32.5. "token" — Constants used with Python parse trees ****************************************************** **Source code:** 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 "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. token.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. token.ISTERMINAL(x) Return true for terminal token values. token.ISNONTERMINAL(x) Return true for non-terminal token values. token.ISEOF(x) Return true if *x* is the marker indicating the end of input. The token constants are: token.ENDMARKER token.NAME token.NUMBER token.STRING token.NEWLINE token.INDENT token.DEDENT token.LPAR token.RPAR token.LSQB token.RSQB token.COLON token.COMMA token.SEMI token.PLUS token.MINUS token.STAR token.SLASH token.VBAR token.AMPER token.LESS token.GREATER token.EQUAL token.DOT token.PERCENT token.BACKQUOTE token.LBRACE token.RBRACE token.EQEQUAL token.NOTEQUAL token.LESSEQUAL token.GREATEREQUAL token.TILDE token.CIRCUMFLEX token.LEFTSHIFT token.RIGHTSHIFT token.DOUBLESTAR token.PLUSEQUAL token.MINEQUAL token.STAREQUAL token.SLASHEQUAL token.PERCENTEQUAL token.AMPEREQUAL token.VBAREQUAL token.CIRCUMFLEXEQUAL token.LEFTSHIFTEQUAL token.RIGHTSHIFTEQUAL token.DOUBLESTAREQUAL token.DOUBLESLASH token.DOUBLESLASHEQUAL token.AT token.OP token.ERRORTOKEN token.N_TOKENS token.NT_OFFSET See also: Module "parser" The second example for the "parser" module shows how to use the "symbol" module.