Chromakey

1
Session 18

• Chromakey

2
Review from last time

• In an if statement you can join multiple
  conditions by using and, or, or not
• xlty and xltz
• agtb or agtc
• To negate something, use not
• not rq (which is the same as r!q

3
Review from last time

• If you want to take exactly one of several
  choices than you use elif
• if (agegt18)
• print You have been eligible to vote for a
  while
• elif (age18)
• print Hey, you can vote now
• else
• print One of these days, you can vote

4
ChromaKey

• You have all seen TV weather reports where they
  use ChromaKey to put a background behind the
  reporter

5
I want to do that!