请问Python中如何判断一个变量是否已经定义了?
robinhood007
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1#
发表于 2007-01-08 10:22
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robinhood007
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1#
发表于 2007-01-08 10:22
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jacksun5
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2#
发表于 2007-01-08 12:10
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junsi
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3#
发表于 2007-01-08 14:03
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KaMakA
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4#
发表于 2007-01-22 18:39
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ragkk
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5#
发表于 2007-01-22 20:45
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