I’m working on a university timetable project using Python and Tkinter. My code runs without errors, but I’m facing an issue. When I input the Excel CSV file path and click to read and display, nothing appears in the courses or filtered courses listboxes. I’m not sure what’s causing this problem.
Here’s a simplified version of my code:
import tkinter as tk
import csv
class TimetableApp:
def __init__(self, root):
self.root = root
self.root.title('Course Scheduler')
self.courses = []
self.file_entry = tk.Entry(root)
self.file_entry.pack()
tk.Button(root, text='Load Courses', command=self.load_courses).pack()
self.course_list = tk.Listbox(root)
self.course_list.pack()
def load_courses(self):
path = self.file_entry.get()
with open(path, 'r') as file:
reader = csv.reader(file)
self.courses = list(reader)
self.update_course_list()
def update_course_list(self):
self.course_list.delete(0, tk.END)
for course in self.courses:
self.course_list.insert(tk.END, course[0])
app = TimetableApp(tk.Tk())
app.root.mainloop()
I’ve tried debugging the load_courses function, but it doesn’t seem to be the issue. Any ideas on how to fix this?
Hey there CreativeChef15! 
I totally get your frustration with the listbox not showing anything. Been there, done that! 
Have you double-checked that your CSV file is in the right format and the path is correct? Sometimes it’s the little things that trip us up.
Also, I’m curious - what does your CSV file look like? Are you sure the course name is in the first column (index 0)? If it’s in a different column, you might need to adjust your code a bit.
Oh, and here’s a thought - maybe try adding some print statements in your load_courses and update_course_list functions? That way you can see if the data is being read correctly and if the update function is actually being called.
Let me know if any of this helps or if you need more ideas. We’ll figure this out together! 
hey creativechef15, have u tried printin the courses list after readin the csv? might help u see if its actually loadin data. also, check if ur file path is correct - sometimes that can trip things up. oh, and make sure ur csv has the right structure. good luck mate, let us know how it goes!
I’ve encountered similar issues with Tkinter listboxes before. One potential problem could be that the mainloop is blocking the GUI updates. Try adding self.root.update() after inserting items into the listbox in your update_course_list method.
Another possibility is that the CSV file might be empty or not in the expected format. You could add error handling to check if self.courses is empty after reading the file.
Additionally, ensure your CSV file path is absolute, not relative. Relative paths can sometimes cause issues depending on how you’re running the script.
Lastly, consider using a more robust CSV parsing library like pandas if you’re dealing with complex data structures. It can handle various CSV formats more reliably than the built-in csv module.