On 28/09/2021 10.53, Stefan Ram wrote:
"Michael F. Stemper" <michael.stem...@gmail.com> writes:
Well, I could continue to hard-code the data into one of the test
programs
One can employ a gradual path from a program with hardcoded
data to an entity sharable by different programs.
When I am hurried to rush to a working program, I often
end up with code that contains configuration data spread
(interspersed) all over the code. For example:
1st step: give a name to all the config data:
2nd: move all config data to the top of the source code,
directly after all the import statements:
3rd: move all config data to a separate "config.py" module:
import ...
import config
...
...
open( config.project_directory + "data.txt" )
...
but that would mean that every time that I wanted to look
at a different scenario, I'd need to modify a program.
Now you just have to modify "config.py" - clearly separated
from the (rest of the) "program".
Well, that doesn't really address what format to store the data
in. I was going to write a module that would read data from an
XML file:
import EDXML
gens = EDXML.GeneratorsFromXML( "gendata1.xml" )
fuels = EDXML.FuelsFromXML( "fueldata3.xml" )
(Of course, I'd really get the file names from command-line arguments.)
Then I read a web page that suggested use of XML was a poor idea,
so I posted here asking for a clarification and alternate suggestions.
One suggestion was that I use YAML, in which case, I'd write:
import EDfromYAML
gens = EDfromYAML( "gendata1.yaml" )
fuels = EDXML.FuelsFromYAML( "fueldata3.yaml" )
And when I discover anomalous behavior, I'd need to copy the
hard-coded data into another program.
Now you just have to import "config.py" from the other program.
This sounds like a suggestion that I hard-code the data into a
module. I suppose that I could have half-a-dozen modules with
different data sets and ln them as required:
$ rm GenData.py* FuelData.py*
$ ln gendata1.py GenData.py
$ ln fueldata3.py FuelData.py
It seems to me that a more thorough separation of code and data
might be useful.
--
Michael F. Stemper
The name of the story is "A Sound of Thunder".
It was written by Ray Bradbury. You're welcome.
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