existence of a variable

[Skip Montanaro]

    Martin> What is the best way to determine existence of a variable in
    Martin> Python (I need to check if a variable is defined and if so,
    Martin> delete it)?

One option is

    try:
        del v
    except NameError:
        pass

Skip Montanaro | http://www.mojam.com/
skip at mojam.com | http://www.musi-cal.com/
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