On 12/10/2013 12:03, reubennott...@gmail.com wrote:
On Saturday, October 12, 2013 10:20:24 AM UTC+1, Peter Otten wrote:
reubennott...@gmail.com wrote:
I've been working on a program and have had to halt it due a slight
problem. Here's a basic version of the code:
a = 'filled'
b = 'filled'
c = 'empty'
d = 'empty'
e = 'filled'
f = 'empty'
g = 'filled'
testdict = {a : 'apple' , b : 'banana' , c : 'cake' , d : 'damson' , e :
'eggs' , f : 'fish' , g : 'glue'}
You have duplicate keys here, which becomes obvious when you spell out the
values
testdict = {"filled": "apple", "filled": "banana", ...}
When you do that, the last value ("banana") wins, all others (e. g. "apple")
are dropped.
Now what I want to do, is if a variable is filled, print it out. This
however isn't working how I planned. The following doesn't work.
for fillempt in testdict:
if fillempt == 'filled':
print(testdict[fillempt])
All this does though, is print glue, where I'd want it to print:
apple
banana
eggs
glue
Perhaps a dictionary isn't the best way to do this.. I wonder what else I
can do...
A dictionary is spot-on, but you have to use the unique "apple",
"banana",... as keys:
status = {"apple": "filled", "banana": "filled", "cake": "empty"}
for item in status:
... if status[item] == "filled":
... print(item)
...
apple
banana
Could it be that you just confused dict keys with dict values?
This fixed it, thank you! I did think a dictionary was right; I never
considered swapping the keys with the values, though. A simple 'fix, but it
worked. You've been a great help.
That's good to hear.
Would you please read and digest this
https://wiki.python.org/moin/GoogleGroupsPython if you need to post
again, a quick glance above will soon tell you why :)
--
Roses are red,
Violets are blue,
Most poems rhyme,
But this one doesn't.
Mark Lawrence
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