4.2. Pandas indexing selection.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Библиотека Pandas"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Data Frame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "#создание DataFrame с помощью чтения данных из файла\n",
    "frame = pd.read_csv('data_sample_example.tsv', header=0, sep='\\t')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 71,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>1980-03-22</td>\n",
       "      <td>Москва</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "      <td>Волгоград</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>1980-02-13</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth       City      Position\n",
       "0      Иванов А.А. 1980-03-22     Москва  разнорабочий\n",
       "1     Сорокин И.В. 1965-07-08  Волгоград       инженер\n",
       "2       Белов М.М. 1980-02-13     Ростов      менеджер\n",
       "3  Мельникова Д.С. 1985-04-15     Ростов  разнорабочий\n",
       "4      Рыбина Е.П. 1985-11-19     Москва       инженер\n",
       "5     Костров С.О. 1985-05-31     Москва        стажер"
      ]
     },
     "execution_count": 71,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 85,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Name                object\n",
       "Birth       datetime64[ns]\n",
       "City                object\n",
       "Position            object\n",
       "dtype: object"
      ]
     },
     "execution_count": 85,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.dtypes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#изменение типа столбца с помощью функции apply\n",
    "frame.Birth = frame.Birth.apply(pd.to_datetime)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>1980-03-22</td>\n",
       "      <td>Москва</td>\n",
       "      <td>NaN</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "      <td>Волгоград</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>1980-02-13</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>NaN</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth       City  Position\n",
       "0      Иванов А.А. 1980-03-22     Москва       NaN\n",
       "1     Сорокин И.В. 1965-07-08  Волгоград   инженер\n",
       "2       Белов М.М. 1980-02-13     Ростов  менеджер\n",
       "3  Мельникова Д.С. 1985-04-15     Ростов       NaN\n",
       "4      Рыбина Е.П. 1985-11-19     Москва   инженер\n",
       "5     Костров С.О. 1985-05-31     Москва    стажер"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Name                object\n",
       "Birth       datetime64[ns]\n",
       "City                object\n",
       "Position            object\n",
       "dtype: object"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.dtypes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'pandas.core.frame.DataFrame'>\n",
      "Int64Index: 6 entries, 0 to 5\n",
      "Data columns (total 4 columns):\n",
      "Name        6 non-null object\n",
      "Birth       6 non-null datetime64[ns]\n",
      "City        6 non-null object\n",
      "Position    4 non-null object\n",
      "dtypes: datetime64[ns](1), object(3)\n",
      "memory usage: 240.0+ bytes\n"
     ]
    }
   ],
   "source": [
    "frame.info()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>1980-03-22</td>\n",
       "      <td>Москва</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "      <td>Волгоград</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>1980-02-13</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth       City      Position\n",
       "0      Иванов А.А. 1980-03-22     Москва  разнорабочий\n",
       "1     Сорокин И.В. 1965-07-08  Волгоград       инженер\n",
       "2       Белов М.М. 1980-02-13     Ростов      менеджер\n",
       "3  Мельникова Д.С. 1985-04-15     Ростов  разнорабочий\n",
       "4      Рыбина Е.П. 1985-11-19     Москва       инженер\n",
       "5     Костров С.О. 1985-05-31     Москва        стажер"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#заполнение пропущенных значений с помощью метода fillna\n",
    "frame.fillna('разнорабочий')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 65,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#заполнение пропущенных значений с помощью метода fillna (inplace)\n",
    "frame.Position.fillna('разнорабочий', inplace=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>1980-03-22</td>\n",
       "      <td>Москва</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "      <td>Волгоград</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>1980-02-13</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth       City      Position\n",
       "0      Иванов А.А. 1980-03-22     Москва  разнорабочий\n",
       "1     Сорокин И.В. 1965-07-08  Волгоград       инженер\n",
       "2       Белов М.М. 1980-02-13     Ростов      менеджер\n",
       "3  Мельникова Д.С. 1985-04-15     Ростов  разнорабочий\n",
       "4      Рыбина Е.П. 1985-11-19     Москва       инженер\n",
       "5     Костров С.О. 1985-05-31     Москва        стажер"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0    разнорабочий\n",
       "1         инженер\n",
       "2        менеджер\n",
       "3    разнорабочий\n",
       "4         инженер\n",
       "5          стажер\n",
       "Name: Position, dtype: object"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.Position"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "       Position\n",
       "0  разнорабочий\n",
       "1       инженер\n",
       "2      менеджер\n",
       "3  разнорабочий\n",
       "4       инженер\n",
       "5        стажер"
      ]
     },
     "execution_count": 30,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame[['Position']]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Position\n",
       "0      Иванов А.А.  разнорабочий\n",
       "1     Сорокин И.В.       инженер\n",
       "2       Белов М.М.      менеджер\n",
       "3  Мельникова Д.С.  разнорабочий\n",
       "4      Рыбина Е.П.       инженер\n",
