python从字典删除元素的方法

python的字典可以通过del方法进行元素删除，下面的代码详细演示了这一过程

# 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