Punctuation  Commas  Whenever a pause is appropriate, or required to avoid ambiguity  Lists: red, blue, black, and white (oxford/serial comma)  Special sentence start: However, Hence, Therefore,

color='black', design=None, x='foo', emphasis=None, highlight=0) if (width == 0 and height == 0 and color == 'red' and emphasis == 'strong'): When a literal string won’t fit on a single line, use parentheses for