ValueError: Python でアンパックするのに十分な値がありません

try:
    a, b, c = 3, 5
except ValueError as error:
    print("ValueError:", error)

ValueError: not enough values to unpack (expected 3, got 2)

import sys
from io import StringIO

# Simulate typing "2,2,2" at the prompt.
sys.stdin = StringIO("2,2,2\n")

x, y, z = input("Enter three numbers to multiply: ").split(",")
product = int(x) * int(y) * int(z)
print("The product of x, y, and z is:", product)

Enter three numbers to multiply: The product of x, y, and z is: 8

import sys
from io import StringIO

# Simulate typing "1,2" at the prompt.
sys.stdin = StringIO("1,2\n")

try:
    x, y, z = input("Enter values for x, y and z: ").split(",")
except ValueError as error:
    print("ValueError:", error)

Enter values for x, y and z: ValueError: not enough values to unpack (expected 3, got 2)

student = {"name": "Zeeshan Afridi", "degree": "BSSE", "section": "A"}

print("Keys:", student.keys())
print("Values:", student.values())
print("Items:", student.items())

Keys: dict_keys(['name', 'degree', 'section'])
Values: dict_values(['Zeeshan Afridi', 'BSSE', 'A'])
Items: dict_items([('name', 'Zeeshan Afridi'), ('degree', 'BSSE'), ('section', 'A')])

student = {"name": "Zeeshan Afridi", "degree": "BSSE", "section": "A"}

try:
    for k, v, l in student.items():
        print(k, v, l)
except ValueError as error:
    print("ValueError:", error)

ValueError: not enough values to unpack (expected 3, got 2)

student = {"name": "Zeeshan Afridi", "degree": "BSSE", "section": "A"}

for key, value in student.items():
    print("Key:", key)
    print("Value:", value)

Key: name
Value: Zeeshan Afridi
Key: degree
Value: BSSE
Key: section
Value: A

import sys
from io import StringIO

# Simulate typing "1,2" at the prompt.
sys.stdin = StringIO("1,2\n")

parts = input("Enter three numbers to multiply: ").split(",")

if len(parts) != 3:
    print("Please enter exactly three numbers separated by commas.")
else:
    x, y, z = (int(part) for part in parts)
    print("The product of x, y, and z is:", x * y * z)

Enter three numbers to multiply: Please enter exactly three numbers separated by commas.

import sys
from io import StringIO

# Simulate typing "2,two,4" at the prompt.
sys.stdin = StringIO("2,two,4\n")

try:
    x, y, z = input("Enter three numbers to multiply: ").split(",")
    product = int(x) * int(y) * int(z)
    print("The product of x, y, and z is:", product)
except ValueError as error:
    print("Could not use that input:", error)

Enter three numbers to multiply: Could not use that input: invalid literal for int() with base 10: 'two'