The keys method returns the list of keys.
The value method returns the list of values.
The items methods returns the list of 2-tuples of key-value pairs.
>>> h = {"john": 42.0, "mary": 999, 6.046: 'A'}
>>> h.keys()
['john', 'mary', 6.0460000000000003]
>>> h.values()
[42.0, 999, 'A']
>>> h.items()
[('john', 42.0), ('mary', 999), (6.0460000000000003, 'A')]
The has_key method returns True if the given key is in the dictionary.
>>> h.has_key("john")
True
>>> h.has_key("judith")
False
>>> h.has_key(6.046)
True
>>> h.has_key(6.043)
False
The clear method removes all the items from the dictionary.
>>> h.clear()
>>> h
{}
The copy method creates a new dictionary with the same key and value pairs, but the dictionary is not the same as the original one. So, change done to one will not affect the other.
>>> h = {"alyssa":42, "ben":4649, "clark":44.193}
>>> h.copy()
{'ben': 4649, 'alyssa': 42, 'clark': 44.192999999999998}
>>> g = h.copy()
>>> h["alyssa"] = 999
>>> h
{'ben': 4649, 'alyssa': 999, 'clark': 44.192999999999998}
>>> g
{'ben': 4649, 'alyssa': 42, 'clark': 44.192999999999998}
>>> g["alyssa"] = 765
>>> g
{'ben': 4649, 'alyssa': 765, 'clark': 44.192999999999998}