i have this code that reads from a file - the file finds the values under "Course No." and prints them

import sys

def find_courses(filename):

course_num = []

course_section = []

with open(filename, 'r', encoding='latin-1') as file:

for line in file:

cols = line.split()

if len(cols) > 1 and cols[0].isalnum() and len(cols[0]) >= 5:

if len(cols[0]) >= 1 and cols[0][:11].isalnum():

course_num.append(cols[0])

section = cols[1]

if section.isdigit():

course_section.append(section)

all_courses = len(course_num)

all_course_sections = len(course_section)

print(f'{all_courses} {sorted(set(course_num))}')

print(f'{all_course_sections} {course_section}')

if __name__ == "__main__":

filename = sys.argv[1]

find_courses("/work/FA-2020-DAY.txt")

this is a sample of the file- Course No. Sec Course Title Hrs Faculty Mtg Time Days Bld Room Cap Max Reg ACTIVE TECHNOLOGIES ***PREREQ:CSC160

for some reason, the code prints "Active" however, "Active" is not a value under "Course No." Knowing that "Course No." is at index 0 but "Active" is not at index 0. how to fix the problem and prevent it from printing Active?