Combine Datasets in Pandas.ipynb

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    "import pandas as pd\n",
    "\n",
    "adf = pd.DataFrame(data={'x1': ['A','B','C'], 'x2': [1, 2, 3]})"
   ]
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   "source": [
    "bdf = pd.DataFrame(data={'x1': ['A','B','D'], 'x3': ['T', 'F', 'T']})"
   ]
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