Lists

A list comprehension builds a new list in one line: [x for x in items if condition] reads almost like the English sentence it describes - "x, for each x in items, where condition holds." It replaces the loop-plus-append pattern you'd otherwise write by hand.

You can drop the if entirely to transform every item instead of filtering them ([x * 2 for x in items]), but this lesson is about keeping some items and dropping others, so the condition is the part that matters.

Your task: given the list scores, write passing(scores), returning a new list with only the scores that are 60 or above.

You'll practice:

Filtering a list with a list comprehension
Writing a condition inside the comprehension

{
  "language": "python",
  "starterCode": "scores = [55, 72, 90, 48, 63, 100, 59]\n\n# Write passing(scores): list of scores that are 60 or above.\ndef passing(scores):\n    pass",
  "solution": "scores = [55, 72, 90, 48, 63, 100, 59]\n\ndef passing(scores):\n    return [s for s in scores if s >= 60]",
  "hints": ["A list comprehension looks like [x for x in items if condition].", "The condition here is s >= 60.", "passing(scores) should return [72, 90, 63, 100]."],
  "tests": [
    { "name": "passing keeps only scores >= 60", "code": "assert passing(scores) == [72, 90, 63, 100], 'passing(scores) should be [72, 90, 63, 100]'" },
    { "name": "passing works on a new list", "code": "assert passing([10, 60, 61, 59]) == [60, 61], 'passing should keep scores >= 60'" }
  ]
}