Merge branch 'main' of git.doit.wisc.edu:cdis/cs/courses/cs220/cs220-lecture-material

cda9a0f5 · msyamkumar · 90906987 · 95549b7f · cda9a0f5 · cda9a0f5
Commit cda9a0f5 authored 2 years ago by msyamkumar
--- a/f22/andy_lec_notes/lec15_Oct12_CSV_Files/amfam_survey_data.csv
+++ b/f22/andy_lec_notes/lec15_Oct12_CSV_Files/amfam_survey_data.csv
+pizza topping,state,years,sleep preference,month,pets,lat-long
+mushroom,Florida,7,early bird,March,,"30.263214888389417, -81.54792098150529"
+pineapple,Wisconsin,4,night owl,April,other,"43.1581437, -89.2921125"
+sausage,Wisconsin,10,early bird,July,other,"43.15645, -89.28814"
+pepperoni,WI,7,no preference,September,"dog,cat","43.073051, -89.401230"
+mushroom,madison,7,early bird,November,,
+pepperoni,FL,1,no preference,December,dog,"42.35623761108948, -71.05691488946681"
+pepperoni,Wisconsin,2,night owl,February,,"43.159045128642774, -89.29146323507756"
+mushroom,Florida,0.5,night owl,May,other,"43.160601, -89.287671"
+mushroom,Wisconsin,10,no preference,January,"dog,fish","43.1562216,-89.2880086"
+pineapple,Wisconsin,8,night owl,July,dog,"43.158655, -89.289895"
+sausage,Minnesota,15,no preference,August,"dog,cat","45.13881645889933, -93.47636590830673"
+pepperoni,New Jersey,1,night owl,May,other,"43.07148896663423, -89.40567798752735"
+basil,Rhode Island,1,night owl,March,dog,"43.156490793353775, -89.28796434617352"
+mushroom,TX,1,no preference,January,dog,
+pineapple,Florida,3,early bird,July,other,"27.979191147972834, -82.33356380365498"
+sausage,Wisconsin,0,early bird,December,"dog,cat","43.15631441766965, -89.28785659081201"
+pineapple,Wisconsin,6,no preference,June,dog,"43.157716440341964, -89.28939262164963"
+mushroom,Florida,7,no preference,July,other,"30.053546, -81.514610"
+sausage,Florida,3,early bird,January,"dog,fish","30.263357, -81.547884"
+mac&cheese,Wisconsin,5,night owl,July,dog,"43.158328032172754, -89.28946714938327"
+pepperoni,Wisconsin,10,early bird,April,other,"43.1884213,-89.2762121"
+other,Wisconsin,10,early bird,August,other,"43.15833, -89.28988"
+sausage,WI,14,night owl,September,"dog,cat","43.15733597381252, -89.29013010509833"
+sausage,Wisconsin,6,no preference,August,"dog,cat","43.159061371631616, -89.29141118826759"
+pepperoni,Wisconsin,8,early bird,September,"dog,cat,fish",43.158359 -89.289972
+pineapple,Florida,8,night owl,October,,"30.263432655702932, -81.54807118535949"
+pineapple,TX,4,night owl,October,dog,"42.3558293029345, -71.05683171712127"
+other,WI,2,early bird,June,,
+mushroom,Wisconsin,20,early bird,September,dog,"43.15826500058843, -89.28945716165009"
+sausage,Wisconsin,8,night owl,June,dog,"43.15839022178169, -89.28998287477457"
+sausage,Wisconsin,20,night owl,April,bird,"43.15648555750267, -89.28783647996661"
+pineapple,Texas,0.5,early bird,August,other,"43, 89"
\ No newline at end of file
--- a/f22/andy_lec_notes/lec15_Oct12_CSV_Files/lec15_csvfiles_completed.ipynb
+++ b/f22/andy_lec_notes/lec15_Oct12_CSV_Files/lec15_csvfiles_completed.ipynb
--- a/f22/andy_lec_notes/lec_15/lec15_csvfiles_template.ipynb
+++ b/f22/andy_lec_notes/lec_15/lec15_csvfiles_template.ipynb
@@ -2,7 +2,7 @@
 "cells": [
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
@@ -16,45 +16,36 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 15,
   "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "peanut butter is dairy\n",
+      "milk is dairy\n",
+      "bread is dairy\n",
+      "cheese is dairy\n",
+      "YOGURT is dairy\n"
+     ]
