Clear, errors and keyboard

Add a C button to clear, show 'Error' for dividing by zero, and bind keyboard keys so people can type sums.

Key points

root.bind("<Key>", handler)
except ZeroDivisionError
Return key = equals

def calculate():
    try:
        result = safe_eval(entry.get())
    except (ValueError, SyntaxError, ZeroDivisionError):
        result = "Error"
    entry.delete(0, tk.END)
    entry.insert(0, str(result))

root.bind("<Return>", lambda e: calculate())

Your turn

Add a C button and make Enter calculate.

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Quiz · +10 XP

Clear, errors and keyboard

Key points

Which exception happens when you divide by zero?