[Python-Dev] scoping and list comprehensions (original) (raw)

Greg Ewing greg@cosc.canterbury.ac.nz
Thu, 31 May 2001 17:15:24 +1200 (NZST)

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scope: l = [i**2 for i in range(10)]

By analogy with C, the introducer of a new scope should simply be an unadorned colon:

: l = [i**2 for i in range(10)]

:-)

While this might be useful, it doesn't really address the issue raised, because we really need a new scope per listcomp (or maybe even each 'for' in the listcomp).

There's also the problem of how to export results from the scope, though perhaps the new nested scope stuff provides a solution to that.

Nope -- there's still no way to assign to any name in an intermediate scope. Something heretical, such as declarations, would be needed.

Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg@cosc.canterbury.ac.nz +--------------------------------------+