How to make border for my table using python tkinter? - python-3.x

Question

Apparently, my application can display the excel file but it is a bit messy without border for the table.
import pandas as pd
import xlrd
import tkinter as tk
from tkinter import*
from tkinter import ttk, filedialog
root = tk.Tk()
root.title("My Application")
width = 1000
height = 500
def browseFile():
global workbook, copyWorkbook, excel_file, sheetName, worksheet, df_table
fileName = filedialog.askopenfilename(initialdir = '/', title = 'New File', filetypes = (('excel file', '.xlsx'), ('excel file', '.xls'), ('all files', '*.*')))
excel_file = pd.ExcelFile(fileName)
workbook = xlrd.open_workbook(fileName)
sheetCount = workbook.nsheets
sheetName = []
tab = []
for x in range(workbook.nsheets):
tab.append(ttk.Frame(tabControl))
sheetName = workbook.sheet_names()
tabControl.add(tab[x], text = sheetName[x])
df_table = excel_file.parse(sheetName[x])
lblTable = Label(tab[x], text = df_table.to_string(index = False)).pack()
toolbar = Frame(root)
btnOpen = Button(toolbar, text = "Open", command = browseFile).pack(side = LEFT)
btnQuit = Button(toolbar, text = "Quit", command = root.quit).pack(side = RIGHT)
toolbar.pack(side = TOP, fill = X)
tabControl = ttk.Notebook(root)
tabHome = ttk.Frame(tabControl)
tabControl.pack(expand = 1, fill = 'both', side = LEFT)
root.mainloop()
I have tried search statements that can display the table with border, but no result found. How can I add border to the table? Is it possible to add border? If not, what other method that I can use?

Answer 1

The problem
Your problem here is that, your code puts the entire dataframe into a single Label widget. When I tried putting a border around this label, it appeared around the whole dataframe, rather than around each cell.
My solution
My solution to this is to go through all of the rows and create an individual Label widget for each cell, giving each of these its own border. I then organised them using .grid() rather than .pack(). For the border, I used the settings borderwidth=2, relief="ridge", but you can choose others.
I also added a feature that sets the width of each column to its longest value to prevent the label's contents overflowing.
I did not include anything to include row and column headers, but you replacing i.pop(0) with i[0] and changing header=none should add this feature.
Modified code
I have only included the for loop in your browseFile() function as I have not made any changes to the rest of your code.
for x in range(workbook.nsheets):
tab.append(ttk.Frame(tabControl))
sheetName = workbook.sheet_names()
tabControl.add(tab[x], text = sheetName[x])
df_table = excel_file.parse(sheetName[x], header=None) # header=None stops the first line of the data table being used as the column header, making it appear in the data table
# Iterates through each row, creating a Label widget for each cell on that row.
for i in df_table.itertuples():
i=list(i) # Converts the row to a more helpful list format
row = i.pop(0) # pop returns value at position, then removes it, as we don't wan't first value of tuple (row number) in spreadsheet
for j in range(len(i)):
# Next two lines get the current column in a list format and convert all items to a string, in order to determine the longest item to make all label widgets the correct width.
current_column = list(df_table.iloc[:, j])
for k in range(len(current_column)): current_column[k] = str(current_column[k])
# Makes label widget
lbl = Label(tab[x], text = i[j], borderwidth=2, relief="ridge", width=len(max(current_column, key=len)), justify=LEFT).grid(row=row, column=j+1)
PS: I really enjoyed solving this question. Thanks for asking!