finish up file handling and user input

Author: ProbablyComputingSquid

File_Handling_and_Packages.ipynb

@@ -4,7 +4,7 @@
    "metadata": {},
    "cell_type": "markdown",
    "source": [
-    "# Packages and File Handling\n",
+    "# Packages, File Handling, and User Input\n",
     "\n",
     "> _Why bother reinventing the wheel when someone else has already done the work for you? ~ unknown, c. 2019, in conversation_\n",
     "\n",
@@ -90,6 +90,88 @@
    ],
    "execution_count": 18
   },
+  {
+   "metadata": {},
+   "cell_type": "markdown",
+   "source": [
+    "## user input\n",
+    "\n",
+    "OKAY so like a huge part of designing programs that people uh actually use is user input. im lowk not sure why i didnt put this earlier but you kinda gotta know some other basics before you can really use it well. Also, there just wasn't room.\n",
+    "\n",
+    "User input in desktop applications will be covered in a later lesson, however we'll be covering terminal user input now.\n",
+    "\n",
+    "User input in python is handled with the `input()` function. What the user submits will be stored in a variable, if you choose to handle the output."
+   ],
+   "id": "1386a34ef7e2caa5"
+  },
+  {
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2025-08-26T20:46:16.343963Z",
+     "start_time": "2025-08-26T20:46:08.795884Z"
+    }
+   },
+   "cell_type": "code",
+   "source": [
+    "print(\"What's your favorite ice cream flavor?\")\n",
+    "flavor = input()\n",
+    "print(flavor + \"? That's a good one\") # blatant lie"
+   ],
+   "id": "b4012e73454f47df",
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "What's your favorite ice cream flavor?\n",
+      "chocolate? That's a good one\n"
+     ]
+    }
+   ],
+   "execution_count": 2
+  },
+  {
+   "metadata": {},
+   "cell_type": "markdown",
+   "source": [
+    "However, it is possible to prompt the user with the input function in order to give them a question instead of just a blank line. The input function accepts parameters so you can directly prompt the user.\n",
+    "You can also just do a blank `input()` and disregard the output as a \"Press enter to continue\" thing."
+   ],
+   "id": "3d5fd8e4d073a927"
+  },
+  {
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2025-08-26T20:58:26.554073Z",
+     "start_time": "2025-08-26T20:58:21.866381Z"
+    }
+   },
+   "cell_type": "code",
+   "source": [
+    "pet = input(\"Do you have any pets?\")\n",
+    "print(\"You have a \" + pet + \"? Omg so do i!! i have 500 \" + pet + \"s!\") # me when i lie"
+   ],
+   "id": "c0e9188ae8a2c0c3",
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "You have a no? Omg so do i!! i have 500 nos!\n"
+     ]
+    }
+   ],
+   "execution_count": 3
+  },
+  {
+   "metadata": {},
+   "cell_type": "markdown",
+   "source": [
+    "if you think about it, file handling is just like user input from the computer (right?) kinda... not really...\n",
+    "But you could even chain the two together to have the program read from a file of the user's choice, essentially uploading the file to your python program. with out further adieu, let us transition (heh) to file handling!"
+   ],
+   "id": "105879e1945829e3"
+  },
   {
    "metadata": {},
    "cell_type": "markdown",
@@ -132,10 +214,53 @@
     "\n",
     "There are several other modes you can use when opening a file:\n",
     "- `\"r\"`: read mode (default). This mode is used to read data from a file. If the file doesn't exist, an error will be raised. Good for reading in data.\n",
-    "- `\"a\"`: append mode. This mode is used to add data to the end of a file. If the file doesn't exist, it will be created. Good for adding data to a file without overwriting existing data, like a log file or user data.\n",
-    "-"
+    "- `\"a\"`: append mode. This mode is used to add data to the end of a file. If the file doesn't exist, it will be created. Good for adding data to a file without overwriting existing data, like a log file or user data."
    ],
    "id": "670fa24c371c3fbb"
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "outputs": [],
+   "execution_count": null,
+   "source": [
+    "with open(\"example.txt\", \"a\") as f:\n",
+    "    f.write(\"I'm appending this!\")"
+   ],
+   "id": "3cb3750872150b82"
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "outputs": [],
+   "execution_count": null,
+   "source": [
+    "with open(\"example.txt\", \"r\") as f:\n",
+    "    content = f.read()\n",
+    "    print(content)"
+   ],
+   "id": "30fec8d8afca341f"
+  },
+  {
+   "metadata": {},
+   "cell_type": "markdown",
+   "source": [
+    "### practice exercise: reading a user selected file\n",
+    "\n",
+    "write code that will prompt the user for a filename, and open that file. then, prompt the user for some new content, and write that to a different user-selected file"
+   ],
+   "id": "ed4b14a7b0a35350"
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "outputs": [],
+   "execution_count": null,
+   "source": [
+    "# write your code here!\n",
+    "# you can use example.txt for practice."
+   ],
+   "id": "a03d6b6716f8ded8"
   }
  ],
  "metadata": {