Welcome folks today in this tutorial we will be making a distance-time calculator desktop app using the google maps distance matrix api in python full project for beginners. All the source code of the application is shown below.

Get Started

In order to get started you need to install the following libraries inside your python project by using the pip command

pip install tkinter

pip install requests

pip install json

Now after installing all these libraries make an app.py file and copy paste the following code

app.py

# Python3 program to create Distance 
# Time GUI calculator using Tkinter 

# import everything from tkinter modules 
from tkinter import *

# import modules 
import requests, json 


# Function for finding distance 
# and duration between two places 
def result(source, destination, travel_modes): 

    # Enter your API key here 
    api_key = 'Your_api_key'

    # base variable to store base url 
    base = 'https://maps.googleapis.com/maps/api/distancematrix/json?'

    # Check travel modes 
    if travel_modes == "train": 

        # complete_url variable to store complete url address 
        complete_url = base + 'origins='+source+"&destinations="+destination+"&mode=transit&transit_mode=train&key="+api_key 

        # get method of requests module 
        # return response object 
        r = requests.get(complete_url) 
        
    else: 
        
        # complete_url variable to 
        # store complete url address 
        complete_url = base + 'origins =' + source+ \ 
                    '&destinations ='+ destination + \ 
                    '&mode ='+travel_modes+'&key ='+ api_key 

        # get method of requests module 
        # return response object 
        r = requests.get(complete_url) 

    # json method of response object convert 
    # json format data into python format data 
    x = r.json() 

    # x contains list of nested dictionaries 
    # we know dictionary contains key value pair 
    
    # Extracting useful information 
    # from x dictionary 
    row = x['rows'][0] 
    cell = row['elements'][0] 

    # Check value corresponding to 
    # status key in cell dictionary 
    if cell['status'] == 'OK' : 

        # insert method inserting the 
        # value in the text entry box. 
        # Extracting useful information 
        # from cell dictionary and inserting 
        # into the respective text fields. 
        distance_field.insert(10, cell['distance']['text']) 
        duration_field.insert(10, cell['duration']['text']) 
        
    else : 
        
        # insert method inserting the 
        # value in the text entry box. 
        # Extract value corresponding to 
        # status key from cell dictionary and 
        # inserting into the respective text fields. 
        mode_field.insert(10, cell['status']) 
        distance_field.insert(10, cell['status']) 

# Function for getting values from 
# respective text entry boxes and 
# calling result function .                          
def find() : 

    # get method returns current text 
    # as a string from text entry box 
    source = source_field.get() 
    destination = destination_field.get() 
    travel_modes = mode_field.get() 

    # Calling result() Function 
    result(source, destination, travel_modes) 

# Function for inserting the train string 
# in the mode_field text entry box 
def train() : 
    mode_field.insert(10, "train") 

# Function for inserting the driving string 
# in the mode_field text entry box 
def driving() : 
    mode_field.insert(10, "driving") 

# Function for inserting the walking string 
# in the mode_field text entry box 
def walking() : 
    mode_field.insert(10, "walking") 

# Function for clearing the contents 
# of source_field, distance_field, 
# duration_field text entry boxes. 
def del_source() : 
    source_field.delete(0, END) 
    distance_field.delete(0, END) 
    duration_field.delete(0, END) 

# Function for clearing the contents of 
# destination_field, distance_field, 
# duration_field text entry boxes. 
def del_destination() : 
    destination_field.delete(0, END) 
    distance_field.delete(0, END) 
    duration_field.delete(0, END) 

# function for clearing the contents of mode_field, 
# distance_field, duration_field text entry boxes. 
def del_modes() : 
    mode_field.delete(0, END) 
    distance_field.delete(0, END) 
    duration_field.delete(0, END) 

# Function for clearing the 
# contents of all text entry boxes 
def delete_all() : 
    source_field.delete(0, END) 
    destination_field.delete(0, END) 
    mode_field.delete(0, END) 
    distance_field.delete(0, END) 
    duration_field.delete(0, END) 


