1 :mod:`symbol` --- Constants used with Python parse trees 2 ======================================================== 3 4 .. module:: symbol 5 :synopsis: Constants representing internal nodes of the parse tree. 6 7 .. sectionauthor:: Fred L. Drake, Jr. <fdrake (a] acm.org> 8 9 **Source code:** :source:`Lib/symbol.py` 10 11 -------------- 12 13 This module provides constants which represent the numeric values of internal 14 nodes of the parse tree. Unlike most Python constants, these use lower-case 15 names. Refer to the file :file:`Grammar/Grammar` in the Python distribution for 16 the definitions of the names in the context of the language grammar. The 17 specific numeric values which the names map to may change between Python 18 versions. 19 20 This module also provides one additional data object: 21 22 23 .. data:: sym_name 24 25 Dictionary mapping the numeric values of the constants defined in this module 26 back to name strings, allowing more human-readable representation of parse trees 27 to be generated. 28
