PY0101EN-4.4_notebook_quizz_pandas.ipynb

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    "<center>\n",
    "    <img src=\"https://s3-api.us-geo.objectstorage.softlayer.net/cf-courses-data/CognitiveClass/Logos/organization_logo/organization_logo.png\" width=\"300\" alt=\"cognitiveclass.ai logo\"  />\n",
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   "source": [
    "<h3> Get to Know a Pandas Array </h3>\n"
   ]
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   "source": [
    "You will use the dataframe <code>df</code> for the following:\n"
   ]
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   "source": [
    "import pandas as pd\n",
    "\n",
    "df=pd.DataFrame({'a':[1,2,1],'b':[1,1,1]})"
   ]
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   "source": [
    "1) find the unique values in column <code> 'a' </code>:\n"
   ]
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([1, 2])"
      ]
     },
     "execution_count": 5,
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    "df['a'].unique()"
   ]
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   "source": [
    "2) return a dataframe with only the rows where column <code> a </code> is less than two \n"
   ]
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   "execution_count": 9,
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   "outputs": [
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       "   a  b\n",
       "0  1  1\n",
       "2  1  1"
      ]
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   "source": [
    "df[df['a']<2]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<hr>\n",
    "\n",
    "<h3 align=\"center\"> © IBM Corporation 2020. All rights reserved. <h3/>\n"
   ]
  }
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