<｜begin▁of▁sentence｜>### Instruction:
Assume you have a list of numerical values and you are using the RunningMean class from the runningmean package to calculate the running mean. After adding several values to the running mean calculator, you decide to clear the running mean to start calculating a new set of values. Can you use the clear method of the RunningMean class to reset the running mean calculator, and confirm it has been reset by printing the running mean before and after the reset?
### Response:
from runningmean import RunningMean

# Initialize the running mean calculator
rm = RunningMean()

# Add some values
data = [8, 15, 22, 7]
for value in data:
    rm.add(value)

# Print the current running mean
print('Current running mean:', rm.mean())

# Reset the running mean calculator
erm.clear()

# Print the running mean after reset, should be 'None' because no values have been added
print('Running mean after reset:', rm.mean())
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