Grading script for CSCI 201 HW #2

helper.py

from sys import argv
from subprocess import run
import datetime
import re
origin = None
index = 0

easy=[
	0,
	1.2,
	3,
	4,
	5.2,
	8,
	9.6,
	10,
	13.4,
	16,
	16.6,
	18,
	22.6,
	24.4,
	24.4,
	30.8
]

sametime=[
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    1.2,
    1.2,
    5.4,
    6.4,
    6.4,
    6.6,
    6.6,
    6.6,
    12.8
]

hard=[
    0,
    1,
    1.2,
    2,
    3,
    3.2,
    4,
    5,
    6,
    7.6,
    8.4,
    10.6,
    11.6,
    12.4,
    60,
    66.4
]

# User input in the form of a command line argument
# determines which array should be used
offset = None
if argv[1] == 'easy':
    offset = easy
elif argv[1] == 'hard':
    offset = hard
elif argv[1] == 'sametime':
    offset = sametime
else:
    raise Exception("invalid test case")

# Compile a regular expression pattern to capture the timestamps
pattern = re.compile(r'([0-9:]+)')

# Take the contents of the clipboard, save it into "log"
# Note to CPs, this is where input is (currently) being
# captured from, copy student timestamp log data to your clipboard
program = run(args=['pbpaste'], capture_output=True)
log = program.stdout.decode().split('\n')

# Parse through each line with a timestamp from the student's output file
for line in log:
    # Skip blank lines
    if len(line.strip()) == 0:
        continue
		
    # Get the current line from stdin
    match = pattern.search(line)
	
    # Convert it into a timestamp
    t = match.group(1).split(':')
    logged_time = datetime.datetime(2020, 3, 29, int(t[0]), int(t[1]), int(t[2]))
    delta = datetime.timedelta(milliseconds=int(offset[index]*1000))
	
    # Set the start-time if currently unset
    if origin == None:
        origin = logged_time
    correct_time = origin + delta
    threshold = datetime.timedelta(seconds=1)

    if not (correct_time - threshold < logged_time < correct_time + threshold):
        print('---')
        print(f'index: {index}')
        print(f"Deduction: logged_time is {logged_time}")
        print(f"     logged_time should be{correct_time}")
        print('---')
    # Increment the index