simple python

programs.ipynb

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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Simple Programs\n",
    "\n",
    "The examples below will increase in number of lines of code and difficulty.\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 1 line ]__ Output\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "print('Hello, world!')\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 2 lines ]__ Input, assignment\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "name = 'Dany Dodson' \n",
    "# name = input('What is your name?\\n')\n",
    "\n",
    "print('Hi, %s.' % name)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 3 lines ]__ For loop, built-in enumerate function, new style formatting\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "friends = ['john', 'pat', 'gary', 'michael']\n",
    "\n",
    "for i, name in enumerate(friends):\n",
    "    print(\"iteration {iteration} is {name}\".format(iteration=i, name=name))\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 4 lines ]__ Fibonacci, tuple assignment\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "parents, babies = (1, 1)\n",
    "\n",
    "while babies < 100:\n",
    "    print('This generation has {0} babies'.format(babies))\n",
    "    parents, babies = (babies, parents + babies)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 5 lines ]__ Functions\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def greet(name):\n",
    "    print('Hello', name)\n",
    "\n",
    "\n",
    "greet('Jack')\n",
    "greet('Jill')\n",
    "greet('Bob')\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 6 lines ]__ Import, regular expressions\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import re\n",
    "\n",
    "for test_string in ['555-1212', 'ILL-EGAL']:\n",
    "    if re.match(r'^\\d{3}-\\d{4}$', test_string):\n",
    "        print(test_string, 'is a valid US local phone number')\n",
    "    else:\n",
    "        print(test_string, 'rejected')\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 7 lines ]__ Dictionaries, generator expressions\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "prices = {'apple': 0.40, 'banana': 0.50}\n",
    "\n",
    "my_purchase = {'apple': 1, 'banana': 6}\n",
    "\n",
    "grocery_bill = sum(prices[fruit] * my_purchase[fruit]\n",
    "                   for fruit in my_purchase)\n",
    "\n",
    "print('I owe the grocer $%.2f' % grocery_bill)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 8 lines ]__ Command line arguments, exception handling\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# This program adds up integers that have been passed as arguments in the command line\n",
    "\n",
    "import sys\n",
    "\n",
    "try:\n",
    "    total = sum(int(arg) for arg in sys.argv[1:])\n",
    "    print('sum =', total)\n",
    "except ValueError:\n",
    "    print('Please supply integer arguments')\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 9 lines ]__ Opening files\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# indent your Python code to put into an email\n",
    "import glob\n",
    "\n",
    "# glob supports Unix style pathname extensions\n",
    "python_files = glob.glob('*.py')\n",
    "\n",
    "for file_name in sorted(python_files):\n",
    "    print('    ------' + file_name)\n",
    "\n",
    "    with open(file_name) as f:\n",
    "        for line in f:\n",
    "            print('    ' + line.rstrip())\n",
    "\n",
    "    print()\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 10 lines ]__ Time, conditionals, from..import, for..else\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from time import localtime\n",
    "\n",
    "activities = {8: 'Sleeping',\n",
    "              9: 'Commuting',\n",
    "              17: 'Working',\n",
    "              18: 'Commuting',\n",
    "              20: 'Eating',\n",
    "              22: 'Resting'}\n",
    "\n",
    "time_now = localtime()\n",
    "hour = time_now.tm_hour\n",
    "\n",
    "for activity_time in sorted(activities.keys()):\n",
    "    if hour < activity_time:\n",
    "        print(activities[activity_time])\n",
    "        break\n",
    "else:\n",
    "    print('Unknown, AFK or sleeping!')\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "__[ 11 lines ]__ Triple-quoted strings, while loop\n",
    "\n",
    "---"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "REFRAIN = '''\n",
    "%d bottles of beer on the wall,\n",
    "%d bottles of beer,\n",
    "take one down, pass it around,\n",
    "%d bottles of beer on the wall!\n",
    "'''\n",
    "\n",
    "bottles_of_beer = 9\n",
    "\n",
    "while bottles_of_beer > 1:\n",
    "    print(REFRAIN % (bottles_of_beer, bottles_of_beer,\n",
    "                     bottles_of_beer - 1))\n",
    "    bottles_of_beer -= 1\n"
   ]
  }
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