Re: ConfigParser.items sorting

On Oct 29, 9:05 am, Jon Clements <jon...@xxxxxxxxxxxxxx> wrote:
On 28 Oct, 21:55, Dean McClure <bratpri...@xxxxxxxxx> wrote:





On Oct 28, 4:50 pm, Jon Clements <jon...@xxxxxxxxxxxxxx> wrote:

On 28 Oct, 06:21, Dean McClure <bratpri...@xxxxxxxxx> wrote:

Hi,

Just wondering how I can get theitems() command fromConfigParserto
not resort all the item pairs that it presents.

I am trying to get it to read some data in order:

[Relay Info]
relay_name: IPC
relay_current_range: [60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100,
104, 108, 112, 116]
relay_current_mutliplier: [1/8, 1/4, 1/2, 1, 2, 4]
relay_i: arcfc/(relay_current_range*relay_current_mutliplier)

so I can input the data and then eval() the equation at the end but
when I go
config.items('Relay Info')
It mixes everything up, is there a way to stop this?

Here is my selection code

variables = sorted(config.items('Relay Info'))
#Get inputs from user for each variable
for variable in variables:
        if variable[0] == 'relay_name':
                vars()[variable[0]] = variable[1]
        else:
                vars()[variable[0]] = 'not a real thing this is just a fake that
will never turn up to establish the variable'
                if variable[1][0] == '[' and variable[1][-1] == ']':
                        if variable[0] != 'Any':
                                while (variable[1].count(vars()[variable[0]]) < 1):
                                        vars()[variable[0]] = raw_input(str(variable)[1:-1] + "\n")
                                        if variable[1].count(vars()[variable[0]]) < 1:
                                                print 'Setting unavailable'
                        else:
                                vars()[variable[0]] = raw_input(str(variable)[1:-1] + "\n")
                else:
                        vars()[variable[0]] = variable[1]
                vars()[variable[0]] = float(eval(vars()[variable[0]]))

Thanks for the help!

I'm not 100% sure what you're asking, as why should the order be
important?

It's probably worth mentioning that the builtin dictionary type is
'unordered' as it uses hashing to store keys. However, theConfigParsermodule does allow you to supply a dict_type parameter in
version 2.6+ [http://docs.python.org/library/configparser.html], so
you could provide an 'ordered dictionary' which returns itsitemsin
insertion order. There's lots of recipes out there for those, but I
believe Raymond Hettinger has a fairly good one on the ActiveState(?)
cookbook site. (Google for python cookbook).

Since however, the idea of processing INI files is that you *know*
what you're looking for and how to interpret it, I'm not sure why
you're not using something similar to this (v2.6.2):

relay_name = config.get('Relay Info', 'relay_name')
relay_current_range = config.get('Relay Info', 'relay_current_range')
relay_current_range_list = eval(relay_current_range)

...etc...

hth,

Jon.

Sorry, basically I was just usingconfigparserto pull sets of
variables and equations to calculate the clearing time of a circuit
breaker. As each device is slightly different and I like the structure
of theconfigparserI decided it'd be an acceptable way to do this.
The thing is that I wanted to have the relay settings in the first
section, then have sections for different protection settings, all of
these have a few input parameters and an output for clearing time. The
user will select the config file for the relay they want and therefore
not all the settings will be the same, I know this isn't the intended
use of theconfigparserbut I thought it'd be much easier for people
to run from their hdd, just a folder of conf files that can be edited
or expanded on with relative ease.

In order to accommodate for all the different configurations I thought
I would have (as my code was showing but poorly explained) the
variable name in the config file (these will be standardised to a
degree) set to be either a set value or a selectable range in which
the program will ask the user to select a value from the range. One
relay may have a value for overload that is a percentage of the CT
value while others may have a selected full load current which is used
for everything so having all the input variables and then the equation
to output the clearing time means that I can ask for the input values
and evaluate the equation. Or at least I would be able to if I could
output them in order?

As Steven has already said, you're lone to an injection attack, don't
allow it.

What language do you orig. come from? ie, what would you say is your
'strongest' language.

Jon.

Probably C, I'm not used to having so many functions :( I have a
terrible tendency to build from the bottom and then stumble upon a
function that does it all for me. Always ends in tears
.

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