token — Constants used with Python parse trees

소스 코드: Lib/token.py

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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.

이 모듈은 숫자 코드에서 이름으로의 매핑과 몇몇 함수도 제공합니다. 이 함수는 파이썬 C 헤더 파일의 정의를 반영합니다.

Note that a token’s value may depend on tokenizer options. For example, a "+" token may be reported as either PLUS or OP, or a "match" token may be either NAME or SOFT_KEYWORD.

token.tok_name

이 모듈에 정의된 상수의 숫자 값을 다시 이름 문자열로 매핑하여 사람이 읽을 수 있는 구문 분석 트리 표현을 생성할 수 있도록 하는 딕셔너리.

token.ISTERMINAL(x)

터미널 토큰값이면 True를 반환합니다.

token.ISNONTERMINAL(x)

비 터미널 토큰값이면 True를 반환합니다.

token.ISEOF(x)

x가 입력의 마지막을 나타내는 표시면 True를 반환합니다.

토큰 상수는 다음과 같습니다:

token.NAME

Token value that indicates an identifier. Note that keywords are also initially tokenized an NAME tokens.

token.NUMBER

Token value that indicates a numeric literal

token.STRING

Token value that indicates a string or byte literal, excluding formatted string literals. The token string is not interpreted: it includes the surrounding quotation marks and the prefix (if given); backslashes are included literally, without processing escape sequences.

token.OP

A generic token value that indicates an operator or delimiter.

CPython 구현 상세: This value is only reported by the tokenize module. Internally, the tokenizer uses exact token types instead.

token.COMMENT

Token value used to indicate a comment. The parser ignores COMMENT tokens.

token.NEWLINE

Token value that indicates the end of a logical line.

token.NL

Token value used to indicate a non-terminating newline. NL tokens are generated when a logical line of code is continued over multiple physical lines. The parser ignores NL tokens.

token.INDENT

Token value used at the beginning of a logical line to indicate the start of an indented block.

token.DEDENT

Token value used at the beginning of a logical line to indicate the end of an indented block.

token.FSTRING_START

Token value used to indicate the beginning of an f-string literal.

CPython 구현 상세: The token string includes the prefix and the opening quote(s), but none of the contents of the literal.

token.FSTRING_MIDDLE

Token value used for literal text inside an f-string literal, including format specifications.

CPython 구현 상세: Replacement fields (that is, the non-literal parts of f-strings) use the same tokens as other expressions, and are delimited by LBRACE, RBRACE, EXCLAMATION and COLON tokens.

token.FSTRING_END

Token value used to indicate the end of a f-string.

CPython 구현 상세: The token string contains the closing quote(s).

token.ENDMARKER

Token value that indicates the end of input.

token.ENCODING

소스 바이트열을 텍스트로 디코딩하는 데 사용되는 인코딩을 나타내는 토큰값. tokenize.tokenize()에 의해 반환되는 첫 번째 토큰은 항상 ENCODING 토큰입니다.

CPython 구현 상세: This token type isn’t used by the C tokenizer but is needed for the tokenize module.

The following token types are not produced by the tokenize module, and are defined for special uses in the tokenizer or parser:

token.TYPE_IGNORE

Token value indicating that a type: ignore comment was recognized. Such tokens are produced instead of regular COMMENT tokens only with the PyCF_TYPE_COMMENTS flag.

token.TYPE_COMMENT

Token value indicating that a type comment was recognized. Such tokens are produced instead of regular COMMENT tokens only with the PyCF_TYPE_COMMENTS flag.

token.SOFT_KEYWORD

Token value indicating a soft keyword.

The tokenizer never produces this value. To check for a soft keyword, pass a NAME token’s string to keyword.issoftkeyword().

token.ERRORTOKEN

Token value used to indicate wrong input.

The tokenize module generally indicates errors by raising exceptions instead of emitting this token. It can also emit tokens such as OP or NAME with strings that are later rejected by the parser.

The remaining tokens represent specific operators and delimiters. (The tokenize module reports these as OP; see exact_type in the tokenize documentation for details.)

Token	Value
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.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.ATEQUAL	"@="
token.RARROW	"->"
token.ELLIPSIS	"..."
token.COLONEQUAL	":="
token.EXCLAMATION	"!"

The following non-token constants are provided:

token.N_TOKENS

The number of token types defined in this module.

token.EXACT_TOKEN_TYPES

A dictionary mapping the string representation of a token to its numeric code.

Added in version 3.8.

버전 3.5에서 변경: Added AWAIT and ASYNC tokens.

버전 3.7에서 변경: COMMENT, NL 및 ENCODING 토큰이 추가되었습니다.

버전 3.7에서 변경: Removed AWAIT and ASYNC tokens. “async” and “await” are now tokenized as NAME tokens.

버전 3.8에서 변경: 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).

버전 3.12에서 변경: Added EXCLAMATION.

버전 3.13에서 변경: Removed AWAIT and ASYNC tokens again.