"token" — Constants used with Python parse trees
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**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/Tokens" 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 value for ""("".

token.RPAR

   Token value for "")"".

token.LSQB

   Token value for ""["".

token.RSQB

   Token value for ""]"".

token.COLON

   Token value for "":"".

token.COMMA

   Token value for "","".

token.SEMI

   Token value for "";"".

token.PLUS

   Token value for ""+"".

token.MINUS

   Token value for ""-"".

token.STAR

   Token value for ""*"".

token.SLASH

   Token value for ""/"".

token.VBAR

   Token value for ""|"".

token.AMPER

   Token value for ""&"".

token.LESS

   Token value for ""<"".

token.GREATER

   Token value for "">"".

token.EQUAL

   Token value for ""="".

token.DOT

   Token value for ""."".

token.PERCENT

   Token value for ""%"".

token.LBRACE

   Token value for ""{"".

token.RBRACE

   Token value for ""}"".

token.EQEQUAL

   Token value for ""=="".

token.NOTEQUAL

   Token value for ""!="".

token.LESSEQUAL

   Token value for ""<="".

token.GREATEREQUAL

   Token value for "">="".

token.TILDE

   Token value for ""~"".

token.CIRCUMFLEX

   Token value for ""^"".

token.LEFTSHIFT

   Token value for ""<<"".

token.RIGHTSHIFT

   Token value for "">>"".

token.DOUBLESTAR

   Token value for ""**"".

token.PLUSEQUAL

   Token value for ""+="".

token.MINEQUAL

   Token value for ""-="".

token.STAREQUAL

   Token value for ""*="".

token.SLASHEQUAL

   Token value for ""/="".

token.PERCENTEQUAL

   Token value for ""%="".

token.AMPEREQUAL

   Token value for ""&="".

token.VBAREQUAL

   Token value for ""|="".

token.CIRCUMFLEXEQUAL

   Token value for ""^="".

token.LEFTSHIFTEQUAL

   Token value for ""<<="".

token.RIGHTSHIFTEQUAL

   Token value for "">>="".

token.DOUBLESTAREQUAL

   Token value for ""**="".

token.DOUBLESLASH

   Token value for ""//"".

token.DOUBLESLASHEQUAL

   Token value for ""//="".

token.AT

   Token value for ""@"".

token.ATEQUAL

   Token value for ""@="".

token.RARROW

   Token value for ""->"".

token.ELLIPSIS

   Token value for ""..."".

token.COLONEQUAL

   Token value for "":="".

token.OP

token.AWAIT

token.ASYNC

token.TYPE_IGNORE

token.TYPE_COMMENT

token.SOFT_KEYWORD

token.ERRORTOKEN

token.N_TOKENS

token.NT_OFFSET

The following token type values aren’t used by the C tokenizer but are
needed for the "tokenize" module.

token.COMMENT

   Token value used to indicate a comment.

token.NL

   Token value used to indicate a non-terminating newline.  The
   "NEWLINE" token indicates the end of a logical line of Python code;
   "NL" tokens are generated when a logical line of code is continued
   over multiple physical lines.

token.ENCODING

   Token value that indicates the encoding used to decode the source
   bytes into text. The first token returned by "tokenize.tokenize()"
   will always be an "ENCODING" token.

token.TYPE_COMMENT

   Token value indicating that a type comment was recognized.  Such
   tokens are only produced when "ast.parse()" is invoked with
   "type_comments=True".

Changed in version 3.5: Added "AWAIT" and "ASYNC" tokens.

Changed in version 3.7: Added "COMMENT", "NL" and "ENCODING" tokens.

Changed in version 3.7: Removed "AWAIT" and "ASYNC" tokens. “async”
and “await” are now tokenized as "NAME" tokens.

Changed in version 3.8: Added "TYPE_COMMENT", "TYPE_IGNORE",
"COLONEQUAL". Added "AWAIT" and "ASYNC" tokens back (they’re needed to
support parsing older Python versions for "ast.parse()" with
"feature_version" set to 6 or lower).
