Create a Text Editor in Python

Create a Text Editor in Python:

(1) Open the PyCharm code editor and create a new project in it. We named the project text_editor.py. To build a Text Editor in Python we need to install the package. For this open the terminal in PyCharm and install one package i.e. tkinter. You install this package by simply typing in the terminal following command i.e. pip install tk and then press enter as shown below.

Note: If the package shows an error while using in the code, you can simply install the package by clicking on the red bulb which appears below the error and you can directly install the package from here.

(2) Now write the following code for creating a Text Editor in Python as shown below.

Python Text Editor Source Code:

import os
from tkinter import *
from tkinter import filedialog, colorchooser, font
from tkinter.messagebox import *
from tkinter.filedialog import *

def change_color():
    color = colorchooser.askcolor(title="pick a color...or else")
    text_area.config(fg=color[1])

def change_font(*args):
    text_area.config(font=(font_name.get(), size_box.get()))

def new_file():
    window.title("Untitled")
    text_area.delete(1.0, END)

def open_file():
    file = askopenfilename(defaultextension=".txt",
                           file=[("All Files", "*.*"),
                                ("Text Documents", "*.txt")])

    if file is None:
        return

    else:
        try:
            window.title(os.path.basename(file))
            text_area.delete(1.0, END)

            file = open(file, "r")

            text_area.insert(1.0, file.read())

        except Exception:
            print("couldn't read file")

        finally:
            file.close()

def save_file():
    file = filedialog.asksaveasfilename(initialfile='unititled.txt',
                                        defaultextension=".txt",
                                        filetypes=[("All Files", "*.*"),
                                                   ("Text Documents", "*.txt")])

    if file is None:
        return

    else:
        try:
            window.title(os.path.basename(file))
            file = open(file, "w")

            file.write(text_area.get(1.0, END))

        except Exception:
            print("couldn't save file")

        finally:
            file.close()

def cut():
    text_area.event_generate("<<Cut>>")

def copy():
    text_area.event_generate("<<Copy>>")

def paste():
    text_area.event_generate("<<Paste>>")


def about():
    showinfo("About this program", "This is a basic text editor program written by YOU....")

def quit():
    window.destroy()

window = Tk()
window.title("Simple Text Editor")
file = None

window_width = 600
window_height = 600
screen_width = window.winfo_screenwidth()
screen_height = window.winfo_screenheight()

x = int((screen_width / 2) - (window_width / 2))
y = int((screen_height / 2) - (window_height / 2))

window.geometry("{}x{}+{}+{}".format(window_width, window_height, x, y))

font_name = StringVar(window)
font_name.set("Open Sans")

font_size = StringVar(window)
font_size.set("20")

text_area = Text(window, font=(font_name.get(), font_size.get()))

scroll_bar = Scrollbar(text_area)
window.grid_rowconfigure(0, weight=1)
window.grid_columnconfigure(0, weight=1)
text_area.grid(sticky=N + E + S + W)
scroll_bar.pack(side=RIGHT, fill=Y)
text_area.config(yscrollcommand=scroll_bar.set)

frame = Frame(window)
frame.grid()

color_button = Button(frame, text="color", command=change_color)
color_button.grid(row=0, column=0)

font_box = OptionMenu(frame, font_name, *font.families(), command=change_font)
font_box.grid(row=0, column=1)

size_box = Spinbox(frame, from_=1, to=100, textvariable=font_size, command=change_font)
size_box.grid(row=0, column=2)

menu_bar = Menu(window)
window.config(menu=menu_bar)

file_menu = Menu(menu_bar, tearoff=0)
menu_bar.add_cascade(label="File", menu=file_menu)
file_menu.add_command(label="New", command=new_file)
file_menu.add_command(label="Open", command=open_file)
file_menu.add_command(label="Save", command=save_file)
file_menu.add_separator()
file_menu.add_command(label="Exit", command=quit)

edit_menu = Menu(menu_bar, tearoff=0)
menu_bar.add_cascade(label="Edit", menu=edit_menu)
edit_menu.add_command(label="Cut", command=cut)
edit_menu.add_command(label="Copy", command=copy)
edit_menu.add_command(label="Paste", command=paste)

help_menu = Menu(menu_bar, tearoff=0)
menu_bar.add_cascade(label="Help", menu=help_menu)
help_menu.add_command(label="About", command=about)

window.mainloop()

(3) After running the code, the output window will pop us as shown below.