Compound Assignment Operators ( +=, *=, etc...)
Tom Christiansen
tchrist at mox.perl.com
Thu Aug 19 22:44:43 EDT 1999
[courtesy cc of this posting mailed to cited author]
In comp.lang.python,
Timothy R Evans <tre17 at pc142.cosc.canterbury.ac.nz> writes:
:x = 5
:def foo():
: print x # works, prints 5
:def bar():
: x = 6 # works, but doesn't change the global
:def wibble():
: print x
: x = 6 # this fails with NameError
:
:Seems like a good behaviour as it stops you doing dumb things.
Perhaps it could give a better error message, pretty please? Sometimes
driving Python feels like driving Ken Thompson's car. It just keeps saying
"?" and you're expected to know what that means. :-(
--tom
PS: From an old joke about Ken's treatment of error messages in ed.
--
If I allowed "next $label" then I'd also have to allow "goto $label",
and I don't think you really want that... :-) [now works in perl5!]
--Larry Wall in <1991Mar11.230002.27271 at jpl-devvax.jpl.nasa.gov>
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