+    }
+   ],
   "source": [
    "# Warmup #2:  Because a list is a sequence, we can use the 'in' operator\n",
    "food_shelf = [\"peanut butter\", \"milk\", \"bread\", \"cheese\", \"YOGURT\"]\n",
    "for item in food_shelf:\n",
-    "    if ???:\n",
+    "    if ... : \n",
    "        print(item, \"is dairy\")\n",
    "    else:\n",
    "        print(item, \"is not dairy\")"
   ]
  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Warmup #3: finish Monday's lecture problems\n"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Warmup #4: Open cs220_survey_data.csv from your Desktop\n",
-    "# Take notes here\n",
-    "\n",
-    "# Look at the slides for today"
-   ]
-  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
-    "# CS220: Lecture 15\n",
+    "# Lecture 15: CSV Files\n",
    "\n",
    "\n",
    "## Learning Objectives\n",
@@ -72,10 +63,14 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
   "metadata": {},
   "outputs": [],
-   "source": []
+   "source": [
+    "# Open the file of student survey data in Jupyter\n",
+    "\n",
+    "# Then open it in Windows ... what program opened? "
+   ]
  },
  {
   "cell_type": "markdown",
@@ -86,7 +81,7 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 17,
   "metadata": {},
   "outputs": [],
   "source": [
@@ -110,13 +105,13 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "\n",
-    "# copied from https://automatetheboringstuff.com/chapter14/\n",
+    "# inspired by https://automatetheboringstuff.com/chapter14/\n",
    "import csv\n",
    "\n",
    "def process_csv(filename):\n",
@@ -138,20 +133,68 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
   "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[['pizza topping',\n",
+       "  'state',\n",
+       "  'years',\n",
+       "  'sleep preference',\n",
+       "  'month',\n",
+       "  'pets',\n",
+       "  'lat-long'],\n",
+       " ['mushroom',\n",
+       "  'Florida',\n",
+       "  '7',\n",
+       "  'early bird',\n",
+       "  'March',\n",
+       "  '',\n",
+       "  '30.263214888389417, -81.54792098150529'],\n",
+       " ['pineapple',\n",
+       "  'Wisconsin',\n",
+       "  '4',\n",
+       "  'night owl',\n",
+       "  'April',\n",
+       "  'other',\n",
+       "  '43.1581437, -89.2921125']]"
+      ]
+     },
+     "execution_count": 19,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
   "source": [
    "# Call the process_csv function and store the list of lists in cs220_csv\n",
-    "cs220_csv = process_csv('cs220_survey_data.csv')\n",
+    "cs220_csv = process_csv('amfam_survey_data.csv')\n",
-    "cs220_csv"
+    "cs220_csv[:3]"
   ]
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
   "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['pizza topping',\n",
+       " 'state',\n",
+       " 'years',\n",
+       " 'sleep preference',\n",
+       " 'month',\n",
+       " 'pets',\n",
+       " 'lat-long']"
+      ]
+     },
+     "execution_count": 20,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
   "source": [
    "# Store the header row into cs220_header\n",
    "cs220_header = cs220_csv[0]\n",
@@ -160,9 +203,219 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 21,
   "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[['mushroom',\n",
+       "  'Florida',\n",
+       "  '7',\n",
+       "  'early bird',\n",
+       "  'March',\n",
+       "  '',\n",
+       "  '30.263214888389417, -81.54792098150529'],\n",
