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from binascii import hexlify, unhexlify
from itertools import izip_longest
import Tkinter as tk
import tkFileDialog as tk_file_dialog
DEFAULT_FILE_TYPES = (
 ("Hexadecimal Files", "*.hex"),
 ("Windows Executables", "*.exe"),
 ("Linux Binaries", "*.elf"),
 ("all files", "*.*")
)
def character_grouper(iterable, n):
 """Group consecutive n values of iterable into tuples.
 Pad the last tuple with '' if need be.
 >>> list(character_grouper('This is a test', 3))
 [('T', 'h', 'i'), ('s', ' ', 'i'), ('s', ' ', 'a'), (' ', 't', 'e'), ('s', 't', '')]
 """
 args = [iter(iterable)] * n
 return izip_longest(*args, fillvalue='')
class Window():
 def __init__(self, width=47, height=20):
 """Create an editor window.
 Editor will allow you to select a file to inspect and
 modify its content as hexadecimal values.
 """
 self.root = tk.Tk()
 self.width = width
 self.height = height
 self.filename = ""
 self.raw_data = ""
 self.lines = []
 self.line_number = 0
 self.create_widgets()
 def run(self):
 """Start the Tkinter main loop on this window and wait for its destruction"""
 self.root.mainloop()
 def create_widgets(self):
 self.menu = tk.Menu(self.root)
 self.filemenu = tk.Menu(self.menu, tearoff=0)
 self.filemenu.add_command(label="Save", command=self.save_file, accelerator="Ctrl-s")
 self.filemenu.add_command(label="Save as...", command=self.saveas_window, accelerator="Ctrl-S")
 self.filemenu.add_command(label="Open...", command=self.open_window, accelerator="Ctrl-o")
 self.filemenu.add_separator()
 self.filemenu.add_command(label="Quit", command=self.save_and_close, accelerator="Ctrl-q")
 self.filemenu.add_command(label="Quit without saving", command=self.root.destroy, accelerator="Ctrl-Q")
 self.menu.add_cascade(label="File", menu=self.filemenu)
 self.main_text = tk.Text(self.root, width=self.width, height=self.height)
 self.main_text.pack(fill="both", expand=1)
 self.main_text.insert("1.0", self.format_current_buffer())
 self.root.config(menu=self.menu)
 self.root.bind("<Down>", self.scroll)
 self.root.bind("<Up>", self.scroll)
 self.root.bind("<Control-s>", self.save_file)
 self.root.bind("<Control-o>", self.open_window)
 self.root.bind("<Control-S>", self.saveas_window)
 self.root.bind("<Control-q>", self.save_and_close)
 self.root.bind("<Control-Q>", self.close)
 self.root.bind("<Configure>", self.resize)
 self.root.protocol('WM_DELETE_WINDOW', self.save_and_close)
 def resize(self, event=None):
 """Update the amount of characters on each row when the window is resized"""
 self.width = self.main_text.winfo_width() / 8
 self.height = self.main_text.winfo_height() / 16
 if self.width / 3 != 0:
 self._preprocess_raw_data()
 def open_file(self, filename):
 """Open a file and display the content"""
 self.filename = filename
 with open(filename, "rb") as f:
 self.raw_data = chr(0) + f.read()
 self.line_number = 0
 self._preprocess_raw_data()
 def _preprocess_raw_data(self):
 """Convert the content of a file to a list of lines
 suitable for the current width.
 """
 data = hexlify(self.raw_data)[2:]
 chars = self.width - (self.width / 3)
 self.lines = [
 "".join(line)
 for line in character_grouper(data, chars)
 ]
 self.main_text.delete("1.0", "end")
 self.main_text.insert("1.0", self.format_current_buffer())
 def save_file(self, event=None):
 """Save the current modifications into the current file"""
 self.update_current_buffer()
 with open(self.filename, "wb") as f:
 f.write(unhexlify("".join(self.lines)))
 def save_and_close(self, event=None):
 self.save_file()
 self.close()
 def close(self, event=None):
 self.root.destroy()
 def saveas_window(self, event=None):
 """Open the 'save as' popup"""
 f = tk_file_dialog.asksaveasfilename(filetypes=DEFAULT_FILE_TYPES)
 if f:
 self.filename = f
 self.save_file()
 def open_window(self, event=None):
 """Open the 'open' popup"""
 f = tk_file_dialog.askopenfilename(filetypes=DEFAULT_FILE_TYPES)
 if f:
 self.open_file(f)
 def format_current_buffer(self):
 """Create the text to display in the main text area.
