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我想知道如何定义inf和-inf作为intPython 2.7.我想,似乎inf并-inf只能作为一个工作float.

a = float('-inf') # works
b = float('inf') # works

c = int('-inf') # compile error, ValueError: invalid literal for int() with base 10: 'inf'
d = int('inf') # compile error, ValueError: invalid literal for int() with base 10: 'inf'