+       " ['pineapple',\n",
+       "  'Wisconsin',\n",
+       "  '4',\n",
+       "  'night owl',\n",
+       "  'April',\n",
+       "  'other',\n",
+       "  '43.1581437, -89.2921125'],\n",
+       " ['sausage',\n",
+       "  'Wisconsin',\n",
+       "  '10',\n",
+       "  'early bird',\n",
+       "  'July',\n",
+       "  'other',\n",
+       "  '43.15645, -89.28814'],\n",
+       " ['pepperoni',\n",
+       "  'WI',\n",
+       "  '7',\n",
+       "  'no preference',\n",
+       "  'September',\n",
+       "  'dog,cat',\n",
+       "  '43.073051, -89.401230'],\n",
+       " ['mushroom', 'madison', '7', 'early bird', 'November', '', ''],\n",
+       " ['pepperoni',\n",
+       "  'FL',\n",
+       "  '1',\n",
+       "  'no preference',\n",
+       "  'December',\n",
+       "  'dog',\n",
+       "  '42.35623761108948, -71.05691488946681'],\n",
+       " ['pepperoni',\n",
+       "  'Wisconsin',\n",
+       "  '2',\n",
+       "  'night owl',\n",
+       "  'February',\n",
+       "  '',\n",
+       "  '43.159045128642774, -89.29146323507756'],\n",
+       " ['mushroom',\n",
+       "  'Florida',\n",
+       "  '0.5',\n",
+       "  'night owl',\n",
+       "  'May',\n",
+       "  'other',\n",
+       "  '43.160601, -89.287671'],\n",
+       " ['mushroom',\n",
+       "  'Wisconsin',\n",
+       "  '10',\n",
+       "  'no preference',\n",
+       "  'January',\n",
+       "  'dog,fish',\n",
+       "  '43.1562216,-89.2880086'],\n",
+       " ['pineapple',\n",
+       "  'Wisconsin',\n",
+       "  '8',\n",
+       "  'night owl',\n",
+       "  'July',\n",
+       "  'dog',\n",
+       "  '43.158655, -89.289895'],\n",
+       " ['sausage',\n",
+       "  'Minnesota',\n",
+       "  '15',\n",
+       "  'no preference',\n",
+       "  'August',\n",
+       "  'dog,cat',\n",
+       "  '45.13881645889933, -93.47636590830673'],\n",
+       " ['pepperoni',\n",
+       "  'New Jersey',\n",
+       "  '1',\n",
+       "  'night owl',\n",
+       "  'May',\n",
+       "  'other',\n",
+       "  '43.07148896663423, -89.40567798752735'],\n",
+       " ['basil',\n",
+       "  'Rhode Island',\n",
+       "  '1',\n",
+       "  'night owl',\n",
+       "  'March',\n",
+       "  'dog',\n",
+       "  '43.156490793353775, -89.28796434617352'],\n",
+       " ['mushroom', 'TX', '1', 'no preference', 'January', 'dog', ''],\n",
+       " ['pineapple',\n",
+       "  'Florida',\n",
+       "  '3',\n",
+       "  'early bird',\n",
+       "  'July',\n",
+       "  'other',\n",
+       "  '27.979191147972834, -82.33356380365498'],\n",
+       " ['sausage',\n",
+       "  'Wisconsin',\n",
+       "  '0',\n",
+       "  'early bird',\n",
+       "  'December',\n",
+       "  'dog,cat',\n",
+       "  '43.15631441766965, -89.28785659081201'],\n",
+       " ['pineapple',\n",
+       "  'Wisconsin',\n",
+       "  '6',\n",
+       "  'no preference',\n",
+       "  'June',\n",
+       "  'dog',\n",
+       "  '43.157716440341964, -89.28939262164963'],\n",
+       " ['mushroom',\n",
+       "  'Florida',\n",
+       "  '7',\n",
+       "  'no preference',\n",
+       "  'July',\n",
+       "  'other',\n",
+       "  '30.053546, -81.514610'],\n",
+       " ['sausage',\n",
+       "  'Florida',\n",
+       "  '3',\n",
+       "  'early bird',\n",
+       "  'January',\n",
+       "  'dog,fish',\n",
+       "  '30.263357, -81.547884'],\n",
+       " ['mac&cheese',\n",
+       "  'Wisconsin',\n",
+       "  '5',\n",
+       "  'night owl',\n",
