RE: Python: A Program I'd Love To Understand

Hi Richard,
I put the quotes in to see if Python would complain and it did. I wanted to see 
if I could understand the error message, and it made sense to me.

Thanks.

Jim

From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of R Dinger
Sent: Wednesday, June 22, 2011 3:46 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Python: A Program I'd Love To Understand

Hi Jim,

Is this a new thread?  Did you put quotes around one of your target values?  If 
so, then that value is no longer callable in the current program (the runner 
function), look at your stack trace for hints as to where it is blowing up.

If you are just tinkering around in the interpreter with a dictionary, I'm not 
clear on what is going on.

Using the interpreter is a great resource.  Be sure to use help(item) to get 
details on calling and so on.  Note you can get help on data structure 
functions like the dict 'keys' function by entering:
>>> help({}.keys)


Richard

----- Original Message -----
From: Homme, James<mailto:james.homme@xxxxxxxxxxxx>
To: programmingblind@xxxxxxxxxxxxx<mailto:programmingblind@xxxxxxxxxxxxx>
Sent: Wednesday, June 22, 2011 12:01 PM
Subject: RE: Python: A Program I'd Love To Understand

Hi Richard,
I am starting to be less timid about trying things out from the interpreter 
command prompt. I just changed my program and put single quotes around one of 
the dictionary values, and Python complained that the object wasn't callable.

Jim

From: 
programmingblind-bounce@xxxxxxxxxxxxx<mailto:programmingblind-bounce@xxxxxxxxxxxxx>
 [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of R Dinger
Sent: Wednesday, June 22, 2011 2:17 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: Python: A Program I'd Love To Understand

Jim,

Your dictionary entries are all of the form:
'key': target

Your keys must be immutable like a string, tuple, number and so forth.

Your target can be almost anything like a string, tuple, list, function and so 
forth.  Since your targets are not quoted, they are not strings.  In addition 
each target, like death, must have been defined previously in your current 
module or some module you have already imported.

HTH

Richard

The ----- Original Message -----
From: Homme, James<mailto:james.homme@xxxxxxxxxxxx>
To: programmingblind@xxxxxxxxxxxxx<mailto:programmingblind@xxxxxxxxxxxxx>
Sent: Wednesday, June 22, 2011 10:59 AM
Subject: Python: A Program I'd Love To Understand

Hi,
I have lots of questions about the current Python exercise I'm working on, so 
I'll just ask one at a time. Hope you have lots of patience.

First question. I think I should be getting a compiler error but I'm not. I 
thought I had to put some sort of quotes around this code after the commas. Why 
is this compiling OK?

ROOMS = { 'death': death,
  'princess_lives_here': princess_lives_here,
  'gold_koi_pond': gold_koi_pond,
  'big_iron_gate': big_iron_gate,
  'bear_with_sword': bear_with_sword
  }

Thanks.

Jim

Jim Homme,
Usability Services,
Phone: 412-544-1810.


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