del — Intermediate Playground

# Delete a slice
nums = list(range(10))
del nums[2:5]
print(nums)

# Delete every other element
nums = list(range(10))
del nums[::2]
print(nums)

# Delete object attributes
class Config:
    def __init__(self):
        self.debug = True
        self.verbose = True
        self.port = 8080

cfg = Config()
print(vars(cfg))
del cfg.debug
print(vars(cfg))

# del with __delitem__
class SafeDict(dict):
    def __delitem__(self, key):
        if key.startswith("_"):
            raise KeyError(f"Cannot delete private key: {key}")
        super().__delitem__(key)

d = SafeDict({"name": "Alice", "_id": 1})
del d["name"]
try:
    del d["_id"]
except KeyError as e:
    print(f"Protected: {e}")
print(d)