Pointers to variables
Evan Simpson
evan at tokenexchange.com
Thu Apr 22 13:52:51 EDT 1999
Randall Hopper wrote in message <19990422121403.A279051 at vislab.epa.gov>...
[snip]
> How can I cause a reference to the variables to be stored in the tuples
instead of their values?
You can't, or at least not directly. What you *can* do, in the case you
provided, is something like this:
for ( attrname, k ) in [( 'min', 'min_units' ), ( 'max', 'max_units' )]:
if cnf.has_key( k ):
setattr(self, attrname, cnf[ str ])
del cnf[ str ]
Python simply doesn't *have* variables in the sense you're thinking of, with
the exception of function-local variables. Instead it has namespaces, such
as modules, classes, and instances. These can be usefully be thought of as
dictionaries with efficient string-only keys, and can be manipulated as such
using getattr, setattr, delattr, etc.
Function-local-variables-are-a-whole-nother-alien-world-ly yrs,
Evan Simpson
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