How to save a textbox as a pdf file

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Python

PDF

encoding

GUI

FPDF

I am trying to save a textbox text as a pdf file but I got an encoding error, I have tried the following:

What I have tried:

from tkinter import *
 from tkinter import ttk
 from tkinter import filedialog
 from tkinter.filedialog import askopenfile
 from tkinter.filedialog import * 
 from fpdf import FPDF

def export(self):
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font("Arial", size=15)
    pdf.cell(40, 10, self.agreemanttext.get("1.0", END).strip())
    pdf.output(asksaveasfilename(filetypes=[("PDF file", "*.pdf")]), "F")


def agreemnttext(self):
    self.buying_agreementsample_cash ="""text"""
    self.agreemanttextframe = Frame(self.agreemantpage, width=900, height=900)
    self.agreemanttextframe.place(x=1, y=40)
    self.agreemanttext = Text(self.agreemanttextframe, width=124, height=57)
    self.agreemanttext.pack()
    self.agreemanttext.tag_configure('tag-center', justify='right')
    self.agreemanttext.insert('end', self.buying_agreementsample_cash, 'tag-center')
    self.agreemanttext.config(state='disabled')

    self.exportbutton=Button(self.agreemantpage,text="export as pdf",command=self.export)
    self.exportbutton.place(x=80,y=600)

but I got this error: p = self.pages[n].encode("latin1") if PY3K else self.pages[n] UnicodeEncodeError: 'latin-1' codec can't encode characters in position 50-54: ordinal not in range(256)