Rewrite your program from Unit $5$ so that it reads strings from the file and builds the list courses instead of defining all the data as part of your program itself.

The file aspect should be the only thing that you change $-$ the rest of the program logic should remain the same.

Note that when reading from a file, each line contains a newline character, $$

$,$ which will cause your table to be double spaced. See the string method $.$strip$()$ in Chapter $9\mathrm{.}5$ for an easy way of fixing this.

Add your test cases from the program in Unit $5$ at the end of the text file.

You can edit the text file with Notepad, or IDLE, or Thonny or any text editor on your system.

#Nikolaus Albers $9/14/2024$

#note: this one confused me a bit but I think I got it

def parse$\_$course$($course$\_$str$)$:

# Department code and course number are always $5$ characters combined $($e$.$g$.,$ CS$152)$

dept$\_$code $=$ course$\_$str$[$:$2]$ # First two characters are department letters

course$\_$num $=$ course$\_$str$[2$:$5]$ # Next three characters are course number

# Remaining string contains title and enrollment

# We find where the enrollment starts by detecting where numbers start appearing at the end

rest $=$ course$\_$str$[5$:$]$

i $=$ len$($rest$)-1$

# Move backward in the string to find where non$-$numeric characters end

while i $>=0$ and rest$[$i$].$isdigit$()$:

i $-=1$

# Title goes until the last non$-$digit character

title $=$ rest$[$:i $+1].$strip$()$

# Enrollment is the remaining part

enrollment $=$ int$($rest$[$i $+1$:$])$

return $($dept$\_$code, course$\_$num, title, enrollment$)$

def table$1($courses$)$:

print$("$Table $1")$

for course in courses:

dept$\_$code, course$\_$num, title, enrollment $=$ parse$\_$course$($course$)$

print$($f$"\{$dept$\_$code$\}\{$course$\_$num$\}")$

def table$2($courses$)$:

print$("$

Table $2")$

for course in courses:

dept$\_$code, course$\_$num, title, enrollment $=$ parse$\_$course$($course$)$

print$($f$"\{$dept$\_$code$\}\{$course$\_$num$\}\{$title$\}\{$enrollment$\}")$

def table$3($courses$)$:

print$("$

Table $3")$

total$\_$enrollment $=0$

for course in courses:

dept$\_$code, course$\_$num, title, enrollment $=$ parse$\_$course$($course$)$

# Truncate title to $20$ characters if longer

truncated$\_$title $=($title$[$:$20]+\text{'}...\text{'})$ if len$($title$)>20$ else title

print$($f$"\{$dept$\_$code$\}\{$course$\_$num$\}\{$truncated$\_$title:$<23\}\{$enrollment:$>3\}")$

total$\_$enrollment $+=$ enrollment

print$($f$"$Total: $\{$total$\_$enrollment$\}")$

def table$4($courses$)$:

print$("$

Table $4")$

# Sort courses by department and course number

courses$\_$sorted $=$ sorted$($courses$,$ key$=$lambda x: $($x$[$:$2],$ x$[2$:$5]))$

# Determine the length of the longest title

max$\_$title$\_$length $=$ max$($len$($parse$\_$course$($course$)[2])$ for course in courses$)$

for course in courses$\_$sorted:

dept$\_$code, course$\_$num, title, enrollment $=$ parse$\_$course$($course$)$

print$($f$"\{$dept$\_$code$\}\{$course$\_$num$\}\{$title:$<\{$max$\_$title$\_$length$\}\}\{$enrollment$\}")$

# Main function to execute tables

def main$()$:

courses $=[$

$\text{'}$CS$152$Introduction to Python Programming$21\text{'},\text{'}$CS$369$Operating Systems Administration$8\text{'},$

$\text{'}$CS$352$Data Structures$19\text{'},\text{'}$CS$208$Discrete Mathematics$124\text{'},\text{'}$CS$319$Computer Architecture$14\text{'},$

$\text{'}$MA$221$Calculus and Analytical Geometry for Majors I$12\text{'},\text{'}$MA$311$Linear Algebra$7\text{'},$

$\text{'}$MA$150$Precalculus Mathematics$27\text{'},\text{'}$CS$335$Introduction to Cybersecurity$20\text{'},$

$\text{'}$IS$361$Data Management Systems$22\text{'},\text{'}$MG$315$Advanced Business Statistics$6\text{'},$

$\text{'}$PH$100$Physics for Poets$5\text{'}$ # Additional record to test

$]$

table$1($courses$)$

table$2($courses$)$

table$3($courses$)$

table$4($courses$)$

# Run the main function to see all the tables

main$()$