{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "FGV - Escola de Matemática Aplicada\n",
    "==\n",
    "Introdução à Programação com a Linguagem Python\n",
    "--"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Escopos em Python"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "local2\n",
      "local1\n",
      "global\n"
     ]
    }
   ],
   "source": [
    "x = 'global'\n",
    "def local1():\n",
    "    x = 'local1'\n",
    "    def local2():\n",
    "        x = 'local2'\n",
    "        print(x)\n",
    "    local2()    \n",
    "    print(x)\n",
    "local1()\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "sexta chamada fulano\n",
      "primeira chamada sicrano\n",
      "quarta chamada sicrano\n",
      "segunda chamada fulano\n",
      "terceira chamada beltrano\n",
      "quinta chamada beltrano\n",
      "setima chamada None\n"
     ]
    }
   ],
   "source": [
    "x = 'fulano'\n",
    "\n",
    "def escopo1():\n",
    "    x = 'sicrano'\n",
    "    print('primeira chamada {}'.format(x))\n",
    "    def escopo2():\n",
    "        global x\n",
    "        print('segunda chamada {}'.format(x))\n",
    "        x = 'beltrano'\n",
    "        print('terceira chamada {}'.format(x))\n",
    "        #print(x)\n",
    "        return x\n",
    "    print('quarta chamada {}'.format(x))\n",
    "    x = escopo2()\n",
    "    print('quinta chamada {}'.format(x))\n",
    "    \n",
    "    \n",
    "print('sexta chamada {}'.format(x))\n",
    "x = escopo1()\n",
    "print('setima chamada {}'.format(x))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "global\n"
     ]
    }
   ],
   "source": [
    "x = 'global'\n",
    "def passagem(z):\n",
    "    x = 'local'\n",
    "    if type(z) == str:\n",
    "        print(z)\n",
    "    else:\n",
    "        print('o parâmetro deve ser do tipo string')\n",
    "\n",
    "passagem(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3\n"
     ]
    }
   ],
   "source": [
    "x = 1\n",
    "\n",
    "def soma_1(x):\n",
    "    x += 1\n",
    "    def soma_mais_um(x):\n",
    "        x += 1\n",
    "        return x\n",
    "    x = soma_mais_um(x)\n",
    "    return x\n",
    "\n",
    "x = soma_1(x)\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "str"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "type(x)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Recordando: métodos de tipos mutáveis e métodos de tipos imutáveis"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 2, 3, 4]\n"
     ]
    }
   ],
   "source": [
    "lista = [1,2,3]\n",
    "\n",
    "def acrescenta(uma_lista):\n",
    "    uma_lista.append(4)\n",
    "    return uma_lista\n",
    "\n",
    "lista = acrescenta(lista)\n",
    "print(lista)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 2, 3, 4]\n"
     ]
    }
   ],
   "source": [
    "lista = [1,2,3]\n",
    "\n",
    "def acrescenta(uma_lista):\n",
    "    uma_lista.append(4)\n",
    "\n",
    "acrescenta(lista)\n",
    "print(lista)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 2, 3, 4]\n"
     ]
    }
   ],
   "source": [
    "lista = [1,2,3]\n",
    "\n",
    "def acrescenta():\n",
    "    lista.append(4)\n",
    "\n",
    "acrescenta()\n",
    "print(lista)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "None\n"
     ]
    }
   ],
   "source": [
    "lista = [1,2,3]\n",
    "lista = lista.append(4)\n",
    "print(lista)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "None\n",
      "[1, 2, 3]\n"
     ]
    }
   ],
   "source": [
    "l = [3,2,1]\n",
    "m = l.sort()\n",
    "print(m)\n",
    "print(l)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Renato\n",
      "RENATO\n"
     ]
    }
   ],
   "source": [
    "s = 'Renato'\n",
    "z = s.upper()\n",
    "print(s)\n",
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "After local assignment: test spam\n",
      "After nonlocal assignment: nonlocal spam\n",
      "After global assignment: nonlocal spam\n",
      "In global scope: global spam\n"
     ]
    }
   ],
   "source": [
    "def scope_test():\n",
    "    def do_local():\n",
    "        spam = \"local spam\"\n",
    "        \n",
    "    def do_nonlocal():\n",
    "        nonlocal spam\n",
    "        spam = \"nonlocal spam\"\n",
    "        \n",
    "    def do_global():\n",
    "        global spam\n",
    "        spam = \"global spam\"\n",
    "        \n",
    "    spam = \"test spam\"\n",
    "    do_local()\n",
    "\n",
    "    print(\"After local assignment:\", spam)\n",
    "    do_nonlocal()\n",
    "    print(\"After nonlocal assignment:\", spam)\n",
    "    do_global()\n",
    "    print(\"After global assignment:\", spam)\n",
    "\n",
    "scope_test()\n",
    "print(\"In global scope:\", spam)"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.6"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}