Python学习笔记之列表推导式实例分析

capitalized_cities = []
for city in cities:
  capitalized_cities.append(city.title())

capitalized_cities = [city.title() for city in cities]

squares = [x**2 for x in range(9) if x % 2 == 0]

squares = [x**2 if x % 2 == 0 else x + 3 for x in range(9)]

names = ["Rick Sanchez", "Morty Smith", "Summer Smith", "Jerry Smith", "Beth Smith"]
first_names = [name.split(' ')[0].lower() for name in names]
print(first_names) # ['rick', 'morty', 'summer', 'jerry', 'beth']

multiples_3 = [3 * num for num in range(1, 21)]
print(multiples_3) # [3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60]

scores = {
      "Rick Sanchez": 70,
      "Morty Smith": 35,
      "Summer Smith": 82,
      "Jerry Smith": 23,
      "Beth Smith": 98
    }
passed = [name for name, score in scores.items() if score >= 65]
print(passed) # ['Rick Sanchez', 'Beth Smith', 'Summer Smith']