Alan Gauld wrote:
As an aside, I did try to create a lambda based solution but was unable. Let me know what's wrong:
ftable = { 'a' : lambda: print 'a', SyntaxError: invalid syntax
I did say "if Python had *proper* lambdas..."
Unfortunately Python insists on only having *expressions* as lambdas and since print is a command not a function you can't use it in Python lambdas! Dumb or what??!
So you are stuck with predefining a bunch of one liner functions and then creating a dictionary or going back to if/elif chains, which is where we came in... :-)
Well, in this particular case, if one really wants to use lambdas then one could (after importing sys, of course) replace the print statement with a call to sys.stdout.write() --
ftable = { 'a': lambda: sys.stdout.write('a\n'), ... }Note that sys.stdout.write() will *not* automatically add the newline that print does (which is why I've specified it in the above sample). Indeed, print can do all sorts of odd things with whitespace, leaving sys.stdout.write() as the best way to have real control over your output anyhow...
Jeff Shannon Technician/Programmer Credit International
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