Classwork 2

Python Fundamentals

Question 1

(a)

Using Python operations only, calculate below: \[\frac{2^5}{7 \cdot (4 - 2^3)}\]

(b)

Given:

data = [10, 2.5, "3"]

Using Python only, calculate 10 + 2.5 + 3

(c)

Given:

exam_score = {"Midterm": 78, "Final": 92}

Compute the Total Exam Score:

\[ \begin{align} \text{(Total Exam Score)} = \max\{ &0.50\times \text{(Midterm)} + 0.50\times \text{(Final)},\\ &0.33\times \text{(Midterm)} + 0.67\times \text{(Final)} \} \end{align} \]

Question 2

For each expression below, what is the value of the expression? Explain thoroughly.

(a)

20 == '20'

(b)

x = 4.0
y = .5

x < y or 3*y < x

Question 3

(a)

What will the following code print? (Answer without running it.)

status = "Gold"
cart_total = 92.5

free_shipping_levels = ["Gold", "Platinum"]

if status in free_shipping_levels:
    shipping = 0
    msg = f"Status: {status} → Free shipping! Total = ${cart_total}"
elif cart_total >= 100:
    shipping = 0
    msg = f"Spend threshold met → Free shipping! Total = ${cart_total}"
else:
    shipping = 7.99
    msg = f"Status: {status}, Total = ${cart_total} → Shipping = ${shipping}"

print(msg)

(b)

• Fill in the blanks:
  • If name is "Geneseo" and score >= 90 → print "Geneseo high score"
  • Else if score >= 90 → print "High score"
  • Else → print "Try again"

name = "Geneseo"
score = 88

# Fill in the blanks
if ______________________________:
    print("Geneseo high score")
elif ____________________________:
    print("High score")
else:
    print("Try again")

Question 4

(a)

What will the following code print? (Do not run it—reason it out.)

nums = [10, 20, 30, 40, 50, 60, 70]

print(nums[2:6])
print(nums[:4])
print(nums[::2])
print(nums[-4:-1])

(b)

fare = "$10.00"
tip = "2.00$"
tax = "$ 0.80"

Write a Python code that uses slicing and the print() function to print out the following message:

The total trip cost is: $12.80

Question 5

list_variable = [100, 144, 169, 1000, 8]

Write a Python code that uses print() and max() functions to print out the largest value in the list, list_variable, as follows:

The largest value in the list is: 1000

Question 6

vals = [3, 2, 1, 0]

• Use a while loop to print each value of the list [3, 2, 1, 0], one at a time.
• Use a for loop to print each value of the list [3, 2, 1, 0], one at a time.

Question 7

• Assign the value 7 to the variable guess_me, and the value 1 to the variable number.

• Write a while loop that compares number with guess_me.

  • Print ‘too low’ if number is less than guess me.
  • If number equals guess_me, print ‘found it!’ and then exit the loop.
  • If number is greater than guess_me, print ‘oops’ and then exit the loop.
  • Increment number at the end of the loop.

• Write a for loop that compares number with guess_me.

  • Print ‘too low’ if number is less than guess me.
  • If number equals guess_me, print ‘found it!’ and then exit the loop.
  • If number is greater than guess_me, print ‘oops’ and then exit the loop.
  • Increment number at the end of the loop.

Question 8

• You are given a variable value that contains a string.

value = "$320"

• Write a Python program to:
  1. Attempt to convert value to a floating-point number using float().
  2. If the conversion is successful, print: “You entered: ”.
  3. If the conversion fails (e.g., the value is not a valid number), print: “That’s not a valid number!”.
• Use a try-except block to handle the potential error.

Question 9

• Import the pandas library as pd.
• Install the selenium library.
• From selenium, import the functions webdriver.

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