On Tue, 24 Jan 2006 16:01:48 +0100, Yves Glodt wrote:
> that means I can neither have a dictionary with 2 identical keys but
> different values...?
Yes, that's correct.
> I would need e.g. this:
> (a list of ports and protocols, to be treated later in a loop)
>
>
>
> ports = {'5631': 'udp', '5632': 'tcp', '3389': 'tcp', '5900': 'tcp'}
Which will work perfectly fine as a dict, because you have unique keys but
multiple values. Two keys with the same value is allowed.
Question: is there a reason the port numbers are stored as strings instead
of numbers?
> #then:
> for port,protocol in ports.iteritems():
> ________print port,protocol
> ________#do more stuff
>
>
> What would be the appropriate pythonic way of doing this?
Is it even possible to have multiple protocols listening on the
same port? Doesn't matter I suppose. Associating multiple values to the
same key is easy: just store the values in a list:
foods = { "red": ["apple", "tomato", "cherry"],
"green": ["apple", "lettuce", "lime"],
"blue": ["blueberry"],
"yellow": ["butter", "banana", "apple", "lemon"] }
# add a new colour
foods["orange"] = ["orange"]
# add a new food to a colour
foods["red"].append("strawberry")
for colour, foodlist in foods.iteritems():
for food in foodlist:
print colour, food
If you need to use the keys in a particular order, extract the keys and
sort them first:
colours = foods.keys()
colours.sort()
for colour in colours:
for food in foods[colour]:
print colour, food
--
Steven.
--
http://mail.python.org/mailman/listinfo/python-list