+       "  'July',\n",
+       "  'dog',\n",
+       "  '43.158328032172754, -89.28946714938327'],\n",
+       " ['pepperoni',\n",
+       "  'Wisconsin',\n",
+       "  '10',\n",
+       "  'early bird',\n",
+       "  'April',\n",
+       "  'other',\n",
+       "  '43.1884213,-89.2762121'],\n",
+       " ['other',\n",
+       "  'Wisconsin',\n",
+       "  '10',\n",
+       "  'early bird',\n",
+       "  'August',\n",
+       "  'other',\n",
+       "  '43.15833, -89.28988'],\n",
+       " ['sausage',\n",
+       "  'WI',\n",
+       "  '14',\n",
+       "  'night owl',\n",
+       "  'September',\n",
+       "  'dog,cat',\n",
+       "  '43.15733597381252, -89.29013010509833'],\n",
+       " ['sausage',\n",
+       "  'Wisconsin',\n",
+       "  '6',\n",
+       "  'no preference',\n",
+       "  'August',\n",
+       "  'dog,cat',\n",
+       "  '43.159061371631616, -89.29141118826759'],\n",
+       " ['pepperoni',\n",
+       "  'Wisconsin',\n",
+       "  '8',\n",
+       "  'early bird',\n",
+       "  'September',\n",
+       "  'dog,cat,fish',\n",
+       "  '43.158359 -89.289972'],\n",
+       " ['pineapple',\n",
+       "  'Florida',\n",
+       "  '8',\n",
+       "  'night owl',\n",
+       "  'October',\n",
+       "  '',\n",
+       "  '30.263432655702932, -81.54807118535949'],\n",
+       " ['pineapple',\n",
+       "  'TX',\n",
+       "  '4',\n",
+       "  'night owl',\n",
+       "  'October',\n",
+       "  'dog',\n",
+       "  '42.3558293029345, -71.05683171712127'],\n",
+       " ['other', 'WI', '2', 'early bird', 'June', '', ''],\n",
+       " ['mushroom',\n",
+       "  'Wisconsin',\n",
+       "  '20',\n",
+       "  'early bird',\n",
+       "  'September',\n",
+       "  'dog',\n",
+       "  '43.15826500058843, -89.28945716165009'],\n",
+       " ['sausage',\n",
+       "  'Wisconsin',\n",
+       "  '8',\n",
+       "  'night owl',\n",
+       "  'June',\n",
+       "  'dog',\n",
+       "  '43.15839022178169, -89.28998287477457'],\n",
+       " ['sausage',\n",
+       "  'Wisconsin',\n",
+       "  '20',\n",
+       "  'night owl',\n",
+       "  'April',\n",
+       "  'bird',\n",
+       "  '43.15648555750267, -89.28783647996661'],\n",
+       " ['pineapple', 'Texas', '0.5', 'early bird', 'August', 'other', '43, 89']]"
+      ]
+     },
+     "execution_count": 21,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
   "source": [
    "# Store all of the data rows into cs220_data\n",
    "cs220_data = cs220_csv[1:]\n",
@@ -178,7 +431,7 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 22,
   "metadata": {},
   "outputs": [],
   "source": [
@@ -187,11 +440,11 @@
  },
  {
   "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 23,
   "metadata": {},
   "outputs": [],
   "source": [
-    "# show the entire 1st row of data\n"
+    "# show the entire 1st row of actual data\n"
   ]
  },
  {
@@ -200,7 +453,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "# Find the sleeping habit for the 2nd student...by hardcoding its row and column....\n"
+    "# Find the pizza topping for the 2nd student...by hardcoding its row and column....\n"
   ]
  },
  {
@@ -209,7 +462,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "# Find the lecture number of the 4th student...by hardcoding its row and column....\n"
+    "# Find the lat-long of the 4th student...by hardcoding its row and column....\n"
   ]
  },
  {
