Fix some mistakes in slides for session 2

Thanks for the attentive audience pointing out the mistakes!

Author: lumbric

session2_python_and_programming/slides_session2.ipynb

@@ -22,7 +22,7 @@
     "# How to make code beautiful\n",
     "### Python beyond basics\n",
     "\n",
-    "<br><br><br><br><br><br>\n",
+    "<br><br><br><br><br><br><br><br><br><br><br><br>\n",
     "<div style=\"font-size:0.8em; color: #555\">2019-04-03 Session 2\n",
     "<span style=\"float:right\">Peter Regner</span>\n",
     "</div>"
@@ -262,11 +262,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "metadata": {
-    "slideshow": {
-     "slide_type": "fragment"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "import antigravity"
@@ -283,7 +279,7 @@
    "outputs": [],
    "source": [
     "import sys\n",
-    "if 'this' in sys.modules:\n",
+    "if 'antigravity' in sys.modules:\n",
     "    del sys.modules['antigravity']"
    ]
   },
@@ -474,18 +470,14 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Way better! Great! 👍\n"
-     ]
+   "metadata": {
+    "slideshow": {
+     "slide_type": "fragment"
     }
-   ],
+   },
+   "outputs": [],
    "source": [
-    "twitter_search('obama', numtweets=0, retweets=False, unicode=True)"
+    "ts('obama', False, 20, True)"
    ]
   },
   {
@@ -1834,27 +1826,12 @@
      "slide_type": "skip"
     }
    },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Populating the interactive namespace from numpy and matplotlib\n"
-     ]
-    },
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "/home/peter/.local/lib/python3.6/site-packages/IPython/core/magics/pylab.py:160: UserWarning: pylab import has clobbered these variables: ['f', 'datetime']\n",
-      "`%matplotlib` prevents importing * from pylab and numpy\n",
-      "  \"\\n`%matplotlib` prevents importing * from pylab and numpy\"\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
-    "from scipy.interpolate import interp1d\n",
-    "%pylab inline"
+    "%matplotlib inline\n",
+    "import numpy as np\n",
+    "import matplotlib.pyplot as plt\n",
+    "from scipy.interpolate import interp1d"
    ]
   },
   {
@@ -1919,7 +1896,7 @@
     "def plot_func(func):\n",
     "    x = np.linspace(0, 4, num=20)\n",
     "    y = func(x)\n",
-    "    plot(x, y, 'o-')\n",
+    "    plt.plot(x, y, 'o-')\n",
     "    \n",
     "plot_func(power_curve)"
    ]
@@ -3558,7 +3535,7 @@
     "def print_meaning():\n",
     "    print(42)\n",
     "    \n",
-    "print_meaning()"
+    "call_print_meaning()"
    ]
   },
   {
@@ -4158,7 +4135,7 @@
    },
    "outputs": [],
    "source": [
-    "with open('turbine_models.csv') as f:\n",
+    "with open('data-samples/turbine_models.csv') as f:\n",
     "    1/0"
    ]
   },
@@ -5287,8 +5264,8 @@
     "\n",
     "\n",
     "- empty tuple: **`()`**\n",
-    "- list with one element: **`(42,)`** or in some case allowed **`42,`**\n",
-    "- list with many elements: **`(1,2,3)`** or **`(1,2,3,)`** or in some cases allowed **`1,2,3`** or **`1,2,3,`**"
+    "- tuple with one element: **`(42,)`** or in some case allowed **`42,`**\n",
+    "- tuple with many elements: **`(1,2,3)`** or **`(1,2,3,)`** or in some cases allowed **`1,2,3`** or **`1,2,3,`**"
    ]
   },
   {