On 24/04/13 00:14, Albert-Jan Roskam wrote:
Hello,
Is there a better, *built-in* alternative for the code below? The recursion
works,
but it feels like reinventing the wheel.
What makes you think it is reinventing the wheel? The following looks like a
perfectly sensible use for recursion. If your replacement strings themselves
contain $-template strings, and you want to replace them as well, recursion
seems like a good call.
Although, of course, the recursion may not converge on a single result.
Consider what happens if you use the following replacement strings:
$spam -> $eggs
$eggs -> $spam
import string
def translate(template, *args):
"""Recursively $-substitute <template> using <args> as a replacement"""
syntax = string.Template(template).substitute(*args)
if "$" in syntax:
return translate(syntax, *args)
return syntax
template = """\
Monty $surname
$more
"""
more = """\
The quest for the holy $grail
"""
surname="Python"
grail="Grail"
print translate(template, locals())
--
Steven
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