Displaying data in Treeview after using filedialog to browse and upload file in Tkinter

Displaying data in Treeview by using Tkinter filedialog to show file browser to upload & read file

We will use one Treeview to display the data of the Filedialog uploaded file ( after reading ) inside the same window.
Display data of uploaded file

import tkinter as tk
from tkinter import ttk,filedialog
from tkinter.filedialog import askopenfile
my_w = tk.Tk()
my_w.geometry("400x300")  # Size of the window 
my_w.title('www.plus2net.com')
my_font1=('times', 18, 'bold')
l1 = tk.Label(my_w,text='Upload File & read',width=30,font=my_font1)  
l1.grid(row=1,column=1)
b1 = tk.Button(my_w, text='Upload File', 
   width=20,command = lambda:upload_file())
b1.grid(row=2,column=1) 
trv=ttk.Treeview(my_w,selectmode='browse')
trv.grid(row=3,column=1,columnspan=4,padx=20,pady=20)
trv['show'] = 'tree'
def upload_file():
    file = filedialog.askopenfilename(
        filetypes=[("CSV files", ".csv")])
    if file:        
        fob=open(file,'r')    
        i=0
        for data in fob:
            trv.insert("",'end',iid=i,text=data)
            i=i+1
    else:
        print("No file chosen")
my_w.mainloop()  # Keep the window open

When user cancels the file window

After opening the file browser the user may use the cancel button to close the operation, to handle this we have added the if file: in above code. The else part of the code will display the message.

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Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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Tkinter filedialog to display Treeview

When user cancels the file window

Subhendu Mohapatra