_values)

# You can use the << operator as an alias to add_many
data_value = 60
running_mean << data_value

# Get the current mean
mean_value = running_mean.mean()
print('The running mean is:', mean_value)
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