Computer Networking: A Top-Down Approach (7th Edition)
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ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Write a GUI program using Python tkinter module that calculates a car’s gas mileage. The program’s window should have Entry widgets that let the user enter the number of gallons of gas the car holds, and the number of miles it can be driven on a full tank. Use the kilo_converter.py program as a design reference for this assignment. When a Calculate MPG button is clicked, the program should display the number of miles that the car may be driven per gallon of gas. Use the Python tkinter module for this Python program. Use the following formula to calculate miles-per-gallon:
MPG = miles/gallons
kilo_converter.py program:
Transcribed Image Text:Program 15-9 (kilo_converter.py)
1 # This program converts distances in kilometers
2 # to miles. The result is displayed in an info
3 # dialog box.
4
import tkinter
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class KiloConverterGUI:
definit__(self):
#Create the main window.
self.main_window= tkinter.Tk ()
# Create two frames to group widgets.
self.top_frame= tkinter. Frame(self.main_window)
self.bottom_frame = tkinter. Frame(self.main_window)
#Create the widgets for the top frame.
self.prompt_label= tkinter.Label(self.top_frame, \
text='Enter a distance in kilometers:')
self.kilo_entry tkinter.Entry(self.top_frame, \
# Pack the top frame's widgets.
self.prompt_label.pack (side='left')
self.kilo_entry.pack (side='left')
#Create the button widgets for the bottom frame.
self.calc_button tkinter. Button(self.bottom_frame, \
text='Convert', \
command-self.convert)
self.quit_button = tkinter. Button(self.bottom_frame, \
text='Quit', \
command=self.main_window.destroy)
width=10)
#Pack the buttons.
self.calc_button.pack (side="left')
self.quit_button.pack (side='left')
#Pack the frames.
self.top_frame.pack()
self.bottom_frame.pack()
#Enter the Tkinter main loop.
tkinter.mainloop()
# The convert method is a callback function for
#the Calculate button.
def convert (self):
# Get the value entered by the user into the
#kilo_entry widget.
kilo float (self.kilo_entry.get())
# Convert kilometers to miles.
miles kilo * 0.6214
# Display the results in an info dialog box.
tkinter.messagebox.showinfo('Results', \
str(kilo) + kilometers is equal to +\
str(miles) + miles.')
'
60
61
62 # Create an instance of the KiloConverterGUI class.
63 kilo_conv=KiloConverterGUI ()
Page 122
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