Python error tkinter TclError unknown font style Normal

Question

This line:

pen.clear()
pen.write("score: {} High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "Normal"))

Gives me the following error:

_tkinter.TclError: unknown font style "Normal"

Answer 1

Change the line 

pen.write("score: {} High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "Normal"))

To:

pen.write("score: {} High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "normal"))

Its not "Normal", its "normal".