Rune Strand wrote: >> those modules are already imported when Python gets to your code, so >> the only "overhead" you're saving is a little typing. > > I don't understand this. Could you please elaborate? - if sys or os > are not imported for any other causes how are they already imported?
because they are imported for Python's own purposes, together with lots of other stuff: > python Python 2.4.2 >>> import sys >>> sys.modules.keys() ['copy_reg', 'locale', '__main__', 'site', '__builtin__', 'encodings', 'os.path' , 'encodings.cp437', 'encodings.codecs', 'ntpath', 'UserDict', 'encodings.except ions', 'nt', 'stat', 'zipimport', 'warnings', 'encodings.types', '_codecs', 'enc odings.cp1252', 'sys', 'codecs', 'types', '_locale', 'signal', 'linecache', 'enc odings.aliases', 'exceptions', 'os'] (sys is a built-in module, btw, so the cost of importing that is always close to zero) > It may be lousy, but it requires no imports. And, as I said in the > answer to Steve, I _know_ there are many ways to achieve this, > including yours. But in your rush to pin-point lousy code, you didn't > read that, I suppose. you know, being clueless is one thing, but being both clueless and arrogant is not a good way to get anywhere. I suggest spending more time learning things (start with the language reference), and less time picking fights that leads no- where. </F> -- http://mail.python.org/mailman/listinfo/python-list