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   "source": [
    "# Q&A, Part II\n",
    "\n",
    "CSCI 1360: Foundations for Informatics and Analytics"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "Reverse the keys and values in a dictionary (make the keys the values, and the values the keys)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "I define a child class. Instead of wholesale overriding parent behavior, however, I merely want to *augment* it. How can I do this without re-implementing code in the parent?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "How does Python resolve multiple inheritance collisions? (i.e. methods with the same name in multiple parent classes)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "source": [
    "(Good starting point: http://stackoverflow.com/questions/3277367/how-does-pythons-super-work-with-multiple-inheritance)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "Name the two types of variable scope in Python. Name the three [four] specific environments which determine these scopes."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
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   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
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     "slide_type": "slide"
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   },
   "source": [
    "What does the following code print:"
   ]
  },
  {
   "cell_type": "code",
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   "metadata": {
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   "source": [
    "class Vehicle():\n",
    "    def __init__(self, name):\n",
    "        self.name = name\n",
    "        print(\"I am a {}.\".format(self.name))\n",
    "        \n",
    "    def drive(self, mileage):\n",
    "        print(\"I drove {} miles.\".format(mileage))\n",
    "\n",
    "class Car(Vehicle):\n",
    "    def drive(self, mileage, passengers):\n",
    "        print(\"I have {} passengers.\".format(passengers))\n",
    "        super(Car, self).drive(mileage)\n",
    "    \n",
    "class BMW(Car):\n",
    "    def __init__(self, model, year):\n",
    "        self.model = model\n",
    "        self.year = year\n",
    "        super(BMW, self).__init__(model)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
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    "slideshow": {
     "slide_type": "fragment"
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   },
   "outputs": [],
   "source": [
    "bmw = BMW(\"Roadster\", 2016)\n",
    "bmw.drive(10, 3)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "Write a single loop that simultaneously prints three lists which may or may not be the same length."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "Flip the type of loop you used in the previous question (if you used a `for` loop, use a `while` loop here to answer the same thing, and vice versa)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "What is \"unpacking\"? Give an example."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "How can you test if a specific value `x` is in a list? How can you test if a specific value `x` is NOT in a list?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "Explain the resulting data structure from the code below. Why would it be useful?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
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   },
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "\n",
    "list1 = np.random.random(10).tolist()\n",
    "list2 = np.random.randint(100, 10).tolist()\n",
    "\n",
    "data_structure = enumerate(zip(list1, list2))  # What is this?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "Draw and describe a list-of-lists that each contain lists (a 3D \"cube\")."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "What happens in the following code?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
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   "outputs": [],
   "source": [
    "x = 2\n",
    "\n",
    "def f(x):\n",
    "    y = x ** 2\n",
    "    x = x ** 2\n",
    "    return y\n",
    "\n",
    "y = f(x)\n",
    "x = f(y)\n",
    "\n",
    "# What is x?\n",
    "# What is y?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "slideshow": {
     "slide_type": "slide"
    }
   },
   "source": [
    "What happens in the following code?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "slideshow": {
     "slide_type": "fragment"
    }
   },
   "outputs": [],
   "source": [
    "def g(x, y):\n",
    "    x[0] *= x[1]\n",
    "    z = y.copy()\n",
    "    z[0] *= x[1]\n",
    "    return z\n",
    "\n",
    "x = [1, 2]\n",
    "y = [3, 4]\n",
    "x = g(y, x)\n",
    "\n",
    "# What are x and y?"
   ]
  }
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