Lists and Dictionaries

nums = [3, 1, 2]
nums.append(4)       # [3, 1, 2, 4]
nums.sort()          # [1, 2, 3, 4]
print(nums[0], nums[-1], nums[1:3])  # 1 4 [2, 3]

squares = [n * n for n in range(5) if n % 2 == 0]  # [0, 4, 16]

user = {"name": "Asha", "age": 21}
user["city"] = "Pune"
print(user.get("email", "n/a"))   # n/a

for key, value in user.items():
    print(key, value)

lengths = {w: len(w) for w in ["code", "prep"]}