Problem 1

Import NumPy under the alias np.

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Problem 2

Import pandas under the alias pd.

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Problem 3

Using df1 and df2 as specified below, merge them using the key key. Specify how = inner as an argument.

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df1 = pd.DataFrame({'key': ['foo', 'bar', 'baz', 'foo'],
                    'value': [1, 2, 3, 5]})
df2 = pd.DataFrame({'key': ['foo', 'bar', 'baz', 'foo'],
                    'value': [5, 6, 7, 8]})
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#Solution goes here