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ZBZ_Exercise 4-13: Buffet #5

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228 changes: 200 additions & 28 deletions for-loops.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,19 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 1,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"odysseus\n",
"neoptolemus\n",
"philoctetes\n"
]
}
],
"source": [
"cast = [\"odysseus\", \"neoptolemus\", \"philoctetes\"]\n",
"\n",
Expand All @@ -38,7 +48,7 @@
"source": [
"Let's break this down:\n",
"\n",
"1. `cast = [\"Odysseus\", \"Neoptolemus\", \"Philoctetes\"]` declares a variable and assigns to it the list containing the `str`-names of the main cast of Sophocles' _Philoctetes_.\n",
"1. `cast = [\"odysseus\", \"neoptolemus\", \"philoctetes\"]` declares a variable and assigns to it the list containing the `str`-names of the main cast of Sophocles' _Philoctetes_.\n",
"2. `for character in cast:` opens a `for` loop, assigning each item in `cast` to the variable `character` — which is only defined inside the loop. The name `character` is unimportant — you could us any valid Pyhon variable. But it's good practice to use names that are descriptive of the contents.\n",
"3. ` print(character)` prints the `str`-name of each `character`. Notice the indentation!\n",
"\n",
Expand All @@ -47,11 +57,23 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 2,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"<built-in method title of str object at 0x70fb02b41670>\n",
"<built-in method title of str object at 0x70fb02b40ab0>\n",
"<built-in method title of str object at 0x70fb0217b7b0>\n"
]
}
],
"source": [
"# Hint: Use print(f\"{variable}\")"
"# Hint: Use print(f\"{variable}\")\n",
"for character in cast: \n",
" print(f\"{character.title}\")"
]
},
{
Expand All @@ -63,9 +85,20 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 3,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"odysseus\n",
"neoptolemus\n",
"philoctetes\n",
"And now the loop is done!\n"
]
}
],
"source": [
"cast = [\"odysseus\", \"neoptolemus\", \"philoctetes\"]\n",
"\n",
Expand Down Expand Up @@ -107,9 +140,22 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 5,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"odysseus\n",
"And now the loop is done!\n",
"neoptolemus\n",
"And now the loop is done!\n",
"philoctetes\n",
"And now the loop is done!\n"
]
}
],
"source": [
"cast = [\"odysseus\", \"neoptolemus\", \"philoctetes\"]\n",
"\n",
Expand All @@ -128,16 +174,30 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 4,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"odysseus\n",
"neoptolemus\n",
"philoctetes\n",
"antigone\n",
"antigone was played by a great actor!\n"
]
}
],
"source": [
"cast = [\"odysseus\", \"neoptolemus\", \"philoctetes\"]\n",
"cast = [\"odysseus\", \"neoptolemus\", \"philoctetes\", \"antigone\",]\n",
"\n",
"last_actor_seen = None\n",
"for character in cast:\n",
" last_actor_seen = character\n",
" print(character)\n",
"\n",
"print(f\"{character} was played by a great actor!\")"
"print(f\"{last_actor_seen} was played by a great actor!\")"
]
},
{
Expand All @@ -158,9 +218,20 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 6,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"1 is greater than 0\n",
"2 is greater than 1\n",
"3 is greater than 2\n",
"4 is greater than 3\n"
]
}
],
"source": [
"for value in range(1, 5):\n",
" print(f\"{value} is greater than {value - 1}\")"
Expand All @@ -175,19 +246,41 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 18,
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[0, 2, 4, 6, 8]"
]
},
"execution_count": 18,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# We can use the third argument to adjust the size of each step\n",
"list(range(0, 10, 2))"
]
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 7,
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]"
]
},
"execution_count": 7,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# Or we can pass `range()` just one argument, and it will start from 0:\n",
"list(range(10))"
Expand All @@ -204,9 +297,20 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 8,
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[2, 3, 4, 5, 6]"
]
},
"execution_count": 8,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"[value+2 for value in range(0, 5)]"
]
Expand All @@ -229,9 +333,19 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 22,
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[2, 3, 4, 5, 6, 7]\n",
"[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18]\n",
"[15, 16, 17, 18, 19]\n"
]
}
],
"source": [
"numbers = list(range(0, 20))\n",
"\n",
Expand Down Expand Up @@ -267,6 +381,15 @@
"If you specify a slice without any indexes, you'll get a copy of the list."
]
},
{
"cell_type": "code",
"execution_count": 23,
"metadata": {},
"outputs": [],
"source": [
"new_list = numbers[:]"
]
},
{
"cell_type": "markdown",
"metadata": {},
Expand All @@ -278,9 +401,21 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 21,
"metadata": {},
"outputs": [],
"outputs": [
{
"ename": "TypeError",
"evalue": "'tuple' object does not support item assignment",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mTypeError\u001b[0m Traceback (most recent call last)",
"Cell \u001b[0;32mIn[21], line 3\u001b[0m\n\u001b[1;32m 1\u001b[0m my_tuple \u001b[38;5;241m=\u001b[39m (\u001b[38;5;241m1\u001b[39m, \u001b[38;5;241m2\u001b[39m, \u001b[38;5;241m3\u001b[39m)\n\u001b[0;32m----> 3\u001b[0m \u001b[43mmy_tuple\u001b[49m\u001b[43m[\u001b[49m\u001b[38;5;241;43m1\u001b[39;49m\u001b[43m]\u001b[49m \u001b[38;5;241m=\u001b[39m \u001b[38;5;241m5\u001b[39m\n",
"\u001b[0;31mTypeError\u001b[0m: 'tuple' object does not support item assignment"
]
}
],
"source": [
"my_tuple = (1, 2, 3)\n",
"\n",
Expand All @@ -304,11 +439,48 @@
"\n",
"Matthes 2023, p. 67, Exercise 4-13."
]
},
{
"cell_type": "code",
"execution_count": 29,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Original Menu:\n",
"sushi\n",
"dumplings\n",
"rice\n",
"soup\n",
"salad\n",
"\n",
"Updated Menu:\n",
"sushi\n",
"dumplings\n",
"rice\n",
"chicken nuggets\n",
"ice cream\n"
]
}
],
"source": [
"foods = ('sushi', 'dumplings', 'rice', 'soup', 'salad')\n",
"print ('Original Menu:')\n",
"for food in foods:\n",
" print(food)\n",
"\n",
"foods = ('sushi', 'dumplings', 'rice', 'chicken nuggets', 'ice cream')\n",
"print(\"\\nUpdated Menu:\")\n",
"for food in foods:\n",
" print(food)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": ".venv",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -322,7 +494,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.12.7"
"version": "3.12.1"
}
},
"nbformat": 4,
Expand Down