Question 1

1. Create a function named feet_to_inches(ft)
2. 1.1 Add assert to check 'ft' is an int with error message = 'feet is not an integer'
3. 1.2 Convert 'ft' to 'inches'
4. 1.3 Return the value of 'inches'
5. Call feet_to_inches(ft) with ft = 10
6. Call feet_to_inches(ft) with ft = 5
7. Call feet_to_inches(ft) with ft = 0
8. Call feet_to_inches(ft) with ft = 'ten'

In [ ]:

def feet_to_inches(ft)

Question 2

1. Use the function named avg_grades(grades) provided
2. 1.1 Add assert to check 'grade' is greater than or equal to 0 with error message = 'invalid grade - must be greater than or equal to 0'
3. Define grades = [80, 0, 90, 100, 70]
4. Print the result of avg_grades(grades)

In [ ]:

def avg_grades(grades):

total = 0

for grade in grades:

# INSERT YOUR ASSERT STATEMENT HERE

total += grade

return total / len(grades)

# INSERT YOUR CODE HERE

Python Testing using unittest

IMPORTANT: To Run unittest in Jupyter Notebook you have to modify unittest.main()

See https://medium.com/@vladbezden/using-python-unittest-in-ipython-or-jupyter-732448724e31

Question 3

1. Use the function named lbs_to_stones (code provided)
2. Use unittest to test this funtion (requires 'import' statement)
3. Define a class Tests(unittest.TestCase)
4. Define a test method named 'test_lbs_to_stones(self)'
5. Use assertEqual to verify lbs_to_stones(140) is equal to 10
6. Add if name == 'main' ... lines (see IMPORTANT note below for syntax)

# IMPORTANT: To run unittest in Jupyter you must make this change:

# if __name__ == '__main__':

# unittest.main()

#

# ... TO ...

# if __name__ == '__main__':

# unittest.main(argv=['first-arg-is-ignored'], exit=False)

#

"""

Function that need to be unit tested

"""

def lbs_to_stones(lbs):

return lbs/14

# INSERT YOUR CODE HERE

Python Debugging with Print()

Using simple print() commands is often all that's needed when debugging a problem

Question 4

Using print() statements, determine the location of the problem in this function

1. Insert at least 1 print("DEBUG: ...") statement in the code provided for debugging purposes
2. Use the information provided to debug and correct the code.

NOTE: LEAVE THE PRINT STATEMENTS IN THE CODE EVEN AFTER YOU CORRECT THE CODE

You must include the text string "DEBUG:" in your debugging print statements

Answers should be:

• student1: 89.60
• student2: 90.00
• student3: 76.60
• Class average: 85.40

# INSERT PRINT() STATEMENTS IN THE CODE BELOW

"""

Purpose:

1. Calculate the average grade for each student

2. Calculate the avgeage grade for the class (3 students)

"""

student_grades = {

"student1": [80, 82, 91, 95, 100],

"student2": [85, 85, 95, 95, 90],

"student3": [75, 68, 82, 78, 80] }

student_count = 0

student_total = 0

student_avg = 0

class_total = 0

class_avg = 0

for student, grades in student_grades.items():

for grade in grades:

student_total += grade

# Calculate student average

student_avg = student_total / len(grades)

# Display each student's name and average

print(f'{student}: {student_avg:.2f}')

student_count += 1

# Add student total to class total

class_total += student_total

# Calculate class average

class_avg = class_total / student_count

# Display class average

print(f'Class average: {class_avg:.2f}')

---------------------------------------------------------------------------------------------------------------------------

student1: 89.60

student2: 179.60

student3: 256.20

Class average: 427.00

Question 5

Describe at least 2 problems you found & fixed in the code provided in Question 4 (above)

Python Debugging with Logging

Logging can be used to trace the flow of your code and to flag events using different severity levels:

• logging.info()
• logging.debug()
• logging.warning()
• logging.error()
• logging.exception()
• logging.critical()

Question 6

Try some simple logging to the console

1. Create a DEBUG logger message: 'This is a DEBUG message. Is this the code bug?'
2. Create an INFO logger message: 'This is an INFO message. This is CSC 221 Lab2.'
3. Create a WARNING logger message: 'This is a WARNING message. Be careful.'
4. Create an ERROR logger message: 'This is an ERROR message. Houston - we have a PROBLEM!'
5. Create a CRITICAL logger message: 'This is a CRITICAL message. OMG - Hit the brakes!!!'

REFERENCE: https://docs.python.org/3/howto/logging.html

Generate a variety of logging messages

"""

import logging

logger = logging.getLogger('Lab2_ConsoleLog')

logger.setLevel(logging.ERROR)

# INSERT YOUR CODE HERE

Question 7

Why do we only see the ERROR & CRITICAL logging messages in Question 6?

Question 8

Try some simple logging to the console and a file

Use the sample code provided at the REFERENCE URL provided as a guide

1. Set the logging level to logging.WARNING
2. Set the filename to 'CSC221Lab2.log'
3. Set LOGGER_NAME to 'Lab2_FileLogger'
4. Create a DEBUG logger message: 'This is a DEBUG message. Is this the code bug?'
5. Create an INFO logger message: 'This is an INFO message. This is CSC 221 Lab2.'
6. Create a WARNING logger message: 'This is a WARNING message. Be careful.'
7. Create an ERROR logger message: 'This is an ERROR message. Houston - we have a PROBLEM!'
8. Create a CRITICAL logger message: 'This is a CRITICAL message. OMG - Hit the brakes!!!'

REFERENCE: https://gist.github.com/wassname/d17325f36c36fa663dd7de3c09a55e74

Generate a variety of logging messages to the console and a log file

"""

import logging

import sys

# INSERT YOUR CODE HERE

Question 9

How many of the message levels go to the console & file in Question 8?

Which message levels are displayed?