f23/Cole_Lecture_Notes/12_Iteration_Practice/Lec_12_Iteration_Practice_Template_Nelson.ipynb

+%% Cell type:code id: tags:
+
+``` python
+# Warmup 1: Jupyter Notebook stuck in [*]?
+#           Press the stop button! It's probably waiting for input.
+#           Otherwise, restart the kernal! (and run the cells)
+
+x = int(input("Type in a number: "))
+print("The number is " + str(x), x + 1, x + 2, x + 3, x + 4, sep=" then ", end="!\n")
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Warmup 2: Write a function that prints the factorial of parameter num
+def do_factorial(num):
+    pass
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Warmup 3: Complete the code to print a treasure map where an X is placed
+#           treasure_row, treasure_col (starting from 0)
+def print_treasure_map(symbol='-', height=4, width=4, treasure_row=2, treasure_col=2):
+    i = 0
+    while ???: # TODO: Complete the loop condition for printing out each row.
+        j = 0
+        while j < width:
+            if ???: # TODO: Complete the if condition for checking if we print an X or the symbol.
+                print('X', end="")
+            else:
+                print(symbol, end="")
+            j += ??? # TODO: Complete the statement so we do not run into an infinite loop.
+        print()
+        i += 1
+
+print_treasure_map()
+print_treasure_map(width=10, height=10)
+print_treasure_map('#', 7, 4, treasure_row=0, treasure_col=1)
+print_treasure_map('.', 5, 8, 3, 6)
+```
+
+%% Cell type:markdown id: tags:
+
+# CS220: Lecture 12
+
+
+## Learning Objectives
+After this lecture you will be able to...
+- Iterate through a dataset using for idx in range(project.count())
+- Compute the frequency of data that meets a certain criteria
+- Find the maximum or minimum value of a numeric column in a dataset
+- Use break and continue in for loops when processing a dataset
+- Handle missing numeric values when computing a maximum/minimum
+- Use the index of a maximum or minimum to access other information about that data item
+
+%% Cell type:code id: tags:
+
+``` python
+import project
+```
+
+%% Cell type:code id: tags:
+
+``` python
+help(project)
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Get the total # of responses
+project.count()
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Get the first student's primary major.
+# With indices, we always start from 0!
+project.get_primary_major(0)
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Example 1: Print and Break
+for i in range(project.count()):
+    print (i, project.get_primary_major(i))
+    if i == 10:
+        break
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# TODO: Write the same code as above using a while loop!
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Example 2: How many students are not in Computer Science?
+non_cs = 0
+for i in range(project.count()):
+    major = project.get_primary_major(i)
+    if major == "Computer Science":
+        continue
+    non_cs += 1
+print(non_cs, "out of", project.count(), "are non-cs!")
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# TODO:   How many students are in Data Science or Statistics?
+# BONUS:  Can you express this as a percentage?
+# BONUS+: ...rounded to 2 decimal places?
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# max = 0 # don't use built-in function names as variables
+max_age = 0
+for i in range(project.count()):
+    student_age = project.get_age(i)
+    if student_age > max_age:
+            max_age = student_age
+print("The oldest student is", max_age)
+
+# HINT: Did everyone fill out an age?
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# TODO: What is the age of the youngest student?
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Example 5: How many early birds are there below the age of 21?
+
+early_birds = 0
+for i in range(project.count()):
+    sleep_habit = project.get_sleep_habit(i)
+    age = project.get_age(i)
+    if age != "":
+        age = int(age)
+        if ???: # TODO Complete this condition!
+            early_birds += 1
+
+print("There are", early_birds, "early birds below the age of 21.")
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# TODO:   What percentage of 20-year-olds are early birds?
+# BOUNUS: How can we generalize our code to 'What percentage of x-year-olds are early birds?'
+```
+
+%% Cell type:code id: tags:
+
+``` python
+# Other tasks for you to try...
+#  - What is the average age of the class?
+#  - What is the class's favorite pizza topping?
+#  - What is the most popular major?
+#  - For all students that have another major, print out what it is.
+#  - What zip code do the majority of pineapple-eating night owls live in?
+```

f23/Cole_Lecture_Notes/12_Iteration_Practice/project.py

+__student__ = []
+
+
+def __init__():
+    import csv
+    """This function will read in the csv_file and store it in a list of dictionaries"""
+    __student__.clear()
+    with open('cs220_survey_data.csv', mode='r', encoding='utf-8') as csv_file:
+        csv_reader = csv.DictReader(csv_file)
+        for row in csv_reader:
+            __student__.append(row)
+
+def count():
+    """This function will return the number of records in the dataset"""
+    return len(__student__)
+
+
+def get_lecture(idx):
+    """get_lecture(idx) returns the lecture of the student in row idx"""
+    return __student__[int(idx)]['Lecture']
+
+
+def get_section(idx):
+    """get_lecture(idx) returns the section of the student in row idx"""
+    return __student__[int(idx)]['section']
+
+
+def get_age(idx):
+    """get_age(idx) returns the age of the student in row idx"""
+    return __student__[int(idx)]['Age']
+
+
+def get_primary_major(idx):
+    """get_primary_major(idx) returns the primary major of the student in row idx"""
+    return __student__[int(idx)]['Primary major']
+
+
+def get_other_majors(idx):
+    """get_other_majors(idx) returns the secondary major of the student in row idx"""
+    return __student__[int(idx)]['Other majors']
+
+
+def get_zip_code(idx):
+    """get_zip_code(idx) returns the residential zip code of the student in row idx"""
+    return __student__[int(idx)]['Zip Code']
+
+
+def get_pizza_topping(idx):
+    """get_pizza_topping(idx) returns the preferred pizza toppings of the student in row idx"""
+    return __student__[int(idx)]['Pizza topping']
+
+def get_cats_or_dogs(idx):
+    """get_cats_or_dogs(idx) returns whether student in row idx likes cats or dogs"""
+    return __student__[int(idx)]['Cats or dogs']
+
+def get_runner(idx):
+    """get_runner(idx) returns whether student in row idx is a runner"""
+    return __student__[int(idx)]['Runner']
+
+def get_sleep_habit(idx):
+    """get_sleep_habit(idx) returns the sleep habit of the student in row idx"""
+    return __student__[int(idx)]['Sleep habit']
+
+def get_procrastinator(idx):
+    """get_procrastinator(idx) returns whether student in row idx is a procrastinator"""
+    return __student__[int(idx)]['Procrastinator']
+
+
+def get_song(idx):
+    """get_procrastinator(idx) returns the student in row idx favorite song"""
+    return __student__[int(idx)]['Song']
+
+
+__init__()