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Який результат отримаємо ? left = pd.DataFrame({'key': ['A', 'A'],   'lva...

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Який результат отримаємо?

left = pd.DataFrame({'key': ['A', 'A'],  'lval': [1, 2]})

right = pd.DataFrame({'key': ['A', 'A'],  'rval': [4, 5]})

pd.merge(left, right, on='key')

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