Josiah Carlson <[EMAIL PROTECTED]> wrote: > Samuel wrote: >> On Sun, 17 Jun 2007 11:00:58 +0000, Duncan Booth wrote: >> >>> The elegant and lazy way would be to change your specification so >>> that $ characters are escaped by $$ not by backslashes. Then you can >>> write: >>> >>>>>> from string import Template >>>>>> ... >> >> Thanks, however, turns out my specification of the problem was >> incomplete: In addition, the variable names are not known at >> compilation time. > > You mean at edit-time. > > >>> t.substitute(variable1="hello", variable2="world") > > Can be replaced by... > > >>> t.substitute(**vars) > > ...as per the standard **kwargs passing semantics.
You don't even need to do that. substitute will accept a dictionary as a positional argument: t.substitute(vars) If you use both forms then the keyword arguments take priority. Also, of course, vars just needs to be something which quacks like a dict: it can do whatever it needs to do such as looking up a database or querying a server to generate the value only when it needs it, or even evaluating the name as an expression; in the OP's case it could call get_variable. Anyway, the question seems to be moot since the OP's definition of 'elegant and lazy' includes regular expressions and reinvented wheels. ... and in another message Graham Breed wrote: > def get_variable(varname): > return globals()[varname] Doesn't the mere thought of creating global variables with unknown names make you shudder? -- http://mail.python.org/mailman/listinfo/python-list
