PLY (Python Lex-Yacc)

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  PLY (Python Lex-Yacc)                   Version 3.4

  Copyright (C) 2001-2011,
  David M. Beazley (Dabeaz LLC)
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
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  * Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.
  * Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.
  * Neither the name of the David Beazley or Dabeaz LLC may be used to
    endorse or promote products derived from this software without
    specific prior written permission.

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