import tkinter as tki

# Create a main window
root = tki.Tk()

# Creating widgets
button = tki.Button(root, text = "hi")

# Configuring widgets
button.configure(fg="yellow")
button["bg"] = "blue"

# Packing
button.pack(side=tki.TOP)

# Event handlers
def my_event_handler(event):
    print("entering " + event.widget["text"])

# Binding event handlers to widget
button.bind("<Enter>",my_event_handler)

# Listen to events generated by the button
button.configure(command=lambda: print("clicking hi"))

# Run the event loop
root.mainloop()