@@ -225,12 +478,12 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "# Print out every student's sleep habits and major\n",
+    "# Print out every student's sleep habit and pets\n",
    "# use for \n",
    "for row in cs220_data:\n",
    "    current_sleep_habit = None\n",
-    "    current_major = None\n",
+    "    pets = None\n",
-    "    print(current_sleep_habit + '\\t\\t' + current_major)"
+    "    print(current_sleep_habit + '\\t\\t' + pets)"
   ]
  },
  {
@@ -239,9 +492,9 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "# Create a list containing the average age of LEC003.\n",
+    "# Create a list containing the average years of people who do not live in Wisconsin\n",
+    "\n",
    "\n",
-    "lecture = \"LEC003\"\n",
    "\n",
    "for row in cs220_data:\n",
    "    pass"
@@ -252,7 +505,7 @@
   "metadata": {},
   "source": [
    "## It would be nice to have a helper function!\n",
-    "Let's introduce `cell`"
+    "A function that easily accesses a `cell`"
   ]
  },
  {
@@ -280,8 +533,7 @@
   "outputs": [],
   "source": [
    "# We want to invoke something like...\n",
-    "# cell(24, \"Pet owner\")\n",
+    "# cell(24, <colName>)\n",
-    "# cell(63, \"Zip Code\")\n",
    "def cell_v1(row_idx, col_name):\n",
    "    col_idx = ??? # get the index of col_name\n",
    "    val = ???     # get the value of cs220_data at the specified cell\n",
@@ -304,7 +556,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "# Redo sleep habits and major using the cell function"
+    "# Redo above probllem cell function"
   ]
  },
  {
@@ -313,7 +565,7 @@
   "metadata": {},
   "outputs": [],
   "source": [
-    "# redo average age using the cell function\n"
+    "# redo ....  using the cell function\n"
   ]
  },
  {
@@ -349,15 +601,6 @@
   "metadata": {},
   "source": []
  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Count how many people are both an Engineer and a pet owner."
-   ]
-  },
  {
   "cell_type": "code",
   "execution_count": null,
@@ -379,7 +622,7 @@
 ],
 "metadata": {
  "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
@@ -393,7 +636,7 @@
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
-   "version": "3.9.1"
+   "version": "3.9.12"
  }
 },
 "nbformat": 4,

 %% Cell type:code id: tags:
 ``` python
 # Warmup #1: Take a look at these list methods
 # https://www.w3schools.com/python/python_ref_list.asp
 dairy = ["milk", "ice cream", "cheese", "yogurt" ]
 #use the .index() method to get the index of "ice cream"
 ```
 %% Cell type:code id: tags:
 ``` python
 # Warmup #2:  Because a list is a sequence, we can use the 'in' operator
 food_shelf = ["peanut butter", "milk", "bread", "cheese", "YOGURT"]
 for item in food_shelf:
-    if ???:
+    if ... :
        print(item, "is dairy")
    else:
        print(item, "is not dairy")
 ```
-%% Cell type:code id: tags:
+%% Output
-``` python
-# Warmup #3: finish Monday's lecture problems
-```
-%% Cell type:code id: tags:
+    peanut butter is dairy
+    milk is dairy
-``` python
+    bread is dairy
-# Warmup #4: Open cs220_survey_data.csv from your Desktop
+    cheese is dairy
-# Take notes here
+    YOGURT is dairy
-# Look at the slides for today
-```
 %% Cell type:markdown id: tags:
-# CS220: Lecture 15
+# Lecture 15: CSV Files
 ## Learning Objectives
 After this lecture you will be able to...
 - Open an Excel file and export it to a Comma Separated Value file.
 - Open a CSV file in TextEditor/Jupyter and connect the elements of the CSV file to the rows and columns in the spreadsheet.
