Is there good way to save text input from tkinter Text widget

I think that the problem is that the "Text" is formatted well only using the Tkfixedfont font.

I made some changes, replaced the format type, deleted the bold and size and used the format() function to align the text.

from tkinter import *from tkinter.filedialog import asksaveasfilenamefrom tkinter.messagebox import askyesno# ------------app = Tk()# =================== frames ========================frame1 = Frame(app)frame1.pack(side=TOP)# ----title_label = Label(frame1, text="Facture", font=("courier", 40, 'bold'))title_label.pack()# ----frame2 = Frame(app, bd=5)frame2.pack(side=TOP)# ----frame3 = Frame(app)frame3.pack(side=TOP)# ============================================# ======--- text field -----======text_input = Text(frame2,bg="aliceblue", fg='black', font=('TkFixedFont'))text_input.pack(expand = True)# ============ in text field ===============header = "{0} {1} {2}\n".format("-"*35,"Facture", "-"*35)text_input.insert(END, header)fields = "{0:10}{1:40}{2:20}{3:8}\n".format("Qty", "Product", "PU", "PV/TVAC")text_input.insert(END, fields)rs = (("1", "FANTA CITRON", "2500", "2500"),        ("1", "BUFFET PER HEAD", "10000", "10000"),        ("1", "MUKEKE GRILLE OIGNONS", "16000", "16000"),)for i in rs:    fields = "{0:10}{1:40}{2:20}{3:10}\n".format(i[0], i[1], i[2], i[3])    text_input.insert(END, fields)    footer = "{0:70}{1}".format("TOTAL","28500")text_input.insert(END, footer)# --------- functions ---------def save():    filepath = asksaveasfilename(        defaultextension = "csv",        filetypes = [("Text Files", "*.csv"), ("All Files", "*.*")])    if not filepath:        return    with open(filepath, 'w') as output_file:        text = text_input.get('1.0', END)        output_file.write(text)def printR():    passdef delete():    text_input.delete('1.0', END)def exit():    iExit = askyesno("Attention", "You are on your way to quit\nAre you sure you want quit")    if iExit > 0:        app.destroy()# ----------------------------------# ============---------------===============# =====--------- Buttons -----------========save_button = Button(frame3, text="Save", height=3, width=10, command=save)save_button.grid(row=0, column=0, padx=2)# ----------------print_button = Button(frame3, text="Print", height=3, width=10, command=printR)print_button.grid(row=0, column=1, padx=2)# ----------------delete_button = Button(frame3, text="Delete", height=3, width=10, command=delete)delete_button.grid(row=0, column=2, padx=2)# ----------------quit_button = Button(frame3, text="Exit", height=3, width=10, command=exit)quit_button.grid(row=0, column=3, padx=2)# ============================================app.mainloop()