Leif and I had a discussion about this on #sagemath in October, but never
brought it to sage-devel for some reason. Linked here as it may be
relevant: http://boxen.math.washington.edu/home/keshav/files/irclog-var.txt
Basically, if we are already encouraging the syntax "var('x')" instead of
"x = var('x')" (and William's post above seems to corroborate this), why
not go even further and create something that actually looks like a type
declaration with a statement, rather than a function, for example "symbolic
x"? Compare to the "local x" and "global x" which already exist in plain
Python. "symbolic x" would just be preparsed to "x = SR.var('x')", or
similar. This seems to me much nicer and more Pythonic than messing around
with globals. And for deprecation we could also preparse "^var\([^)]*\)$"
to "symbolic whatever".
Nils Bruin wrote:
>For Keshav and injecting in "local" scope: Indeed, local scope is non-
>injectable. "global" scope varies, though: each module ("imported
>file") has its own globals dictionary.
I see, thanks.
-Keshav
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