 - Use pre-written Python code to read a CSV file into a list of lists.
 - Write Python statements with double list indexing to access any element of a CSV file via a list of lists.
 - Write code that answers questions about CSV data by writing for loops on lists of lists.
 %% Cell type:code id: tags:
 ``` python
+# Open the file of student survey data in Jupyter
+# Then open it in Windows ... what program opened?
 ```
 %% Cell type:markdown id: tags:
 ### Open a CSV file in TextEditor/Jupyter and connect the elements of the CSV file to the rows and columns in the spreadsheet.
 %% Cell type:code id: tags:
 ``` python
 # What do you notice?  Take notes here
 #
 ```
 %% Cell type:markdown id: tags:
 ## Use pre-written Python code to read a CSV file into a list of lists.
 %% Cell type:code id: tags:
 ``` python
 ```
 %% Cell type:code id: tags:
 ``` python
-# copied from https://automatetheboringstuff.com/chapter14/
+# inspired by https://automatetheboringstuff.com/chapter14/
 import csv
 def process_csv(filename):
    # open the file, its a text file utf-8
    exampleFile = open(filename, encoding="utf-8")
    # prepare it for reading as a CSV object
    exampleReader = csv.reader(exampleFile)
    # use the built-in list function to convert this into a list of lists
    exampleData = list(exampleReader)
    # close the file to tidy up our workspace
    exampleFile.close()
    # return the list of lists
    return exampleData
 ```
 %% Cell type:code id: tags:
 ``` python
 # Call the process_csv function and store the list of lists in cs220_csv
-cs220_csv = process_csv('cs220_survey_data.csv')
+cs220_csv = process_csv('amfam_survey_data.csv')
-cs220_csv
+cs220_csv[:3]
 ```
+%% Output
+    [['pizza topping',
+      'state',
+      'years',
+      'sleep preference',
+      'month',
+      'pets',
+      'lat-long'],
+     ['mushroom',
+      'Florida',
+      '7',
+      'early bird',
+      'March',
+      '',
+      '30.263214888389417, -81.54792098150529'],
+     ['pineapple',
+      'Wisconsin',
+      '4',
+      'night owl',
+      'April',
+      'other',
+      '43.1581437, -89.2921125']]
 %% Cell type:code id: tags:
 ``` python
 # Store the header row into cs220_header
 cs220_header = cs220_csv[0]
 cs220_header
 ```
+%% Output
+    ['pizza topping',
+     'state',
+     'years',
+     'sleep preference',
+     'month',
+     'pets',
+     'lat-long']
 %% Cell type:code id: tags:
 ``` python
 # Store all of the data rows into cs220_data
 cs220_data = cs220_csv[1:]
 cs220_data
 ```
+%% Output
+    [['mushroom',
+      'Florida',
+      '7',
+      'early bird',
+      'March',
+      '',
+      '30.263214888389417, -81.54792098150529'],
+     ['pineapple',
+      'Wisconsin',
+      '4',
+      'night owl',
+      'April',
+      'other',
+      '43.1581437, -89.2921125'],
+     ['sausage',
+      'Wisconsin',
+      '10',
+      'early bird',
+      'July',
+      'other',
+      '43.15645, -89.28814'],
+     ['pepperoni',
+      'WI',
+      '7',
+      'no preference',
+      'September',
+      'dog,cat',
+      '43.073051, -89.401230'],
+     ['mushroom', 'madison', '7', 'early bird', 'November', '', ''],
+     ['pepperoni',
+      'FL',
+      '1',
+      'no preference',
+      'December',
+      'dog',
+      '42.35623761108948, -71.05691488946681'],
+     ['pepperoni',
+      'Wisconsin',
+      '2',
+      'night owl',
+      'February',
+      '',
+      '43.159045128642774, -89.29146323507756'],
+     ['mushroom',
+      'Florida',
+      '0.5',
+      'night owl',
+      'May',
+      'other',
+      '43.160601, -89.287671'],
+     ['mushroom',
+      'Wisconsin',
+      '10',
