Handling sorted dictionaries

[loial]

The following code gives the error

d=sortedmachine s[machine]
TypeError: list indices must be integers


What works for the unsorted dictionary does not work for the sorted
dictionary.
Can anyone help?


machinekey = "111111"

machines = {}
machines[machinekey]=[1,0,0,0,0,0,0,0 ,0,0,0,0,0]

machinekey = "222222"

machines[machinekey]=[0,1,0,0,0,0,0,0 ,0,0,0,0,0]

ddd=0
for machine in machines.keys() :
d=machines[machine]
print machine
print d [ddd]

sortedmachines= sorted(machines )
for machine in sortedmachines:
d=sortedmachine s[machine]
print machine
print d [ddd]

[Steven D'Aprano]

Re: Handling sorted dictionaries

On Tue, 17 Apr 2007 01:01:55 -0700, loial wrote:

The following code gives the error
>
d=sortedmachine s[machine]
TypeError: list indices must be integers
>
>
What works for the unsorted dictionary does not work for the sorted
dictionary.
Can anyone help?

The error message you got tells you what the problem is. sortedmachines
is not a "sorted dictionary". There is no such thing -- dictionaries, also
known as "hash tables" in other languages, are unsorted. sortedmachines is
a _list_, just like the error message says, and the index must be an
integer.

sortedmachines= sorted(machines )

sortedmachines is now the sorted _keys_ copied from machines. Try calling
"print sortedmachines" and looking at what you get.

for machine in sortedmachines:
d=sortedmachine s[machine]

Try this instead:

d = machines[machine]


--
Steven D'Aprano

[filyph]

Re: Handling sorted dictionaries

Hello,

Dictionary items are inordered and can not be sorted. Function
sorted() returns list of tuples in each is 0. item key from dictionary
and 1. is value from key-value pair from dict machines. List indices
must be integers and machine keys are strings. See http://www.python.org/dev/peps/pep-0265/
about sorting dictionaries.
You need to know what type is variable in each line of code.
Dict is not same as list, even when you can get values from they very
similar way. dict[key] and list[index], key can be everything what can
be hashed, but index can be only integer.

I am not english, so I hope you understand me.

loial napísal(a):

The following code gives the error
d=sortedmachine s[machine]
TypeError: list indices must be integers
What works for the unsorted dictionary does not work for the sorted
dictionary.
Can anyone help?
machinekey = "111111"
machines = {}
machines[machinekey]=[1,0,0,0,0,0,0,0 ,0,0,0,0,0]
machinekey = "222222"
machines[machinekey]=[0,1,0,0,0,0,0,0 ,0,0,0,0,0]
ddd=0
for machine in machines.keys() :
d=machines[machine]
print machine
print d [ddd]
>
sortedmachines= sorted(machines )
for machine in sortedmachines:
d=sortedmachine s[machine]
print machine
print d [ddd]