 Each line of the current view window ("height" lines from current
 line) is formatted by inserting a space every two characters.
 """
 content = self.lines[self.line_number:self.line_number + self.height]
 return "\n".join(" ".join(character_grouper(line, 2)) for line in content)
 def update_current_buffer(self):
 """Save the modification made in the main text area into memory"""
 content = self.main_text.get("1.0", "end").replace(" ", "").split("\n")
 for i, line in enumerate(filter(bool, content)):
 self.lines[i + self.line_number] = line
 def scroll(self, event=None, direction=None):
 """Scroll up or down depending on the current position"""
 cursor_position = self.main_text.index("insert")
 current_line = int(cursor_position.split(".")[0])
 if current_line == self.height + 1:
 line_movement = 1
 elif current_line == 1:
 line_movement = -1
 else:
 return
 if 0 < self.line_number < len(self.lines) - self.height:
 self.update_current_buffer()
 self.line_number += line_movement
 self.main_text.delete("1.0", "end")
 self.main_text.insert("1.0", self.format_current_buffer())
 self.main_text.mark_set("insert", cursor_position)
if __name__ == '__main__':
 Window().run()

from binascii import hexlify, unhexlify
from itertools import izip_longest
import Tkinter as tk
import tkFileDialog as tk_file_dialog
DEFAULT_FILE_TYPES = (
 ("Hexadecimal Files", "*.hex"),
 ("Windows Executables", "*.exe"),
 ("Linux Binaries", "*.elf"),
 ("all files", "*.*")
)
def character_grouper(iterable, n):
 """Group consecutive n values of iterable into tuples.
 Pad the last tuple with '' if need be.
 >>> list(character_grouper('This is a test', 3))
 [('T', 'h', 'i'), ('s', ' ', 'i'), ('s', ' ', 'a'), (' ', 't', 'e'), ('s', 't', '')]
 """
 args = [iter(iterable)] * n
 return izip_longest(*args, fillvalue='')
class Window():
 def __init__(self, width=47, height=20):
 """Create an editor window.
 Editor will allow you to select a file to inspect and
 modify its content as hexadecimal values.
 """
 self.root = tk.Tk()
 self.width = width
 self.height = height
 self.filename = ""
 self.raw_data = ""
 self.lines = []
 self.line_number = 0
 self.create_widgets()
 def run(self):
 """Start the Tkinter main loop on this window and wait for its destruction"""
 self.root.mainloop()
 def create_widgets(self):
 self.menu = tk.Menu(self.root)
 self.filemenu = tk.Menu(self.menu, tearoff=0)
 self.filemenu.add_command(label="Save", command=self.save_file, accelerator="Ctrl-s")
 self.filemenu.add_command(label="Save as...", command=self.saveas_window, accelerator="Ctrl-S")
 self.filemenu.add_command(label="Open...", command=self.open_window, accelerator="Ctrl-o")
 self.filemenu.add_separator()
 self.filemenu.add_command(label="Quit", command=self.save_and_close, accelerator="Ctrl-q")
 self.filemenu.add_command(label="Quit without saving", command=self.root.destroy, accelerator="Ctrl-Q")
 self.menu.add_cascade(label="File", menu=self.filemenu)
 self.main_text = tk.Text(self.root, width=self.width, height=self.height)
 self.main_text.pack(fill="both", expand=1)
 self.main_text.insert("1.0", self.format_current_buffer())
 self.root.config(menu=self.menu)
 self.root.bind("<Down>", self.scroll)
 self.root.bind("<Up>", self.scroll)
 self.root.bind("<Control-s>", self.save_file)
 self.root.bind("<Control-o>", self.open_window)
 self.root.bind("<Control-S>", self.saveas_window)
 self.root.bind("<Control-q>", self.save_and_close)
 self.root.bind("<Control-Q>", self.close)
 self.root.bind("<Configure>", self.resize)
 self.root.protocol('WM_DELETE_WINDOW', self.save_and_close)
 def resize(self, event=None):
 """Update the amount of characters on each row when the window is resized"""
 self.width = self.main_text.winfo_width() / 8
 self.height = self.main_text.winfo_height() / 16
 if self.width / 3 != 0:
 self._preprocess_raw_data()
 def open_file(self, filename):
 """Open a file and display the content"""
 self.filename = filename
 with open(filename, "rb") as f:
 self.raw_data = chr(0) + f.read()
 self.line_number = 0
 self._preprocess_raw_data()
 def _preprocess_raw_data(self):
 """Convert the content of a file to a list of lines
 suitable for the current width.