# Driver code 
if __name__ == "__main__" : 

    # Create a GUI window 
    root = Tk() 

    # Set the background colour of GUI window 
    root.configure(background = 'light green') 

    # Set the configuration of GUI window 
    root.geometry("500x300") 

    # Create a welcome to distance time calculator label 
    headlabel = Label(root, text = 'welcome to distance time calculator', 
                    fg = 'black', bg = "red") 
    
    # Create a Source: label 
    label1 = Label(root, text = "Source:", 
                fg = 'black', bg = 'dark green') 

    # Create a Destination: label 
    label2 = Label(root, text = "Destination:", 
                fg = 'black', bg = 'dark green') 
    
    # Create a Choose travelling modes: label 
    label3 = Label(root, text = "Choose travelling modes: ", 
                fg = 'black', bg = 'red') 

    # Create a Distance: label 
    label4 = Label(root, text = "Distance:", 
                    fg = 'black', bg = 'dark green') 

    # Create a Duration: label 
    label5 = Label(root, text = "Duration:", 
                    fg = 'black', bg = 'dark green') 
    
    # grid method is used for placing 
    # the widgets at respective positions 
    # in table like structure . 
    headlabel.grid(row = 0, column = 1) 
    label1.grid(row = 1, column = 0, sticky ="E") 
    label2.grid(row = 2, column = 0, sticky ="E") 
    label3.grid(row = 3, column = 1) 
    label4.grid(row = 7, column = 0, sticky ="E") 
    label5.grid(row = 8, column = 0, sticky ="E") 
    
    # Create a text entry box 
    # for filling or typing the information. 
    source_field = Entry(root) 
    destination_field = Entry(root) 
    mode_field = Entry(root) 
    distance_field = Entry(root) 
    duration_field = Entry(root) 

    # grid method is used for placing 
    # the widgets at respective positions 
    # in table like structure . 
    # ipadx keyword argument set width of entry space . 
    source_field.grid(row = 1, column = 1, ipadx ="100") 
    destination_field.grid(row = 2, column = 1, ipadx ="100") 
    mode_field.grid(row = 5, column = 1, ipadx ="50") 
    distance_field.grid(row = 7, column = 1, ipadx ="100") 
    duration_field.grid(row = 8, column = 1, ipadx ="100") 


    # Create a CLEAR Button and attached 
    # to del_source function 
    button1 = Button(root, text = "CLEAR", bg = "red", 
                    fg = "black", command = del_source) 

    # Create a CLEAR Button and attached to del_destination 
    button2 = Button(root, text = "CLEAR", bg = "red", 
                    fg = "black", command = del_destination) 

    # Create a RESULT Button and attached to find function 
    button3 = Button(root, text = "RESULT", 
                    bg = "red", fg = "black", 
                                command = find) 

    # Create a CLEAR ALL Button and attached to delete_all function 
    button4 = Button(root, text = "CLEAR ALL", 
                    bg = "red", fg = "black", 
                            command = delete_all) 

    # Create a Train Button and attached to train function 
    button5 = Button(root, text = "Train", command = train) 

    # Create a Driving Button and attached to driving function 
    button6 = Button(root, text = "Driving", command = driving) 

    # Create a Walking Button and attached to walking function 
    button7 = Button(root, text = "Walking", command = walking) 

    # Create a CLEAR Button and attached to del_modes function 
    button8 = Button(root, text = "CLEAR", 
                    fg = "black", bg = "red", 
                        command = del_modes) 

    # grid method is used for placing 
    # the widgets at respective positions 
    # in table like structure . 
    button1.grid(row = 1, column = 2) 
    button2.grid(row = 2, column = 2) 
    button3.grid(row = 6, column = 1) 
    button4.grid(row = 9, column = 1) 
    button5.grid(row = 4, column = 0) 
    button6.grid(row = 4, column = 1) 
    button7.grid(row = 4, column = 2) 
    button8.grid(row = 5, column = 2) 

    # Start the GUI 
    root.mainloop()

Now inside this python script just replace the api_key and then run this by typing the below command

python app.py