python3 -c 'import numpy as np; print(np.mean([1,2,3,4]))'
Compute a mean with NumPy
NumPy is Python's numeric array library, imported here as np. np.mean() averages the list [1,2,3,4] to 2.5 in one call. NumPy functions also operate on arrays and DataFrames with the same syntax. This is the minimal NumPy check that the library is installed and working.
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