+      'no preference',
+      'January',
+      'dog,fish',
+      '43.1562216,-89.2880086'],
+     ['pineapple',
+      'Wisconsin',
+      '8',
+      'night owl',
+      'July',
+      'dog',
+      '43.158655, -89.289895'],
+     ['sausage',
+      'Minnesota',
+      '15',
+      'no preference',
+      'August',
+      'dog,cat',
+      '45.13881645889933, -93.47636590830673'],
+     ['pepperoni',
+      'New Jersey',
+      '1',
+      'night owl',
+      'May',
+      'other',
+      '43.07148896663423, -89.40567798752735'],
+     ['basil',
+      'Rhode Island',
+      '1',
+      'night owl',
+      'March',
+      'dog',
+      '43.156490793353775, -89.28796434617352'],
+     ['mushroom', 'TX', '1', 'no preference', 'January', 'dog', ''],
+     ['pineapple',
+      'Florida',
+      '3',
+      'early bird',
+      'July',
+      'other',
+      '27.979191147972834, -82.33356380365498'],
+     ['sausage',
+      'Wisconsin',
+      '0',
+      'early bird',
+      'December',
+      'dog,cat',
+      '43.15631441766965, -89.28785659081201'],
+     ['pineapple',
+      'Wisconsin',
+      '6',
+      'no preference',
+      'June',
+      'dog',
+      '43.157716440341964, -89.28939262164963'],
+     ['mushroom',
+      'Florida',
+      '7',
+      'no preference',
+      'July',
+      'other',
+      '30.053546, -81.514610'],
+     ['sausage',
+      'Florida',
+      '3',
+      'early bird',
+      'January',
+      'dog,fish',
+      '30.263357, -81.547884'],
+     ['mac&cheese',
+      'Wisconsin',
+      '5',
+      'night owl',
+      'July',
+      'dog',
+      '43.158328032172754, -89.28946714938327'],
+     ['pepperoni',
+      'Wisconsin',
+      '10',
+      'early bird',
+      'April',
+      'other',
+      '43.1884213,-89.2762121'],
+     ['other',
+      'Wisconsin',
+      '10',
+      'early bird',
+      'August',
+      'other',
+      '43.15833, -89.28988'],
+     ['sausage',
+      'WI',
+      '14',
+      'night owl',
+      'September',
+      'dog,cat',
+      '43.15733597381252, -89.29013010509833'],
+     ['sausage',
+      'Wisconsin',
+      '6',
+      'no preference',
+      'August',
+      'dog,cat',
+      '43.159061371631616, -89.29141118826759'],
+     ['pepperoni',
+      'Wisconsin',
+      '8',
+      'early bird',
+      'September',
+      'dog,cat,fish',
+      '43.158359 -89.289972'],
+     ['pineapple',
+      'Florida',
+      '8',
+      'night owl',
+      'October',
+      '',
+      '30.263432655702932, -81.54807118535949'],
+     ['pineapple',
+      'TX',
+      '4',
+      'night owl',
+      'October',
+      'dog',
+      '42.3558293029345, -71.05683171712127'],
+     ['other', 'WI', '2', 'early bird', 'June', '', ''],
+     ['mushroom',
+      'Wisconsin',
+      '20',
+      'early bird',
+      'September',
+      'dog',
+      '43.15826500058843, -89.28945716165009'],
+     ['sausage',
+      'Wisconsin',
+      '8',
+      'night owl',
+      'June',
+      'dog',
+      '43.15839022178169, -89.28998287477457'],
+     ['sausage',
+      'Wisconsin',
+      '20',
+      'night owl',
+      'April',
+      'bird',
+      '43.15648555750267, -89.28783647996661'],
+     ['pineapple', 'Texas', '0.5', 'early bird', 'August', 'other', '43, 89']]
 %% Cell type:markdown id: tags:
 ## CSVs as a List of Lists
 %% Cell type:code id: tags:
 ``` python
 # Determine how many students completed the survey.
 ```
 %% Cell type:code id: tags:
 ``` python
-# show the entire 1st row of data
+# show the entire 1st row of actual data
 ```
 %% Cell type:code id: tags:
 ``` python
-# Find the sleeping habit for the 2nd student...by hardcoding its row and column....
