Add current solutions.

uebungen.ipynb

@@ -1121,6 +1121,17 @@
    "source": [
     "# Fügen Sie hier Ihren Code für die Funktion ein.\n",
     "\n",
+    "def pascal(list_arg: list) -> list:\n",
+    "    result = [1]\n",
+    "\n",
+    "    if len(list_arg) > 1:\n",
+    "        result.extend([arg1+arg2 for arg1, arg2 in zip(list_arg[:-1], list_arg[1:])])\n",
+    "    \n",
+    "    if len(list_arg) > 0:\n",
+    "        result.append(1)\n",
+    "\n",
+    "    return result\n",
+    "\n",
     "print(pascal([]))\n",
     "print(pascal([5]))\n",
     "print(pascal([5, 2, 7, 3]))"
@@ -1143,7 +1154,37 @@
    "source": [
     "# Fügen Sie Ihren Code für die Funktion prim_sum_up_to ein.\n",
     "\n",
-    "print(prim_sum_up_to(100))"
+    "import timeit\n",
+    "\n",
+    "def is_prim(num):\n",
+    "    for div in range(2, num//2+1):\n",
+    "        if num % div == 0:\n",
+    "            return False\n",
+    "    return True\n",
+    "\n",
+    "def filter_prim(n):\n",
+    "    prims = [True for _ in range(n+1)]\n",
+    "\n",
+    "    prims[0] = False\n",
+    "    prims[1] = False\n",
+    "\n",
+    "    for idx, is_prim in enumerate(prims):\n",
+    "        if is_prim:\n",
+    "            for idx2 in range(idx*2, n+1, idx):\n",
+    "                prims[idx2] = False\n",
+    "\n",
+    "    return [idx for idx, elem in enumerate(prims) if elem]\n",
+    "\n",
+    "def prim_sum_up_to2(n):\n",
+    "    return sum(filter_prim(n))\n",
+    "\n",
+    "def prim_sum_up_to1(n):\n",
+    "     return sum([num for num in range(2, n+1) if is_prim(num)])\n",
+    "\n",
+    "#print(prim_sum_up_to1(20))\n",
+    "\n",
+    "print(timeit.timeit(lambda: prim_sum_up_to1(1000), number=1000))\n",
+    "print(timeit.timeit(lambda: prim_sum_up_to2(1000), number=1000))"
    ]
   },
   {
@@ -1169,7 +1210,19 @@
    "source": [
     "liste = [1, 'ABBA', 23.3, 45, 'Text', -123]\n",
     "\n",
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "\n",
+    "# list_dict = {}\n",
+    "\n",
+    "# for idx, elem in enumerate(liste):\n",
+    "#     list_dict[idx] = elem\n",
+    "\n",
+    "#list_dict = {0: 1, 1: 'ABBA', 2: 23.5, 3: 45, 4: 'Text', 5: -123}\n",
+    "\n",
+    "list_dict = {idx: value for idx, value in enumerate(liste)}\n",
+    "\n",
+    "for key in list_dict:\n",
+    "    print(f'{key} --> {list_dict[key]}')\n"
    ]
   },
   {
@@ -1199,7 +1252,27 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "\n",
+    "stud_dict = {}\n",
+    "\n",
+    "stud_id = -1\n",
+    "\n",
+    "while stud_id != 0:\n",
+    "    stud_id = int(input('Geben Sie eine Matrikelnummer ein: '))\n",
+    "\n",
+    "    if stud_id != 0:\n",
+    "        if stud_id in stud_dict.keys():\n",
+    "            print(f'Unter {stud_id} ist {stud_dict[stud_id]} gespeichert.')\n",
+    "        elif stud_id > 0:\n",
+    "            name = input('Geben Sie einen Namen an: ')\n",
+    "            stud_dict[stud_id] = name\n",
+    "            print(f'Unter {stud_id} wurde {name} gespeichert.')\n",
+    "        elif stud_id < 0 and -stud_id in stud_dict:\n",
+    "            del stud_dict[-stud_id]\n",
+    "            print(f'Eintrag {-stud_id} wurde gelöscht.')\n",
+    "        else:\n",
+    "            print('Unbekannte Matrikelnummer.')"
    ]
   },
   {
@@ -1232,7 +1305,12 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "altes_dict = {'a': 1, 'b': 2, 'c': 3, 'd': 3}\n",
+    "neues_dict = {altes_dict[key]: key for key in altes_dict}\n",
+    "\n",
+    "print(altes_dict)\n",
+    "print(neues_dict)"
    ]
   },
   {
@@ -1273,7 +1351,24 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "\n",
+    "freq_dict = {}\n",
+    "\n",
+    "#is_freq_3 = False\n",
+    "\n",
+    "while 3 not in freq_dict.values():\n",
+    "    input_line = input('Eingabe: ')\n",
+    "\n",
+    "    if input_line not in freq_dict:\n",
+    "        freq_dict[input_line] = 0\n",
+    "    \n",
+    "    freq_dict[input_line] += 1\n",
+    "\n",
+    "    #freq_dict[input_line] = freq_dict.get(input_line, default=0) + 1\n",
+    "\n",
+    "for line in freq_dict:\n",
+    "    print(f'Die Eingabe {line} wurde {freq_dict[line]}-mal getätigt.')"
    ]
   },
   {
@@ -1302,7 +1397,17 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "\n",
+    "some_dict = {'a': 'ein wert'}\n",
+    "\n",
+    "def get_it_or_none1(some_dict, key):\n",
+    "    if key in some_dict:\n",
+    "        return key\n",
+    "    else:\n",
+    "        return None\n",
+    "\n",
+    "print(get_it_or_none1(some_dict, 'b'))"
    ]
   },
   {
@@ -1320,7 +1425,15 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "\n",
+    "def get_it_or_none2(some_dict, key):\n",
+    "    try:\n",
+    "        return some_dict[key]\n",
+    "    except:\n",
+    "        return None\n",
+    "\n",
+    "print(get_it_or_none2(some_dict, 'b'))\n"
    ]
   },
   {
@@ -1339,7 +1452,9 @@
    "source": [
     "import timeit\n",
     "\n",
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "print(timeit.timeit(lambda: get_it_or_none1(some_dict, 'b'), number=100000))\n",
+    "print(timeit.timeit(lambda: get_it_or_none2(some_dict, 'b'), number=100000))"
    ]
   },
   {
@@ -1361,7 +1476,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Fügen Sie hier Ihren Code ein."
+    "# Fügen Sie hier Ihren Code ein.\n",
+    "print(timeit.timeit(lambda: some_dict.get('b', None), number=1000))"
    ]
   },
   {
@@ -1378,6 +1494,26 @@
     "## 8. <a id='toc8_'></a>[Aufgabengruppe Module](#toc0_)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%pip install matplotlib\n",
+    "%pip install numpy\n",
+    "\n",
+    "import matplotlib.pyplot as plt\n",
+    "import numpy as np\n",
+    "\n",
+    "x_vals = np.linspace(-5, 5, 1000)\n",
+    "cos_vals = np.cos(x_vals)\n",
+    "\n",
+    "plt.figure()\n",
+    "plt.plot(x_vals, cos_vals, '-')\n",
+    "plt.show()"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},