Edit File: token.txt
:mod:`token` --- Constants used with Python parse trees ======================================================= .. module:: token :synopsis: Constants representing terminal nodes of the parse tree. .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org> **Source code:** :source:`Lib/token.py` -------------- This module provides constants which represent the numeric values of leaf nodes of the parse tree (terminal tokens). Refer to the file :file:`Grammar/Grammar` in the Python distribution for the definitions of the names in the context of the language grammar. The specific numeric values which the names map to may change between Python versions. The module also provides a mapping from numeric codes to names and some functions. The functions mirror definitions in the Python C header files. .. data:: tok_name Dictionary mapping the numeric values of the constants defined in this module back to name strings, allowing more human-readable representation of parse trees to be generated. .. function:: ISTERMINAL(x) Return true for terminal token values. .. function:: ISNONTERMINAL(x) Return true for non-terminal token values. .. function:: ISEOF(x) Return true if *x* is the marker indicating the end of input. The token constants are: .. data:: ENDMARKER NAME NUMBER STRING NEWLINE INDENT DEDENT LPAR RPAR LSQB RSQB COLON COMMA SEMI PLUS MINUS STAR SLASH VBAR AMPER LESS GREATER EQUAL DOT PERCENT BACKQUOTE LBRACE RBRACE EQEQUAL NOTEQUAL LESSEQUAL GREATEREQUAL TILDE CIRCUMFLEX LEFTSHIFT RIGHTSHIFT DOUBLESTAR PLUSEQUAL MINEQUAL STAREQUAL SLASHEQUAL PERCENTEQUAL AMPEREQUAL VBAREQUAL CIRCUMFLEXEQUAL LEFTSHIFTEQUAL RIGHTSHIFTEQUAL DOUBLESTAREQUAL DOUBLESLASH DOUBLESLASHEQUAL AT OP ERRORTOKEN N_TOKENS NT_OFFSET .. seealso:: Module :mod:`parser` The second example for the :mod:`parser` module shows how to use the :mod:`symbol` module.