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import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
data = pd.DataFrame({
"a":[1, 2, 3, 12, 132, 432, 432, 646, 63, 234, 154],
"b":[1, 21, 23, 122, 232, 42, 423, 546, 163, 234, 254],
"c":[12, 32, 3, 12, 154, 432, 6, 34, 44, 23, 21],
})
plt.bar(data["a"].mean(), height=1)
plt.bar(data["b"].std(), height=1)