       "5     Костров С.О.        стажер"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame[['Name', 'Position']]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>1980-03-22</td>\n",
       "      <td>Москва</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "      <td>Волгоград</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>1980-02-13</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>менеджер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "           Name      Birth       City      Position\n",
       "0   Иванов А.А. 1980-03-22     Москва  разнорабочий\n",
       "1  Сорокин И.В. 1965-07-08  Волгоград       инженер\n",
       "2    Белов М.М. 1980-02-13     Ростов      менеджер"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame[:3] #выбираем первые три записи"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth    City      Position\n",
       "3  Мельникова Д.С. 1985-04-15  Ростов  разнорабочий\n",
       "4      Рыбина Е.П. 1985-11-19  Москва       инженер\n",
       "5     Костров С.О. 1985-05-31  Москва        стажер"
      ]
     },
     "execution_count": 39,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame[-3:] #выбираем три послдение записи"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>City</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>Москва</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>Волгоград</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>Ростов</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "           Name       City\n",
       "0   Иванов А.А.     Москва\n",
       "1  Сорокин И.В.  Волгоград\n",
       "2    Белов М.М.     Ростов"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.loc[[0,1,2], [\"Name\", \"City\"]] #работает на основе имен"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth\n",
       "1     Сорокин И.В. 1965-07-08\n",
       "3  Мельникова Д.С. 1985-04-15\n",
       "5     Костров С.О. 1985-05-31"
      ]
     },
     "execution_count": 37,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.iloc[[1,3,5], [0,1]] #работает на основе позиций"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>City</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>Москва</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>Волгоград</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>Ростов</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "           Name       City\n",
       "0   Иванов А.А.     Москва\n",
       "1  Сорокин И.В.  Волгоград\n",
       "2    Белов М.М.     Ростов"
      ]
     },
     "execution_count": 40,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.ix[[0,1,2], [\"Name\", \"City\"]]  #поддерживает и имена и позиции (пример с именами)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>Иванов А.А.</td>\n",
       "      <td>1980-03-22</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Белов М.М.</td>\n",
       "      <td>1980-02-13</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "           Name      Birth\n",
       "0   Иванов А.А. 1980-03-22\n",
       "1  Сорокин И.В. 1965-07-08\n",
       "2    Белов М.М. 1980-02-13"
      ]
     },
     "execution_count": 46,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.ix[[0,1,2], [0,1]] #поддерживает и имена и позиции (пример с позициями)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth    City      Position\n",
       "3  Мельникова Д.С. 1985-04-15  Ростов  разнорабочий\n",
       "4      Рыбина Е.П. 1985-11-19  Москва       инженер\n",
       "5     Костров С.О. 1985-05-31  Москва        стажер"
      ]
     },
     "execution_count": 52,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#выбираем строки, которые удовлетворяют условию frame.Birth >= pd.datetime(1985,1,1)\n",
    "frame[frame.Birth >= pd.datetime(1985,1,1)]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth    City      Position\n",
       "3  Мельникова Д.С. 1985-04-15  Ростов  разнорабочий"
      ]
     },
     "execution_count": 56,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#выбираем строки, удовлетворяющие пересечению условий\n",
    "frame[(frame.Birth >= pd.datetime(1985,1,1)) &\n",
    "      (frame.City != 'Москва')]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 64,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name\n",
       "3  Мельникова Д.С."
      ]
     },
     "execution_count": 64,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "frame.loc[(frame.Birth >= pd.datetime(1985,1,1)) &\n",
    "      (frame.City != 'Москва'), ['Name']]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 66,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>Name</th>\n",
       "      <th>Birth</th>\n",
       "      <th>City</th>\n",
       "      <th>Position</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>Сорокин И.В.</td>\n",
       "      <td>1965-07-08</td>\n",
       "      <td>Волгоград</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>Мельникова Д.С.</td>\n",
       "      <td>1985-04-15</td>\n",
       "      <td>Ростов</td>\n",
       "      <td>разнорабочий</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>Рыбина Е.П.</td>\n",
       "      <td>1985-11-19</td>\n",
       "      <td>Москва</td>\n",
       "      <td>инженер</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>5</th>\n",
       "      <td>Костров С.О.</td>\n",
       "      <td>1985-05-31</td>\n",
       "      <td>Москва</td>\n",
       "      <td>стажер</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "</div>"
      ],
      "text/plain": [
       "              Name      Birth       City      Position\n",
       "1     Сорокин И.В. 1965-07-08  Волгоград       инженер\n",
       "3  Мельникова Д.С. 1985-04-15     Ростов  разнорабочий\n",
       "4      Рыбина Е.П. 1985-11-19     Москва       инженер\n",
       "5     Костров С.О. 1985-05-31     Москва        стажер"
      ]
     },
     "execution_count": 66,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#выбираем строки, удовлетворяющие объединению условий\n",
    "frame[(frame.Birth >= pd.datetime(1985,1,1)) |\n",
    "      (frame.City == 'Волгоград')]"
   ]
  }
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