 """
 data = hexlify(self.raw_data)[2:]
 chars = self.width - (self.width / 3)
 self.lines = [
 "".join(line)
 for line in character_grouper(data, chars)
 ]
 self.main_text.delete("1.0", "end")
 self.main_text.insert("1.0", self.format_current_buffer())
 def save_file(self, event=None):
 """Save the current modifications into the current file"""
 self.update_current_buffer()
 with open(self.filename, "wb") as f:
 f.write(unhexlify("".join(self.lines)))
 def save_and_close(self, event=None):
 self.save_file()
 self.close()
 def close(self, event=None):
 self.root.destroy()
 def saveas_window(self, event=None):
 """Open the 'save as' popup"""
 f = tk_file_dialog.asksaveasfilename(filetypes=DEFAULT_FILE_TYPES)
 if f:
 self.filename = f
 self.save_file()
 def open_window(self, event=None):
 """Open the 'open' popup"""
 f = tk_file_dialog.askopenfilename(filetypes=DEFAULT_FILE_TYPES)
 if f:
 self.open_file(f)
 def format_current_buffer(self):
 """Create the text to display in the main text area.
 Each line of the current view window ("height" lines from current
 line) is formatted by inserting a space every two characters.
 """
 content = self.lines[self.line_number:self.line_number + self.height]
 return "\n".join(" ".join(map("".join, character_grouper(line, 2))) for line in content)
 def update_current_buffer(self):
 """Save the modification made in the main text area into memory"""
 content = self.main_text.get("1.0", "end").replace(" ", "").split("\n")
 for i, line in enumerate(filter(bool, content)):
 self.lines[i + self.line_number] = line
 def scroll(self, event=None, direction=None):
 """Scroll up or down depending on the current position"""
 cursor_position = self.main_text.index("insert")
 current_line = int(cursor_position.split(".")[0])
 if current_line == self.height + 1:
 line_movement = 1
 elif current_line == 1:
 line_movement = -1
 else:
 return
 if 0 < self.line_number < len(self.lines) - self.height:
 self.update_current_buffer()
 self.line_number += line_movement
 self.main_text.delete("1.0", "end")
 self.main_text.insert("1.0", self.format_current_buffer())
 self.main_text.mark_set("insert", cursor_position)
if __name__ == '__main__':
 Window().run()

def character_grouper(iterable, n):
 """Group consecutive n values of iterable into tuples.
 Pad the last tuple with '' if need be.
 >>> list(character_grouper('This is a test', 3))
 [('T', 'h', 'i'), ('s', ' ', 'i'), ('s', ' ', 'a'), (' ', 't', 'e'), ('s', 't', '')]
 """
 args = [iter(iterable)] * n
 return izip_longest(*args, fillvalue='')

def character_grouper(iterable, n):
 """Group consecutive n values of iterable into tuples.
 Pad the last tuple with '' if need be.
 >>> list(character_grouper('This is a test', 3))
 [('T', 'h', 'i'), ('s', ' ', 'i'), ('s', ' ', 'a'), (' ', 't', 'e'), ('s', 't', '')]
 """
 args = [iter(iterable)] * n
 return itertools.izip_longest(*args, fillvalue='')