python实现从字典中删除元素的方法

# Create an empty dictionary
d = {}
# Add an item
d["name"] = "Fido"
assert d.has_key("name")
# Delete the item
del d["name"]
assert not d.has_key("name")
# Add a couple of items
d["name"] = "Fido"
d["type"] = "Dog"
assert len(d) == 2
# Remove all items
d.clear()
assert len(d) == 0