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source/c03/p07_infinity_and_nan.rst
@@ -81,7 +81,7 @@ NaN值会在所有操作中传播,而不会产生异常。比如:
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nan
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>>>
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-NaN值的一个特别的地方时它们之间的比较操作总是返回False。比如:
+NaN值的一个特别的地方是它们之间的比较操作总是返回False。比如:
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.. code-block:: python
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