# Accurate GPA Calculator – Quickly Calculate Your Grade Point Average with Tkinter

## Accurate GPA Calculator – Quickly Calculate Your Grade Point Average with Tkinter Accurate GPA Calculator – Quickly Calculate Your Grade Point Average with Tkinter

## Importing necessary libraries

The first step in creating our GPA calculator is to import the necessary libraries. In this case, we will be using the Tkinter library to create the GUI and the messagebox library to display error messages.

```import tkinter as tk
from tkinter import messagebox
```

## Creating the “calculate_gpa” function

The next step is to create a function that will handle the calculation of the GPA. This function will be triggered when the user clicks the “Calculate GPA” button.

```def calculate_gpa():
# Get the grades and credit hours from the entry widgets
credit_hours = credit_entry.get()

# Split the grades and credit hours into lists
credit_hours = credit_hours.split(',')

# Convert the grades and credit hours to float
credit_hours = [float(hour) for hour in credit_hours]

# Check that the number of grades and credit hours match
messagebox.showerror("Error", "The number of grades and credit hours must match.")
return

# Calculate the weighted average
weighted_sum = 0
total_hours = 0
total_hours += credit_hours[i]

# Calculate the GPA
gpa = weighted_sum / total_hours

# Display the GPA
gpa_label.config(text=f"GPA: {gpa:.2f}")
```

This function first gets the input from the entry widgets, performs the necessary calculation, and displays the result in the gpa_label widget.

## Creating the window and widgets

The next step is to create the window and the necessary widgets. We create a new window using the Tk() class, and set the title to “GPA Calculator”. We also create labels and entry widgets for the user to input their grades and credit hours, a button to trigger the calculation, and a label to display the result.

```# Create a new window
root = tk.Tk()
root.title("GPA Calculator")

# Create labels and entry widgets for the grades and credit hours
credit_label = tk.Label(root, text="Credit hours (comma separated):")
credit_entry = tk.Entry(root)

# Create a button to trigger the GPA calculation
calculate_button = tk.Button(root, text="Calculate GPA", command=calculate_gpa)
#Create a label to display the GPA
gpa_label = tk.Label(root, text="")
```

## Organizing the layout:

The layout of the widgets is organized using the grid method, which allows for precise positioning of the widgets within the window.

```# Organize the layout using the grid method
credit_label.grid(row=1, column=0)
credit_entry.grid(row=1, column=1)
calculate_button.grid(row=2, column=0, columnspan=2)
gpa_label.grid(row=3, column=0, columnspan=2)
```

## Combine Code

```import tkinter as tk
from tkinter import messagebox

def calculate_gpa():
# Get the grades and credit hours from the entry widgets
credit_hours = credit_entry.get()

# Split the grades and credit hours into lists
credit_hours = credit_hours.split(',')

# Convert the grades and credit hours to float
credit_hours = [float(hour) for hour in credit_hours]

# Check that the number of grades and credit hours match
messagebox.showerror("Error", "The number of grades and credit hours must match.")
return

# Calculate the weighted average
weighted_sum = 0
total_hours = 0
total_hours += credit_hours[i]

# Calculate the GPA
gpa = weighted_sum / total_hours

# Display the GPA
gpa_label.config(text=f"GPA: {gpa:.2f}")

# Create a new window
root = tk.Tk()
root.title("GPA Calculator")

# Create labels and entry widgets for the grades and credit hours
credit_label = tk.Label(root, text="Credit hours (comma separated):")
credit_entry = tk.Entry(root)

# Create a button to trigger the GPA calculation
calculate_button = tk.Button(root, text="Calculate GPA", command=calculate_gpa)

# Create a label to display the GPA
gpa_label = tk.Label(root, text="")

# Organize the layout using the grid method
credit_label.grid(row=1, column=0)
credit_entry.grid(row=1, column=1)
calculate_button.grid(row=2, column=0, columnspan=2)
gpa_label.grid(row=3, column=0, columnspan=2)

root.mainloop()
```

## Running the program

Finally, we run the program using the `root.mainloop()` function which will keep the program running and waiting for user input until the window is closed.

## Output Simple GPA

• 