32.6. "keyword" --- 检验Python关键字
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**源码：** Lib/keyword.py

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This module allows a Python program to determine if a string is a
keyword.

keyword.iskeyword(s)

   Return true if *s* is a Python keyword.

keyword.kwlist

   Sequence containing all the keywords defined for the interpreter.
   If any keywords are defined to only be active when particular
   "__future__" statements are in effect, these will be included as
   well.