+# Find the pizza topping for the 2nd student...by hardcoding its row and column....
 ```
 %% Cell type:code id: tags:
 ``` python
-# Find the lecture number of the 4th student...by hardcoding its row and column....
+# Find the lat-long of the 4th student...by hardcoding its row and column....
 ```
 %% Cell type:code id: tags:
 ``` python
 ```
 %% Cell type:code id: tags:
 ``` python
-# Print out every student's sleep habits and major
+# Print out every student's sleep habit and pets
 # use for
 for row in cs220_data:
    current_sleep_habit = None
-    current_major = None
+    pets = None
-    print(current_sleep_habit + '\t\t' + current_major)
+    print(current_sleep_habit + '\t\t' + pets)
 ```
 %% Cell type:code id: tags:
 ``` python
-# Create a list containing the average age of LEC003.
+# Create a list containing the average years of people who do not live in Wisconsin
-lecture = "LEC003"
 for row in cs220_data:
    pass
 ```
 %% Cell type:markdown id: tags:
 ## It would be nice to have a helper function!
-Let's introduce `cell`
+A function that easily accesses a `cell`
 %% Cell type:code id: tags:
 ``` python
 # How do we get the names of all the columns?
 ```
 %% Cell type:code id: tags:
 ``` python
 # Get the column index of "Pizza topping"
 ```
 %% Cell type:code id: tags:
 ``` python
 # We want to invoke something like...
-# cell(24, "Pet owner")
+# cell(24, <colName>)
-# cell(63, "Zip Code")
 def cell_v1(row_idx, col_name):
    col_idx = ??? # get the index of col_name
    val = ???     # get the value of cs220_data at the specified cell
    return val
 ```
 %% Cell type:code id: tags:
 ``` python
 # Print out the lecture number of the 4th student... using the cell function
 cell_v1(???, ???)
 ```
 %% Cell type:code id: tags:
 ``` python
-# Redo sleep habits and major using the cell function
+# Redo above probllem cell function
 ```
 %% Cell type:code id: tags:
 ``` python
-# redo average age using the cell function
+# redo ....  using the cell function
 ```
 %% Cell type:code id: tags:
 ``` python
 # Improve the cell function so it returns the appropriate type.
 # If there is nothing in the cell, return None
 # otherwise, use the col_name to convert to the expected type
 def cell(row_idx, col_name):
 ```
 %% Cell type:code id: tags:
 ``` python
 # # redo again using the improved cell function
 ```
 %% Cell type:markdown id: tags:
 ## Practice problems
 %% Cell type:markdown id: tags:
 %% Cell type:code id: tags:
 ``` python
-# Count how many people are both an Engineer and a pet owner.
-```
-%% Cell type:code id: tags:
-``` python
 # What percentage of students chose a non-meat pizza topping?
 ```
 %% Cell type:code id: tags:
 ``` python
 # What do you want to find out ?
 ```

--- a/f22/andy_lec_notes/lec_15/readme.md
+++ b/f22/andy_lec_notes/lec_15/readme.md
--- a/f22/andy_lec_notes/lec_15/cs220_survey_data.csv
+++ b/f22/andy_lec_notes/lec_15/cs220_survey_data.csv
--- a/f22/andy_lec_notes/lec_15/lec15_csvfiles_850.ipynb
+++ b/f22/andy_lec_notes/lec_15/lec15_csvfiles_850.ipynb
--- a/f22/andy_lec_notes/lec_15/lec15_csvfiles_amfam.ipynb
+++ b/f22/andy_lec_notes/lec_15/lec15_csvfiles_amfam.ipynb