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inverse.py
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inverse.py
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from tkinter import Label, Button, Entry, OptionMenu, IntVar, StringVar, Frame, Toplevel
from tkinter.constants import BOTH
from numpy.linalg import inv
import menu
alphabet = 'abcdefghijklmnopqrstuvwxyz'
class Inverse:
def back_to_menu(self):
self.gui_inverse_output.destroy()
menu.gui_menu.deiconify()
def compute_inverse(self):
# convert matrix of strings to integers
try:
for i in range(self.rows):
for j in range(self.cols):
self.matrix[i][j] = int(self.matrix[i][j])
except (NameError, TypeError, Exception):
# Label(self.frame_inverse_output, text="Invalid input(s)").grid(row=1, column=2)
pass
try:
# invert matrix then convert back to string
self.matrix = inv(self.matrix)
list_mat = [str(i) for i in self.matrix]
# remove square brackets
for i in range(len(list_mat)):
list_mat[i] = list_mat[i][1:-1]
return list_mat
except (TypeError, Exception):
Label(self.frame_inverse_output, text="(Your matrix is").grid(row=1, column=self.cols * 2 + 1)
Label(self.frame_inverse_output, text="not invertible!)").grid(row=2, column=self.cols * 2 + 1)
def output_matrix(self):
# create window
self.gui_inverse_input.destroy()
self.gui_inverse_output = Toplevel()
self.gui_inverse_output.title("Inverse")
self.gui_inverse_output.resizable(False, False)
self.frame_inverse_output = Frame(self.gui_inverse_output, highlightbackground='black', highlightthickness=1)
self.frame_inverse_output.pack(fill=BOTH, expand=True, padx=5, pady=5)
# go back to menu button
Button(self.frame_inverse_output, text="Back", width=4, command=self.back_to_menu).grid(
row=self.rows + 10,
column=1)
# display user input
Label(self.frame_inverse_output, text='Input:', font=('arial', 10, 'bold'), underline=0).grid(row=1, column=1)
for i in range(self.rows):
for j in range(self.cols):
Label(self.frame_inverse_output, text=self.matrix[i][j], bd=5).grid(row=i + 1, column=j + 2)
# display output
Label(self.frame_inverse_output, text='Inverted:', font=('arial', 10, 'bold'), underline=0).grid(row=1,
column=self.cols * 2)
inverse_matrix = self.compute_inverse()
for i in range(self.rows):
Label(self.frame_inverse_output, text=inverse_matrix[i], bd=5).grid(
row=i + 1, column=self.cols * 2 + 1)
# def disable_event():
# pass
self.gui_inverse_output.protocol("WM_DELETE_WINDOW", menu.gui_menu.destroy)
self.gui_inverse_output.mainloop()
def input_matrix(self):
self.gui_inverse_menu.destroy()
self.gui_inverse_input = Toplevel()
self.gui_inverse_input.title("Inverse")
self.gui_inverse_input.resizable(False, False)
self.frame_inverse_input = Frame(self.gui_inverse_input, highlightbackground='black', highlightthickness=1)
self.frame_inverse_input.pack(fill=BOTH, expand=True, padx=5, pady=5)
# window_dimensions = str(self.m_length.get()**3+90) + "x" + str(self.m_height.get())
# print(window_dimensions)
# window.geometry(window_dimensions)
# self.gui_inverse_input.resizable(False, False)
Label(self.frame_inverse_input, text="Enter matrix:", font=('arial', 10, 'bold')).grid(row=1, column=1)
# to create matrix of entry cells we need to create a 2d list of entries
# thank god to stackoverflow peeps for that
# empty arrays for Entry and StringVars
text_var = []
entries = []
self.rows, self.cols = (self.m_dimensions.get(), self.m_dimensions.get())
for i in range(self.rows):
# append an empty list to arrays to append to later
text_var.append([])
entries.append([])
for j in range(self.cols):
# for column indications
if i == 1:
Label(self.frame_inverse_input, text=alphabet[j]).grid(row=1, column=j + 2)
# append StringVar
text_var[i].append(StringVar())
# append the entry into the list
entries[i].append(Entry(self.frame_inverse_input, textvariable=text_var[i][j], width=3))
# display entry
entries[i][j].grid(row=i + 2, column=j + 2)
# for row indications
Label(self.frame_inverse_input, text=i + 1).grid(row=i + 2, column=1, sticky='e')
# callback function to get StringVars/convert them to strings
# and store in matrix[]
def get_mat():
try:
self.matrix = []
for i2 in range(self.rows):
self.matrix.append([])
for j2 in range(self.cols):
self.matrix[i2].append(text_var[i2][j2].get())
self.output_matrix()
except (ValueError, Exception):
# Label(self.frame_inverse_output, text="Invalid input(s)").grid(row=1, column=2)
Label(self.frame_inverse_output, text="(Your matrix is").grid(row=1, column=self.cols * 2 + 1)
Label(self.frame_inverse_output, text="not invertible!)").grid(row=2, column=self.cols * 2 + 1)
Button(self.frame_inverse_input, text="Enter", width=8, command=get_mat).grid(row=self.cols + 10,
column=1)
self.gui_inverse_input.protocol("WM_DELETE_WINDOW", menu.gui_menu.destroy)
self.gui_inverse_input.mainloop()
def __init__(self):
self.gui_inverse_input, self.gui_inverse_output = None, None
self.frame_inverse_output, self.frame_inverse_input = None, None
self.frame_inverse_menu = None
self.inverse_matrix = []
self.rows, self.cols = None, None
self.matrix = None
menu.gui_menu.withdraw()
self.gui_inverse_menu = Toplevel()
self.gui_inverse_menu.title("Inverse")
self.gui_inverse_menu.resizable(False, False)
self.frame_inverse_menu = Frame(self.gui_inverse_menu, highlightbackground='black', highlightthickness=1)
self.frame_inverse_menu.pack(fill=BOTH, expand=True, padx=5, pady=5)
Label(self.frame_inverse_menu, text='Enter matrix dimensions:', font=('arial', 10, 'bold')).grid(row=4, column=1)
# enter matrix dimensions
self.m_dimensions = IntVar()
self.m_dimensions.set(2)
OptionMenu(self.frame_inverse_menu, self.m_dimensions, *range(2, 5)).grid(row=4, column=2)
Button(self.frame_inverse_menu, text='Enter', padx=16, pady=5, command=self.input_matrix).grid(row=5, column=2)
self.gui_inverse_menu.protocol("WM_DELETE_WINDOW", menu.gui_menu.destroy)
self.gui_inverse_menu.mainloop()