mirror of https://github.com/morpheus65535/bazarr
679 lines
25 KiB
Python
679 lines
25 KiB
Python
from __future__ import absolute_import
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import os
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import platform
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import sys
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from dataclasses import dataclass, field
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from traceback import walk_tb
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from types import ModuleType, TracebackType
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from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Type, Union
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from pygments.lexers import guess_lexer_for_filename
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from pygments.token import Comment, Keyword, Name, Number, Operator, String
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from pygments.token import Text as TextToken
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from pygments.token import Token
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from . import pretty
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from ._loop import loop_first, loop_last
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from .columns import Columns
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from .console import Console, ConsoleOptions, ConsoleRenderable, RenderResult, group
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from .constrain import Constrain
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from .highlighter import RegexHighlighter, ReprHighlighter
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from .panel import Panel
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from .scope import render_scope
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from .style import Style
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from .syntax import Syntax
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from .text import Text
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from .theme import Theme
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WINDOWS = platform.system() == "Windows"
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LOCALS_MAX_LENGTH = 10
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LOCALS_MAX_STRING = 80
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def install(
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*,
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console: Optional[Console] = None,
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width: Optional[int] = 100,
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extra_lines: int = 3,
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theme: Optional[str] = None,
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word_wrap: bool = False,
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show_locals: bool = False,
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indent_guides: bool = True,
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suppress: Iterable[Union[str, ModuleType]] = (),
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max_frames: int = 100,
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) -> Callable[[Type[BaseException], BaseException, Optional[TracebackType]], Any]:
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"""Install a rich traceback handler.
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Once installed, any tracebacks will be printed with syntax highlighting and rich formatting.
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Args:
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console (Optional[Console], optional): Console to write exception to. Default uses internal Console instance.
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width (Optional[int], optional): Width (in characters) of traceback. Defaults to 100.
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extra_lines (int, optional): Extra lines of code. Defaults to 3.
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theme (Optional[str], optional): Pygments theme to use in traceback. Defaults to ``None`` which will pick
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a theme appropriate for the platform.
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word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
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show_locals (bool, optional): Enable display of local variables. Defaults to False.
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indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True.
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suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
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Returns:
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Callable: The previous exception handler that was replaced.
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"""
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traceback_console = Console(file=sys.stderr) if console is None else console
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def excepthook(
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type_: Type[BaseException],
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value: BaseException,
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traceback: Optional[TracebackType],
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) -> None:
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traceback_console.print(
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Traceback.from_exception(
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type_,
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value,
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traceback,
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width=width,
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extra_lines=extra_lines,
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theme=theme,
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word_wrap=word_wrap,
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show_locals=show_locals,
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indent_guides=indent_guides,
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suppress=suppress,
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max_frames=max_frames,
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)
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)
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def ipy_excepthook_closure(ip: Any) -> None: # pragma: no cover
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tb_data = {} # store information about showtraceback call
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default_showtraceback = ip.showtraceback # keep reference of default traceback
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def ipy_show_traceback(*args: Any, **kwargs: Any) -> None:
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"""wrap the default ip.showtraceback to store info for ip._showtraceback"""
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nonlocal tb_data
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tb_data = kwargs
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default_showtraceback(*args, **kwargs)
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def ipy_display_traceback(
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*args: Any, is_syntax: bool = False, **kwargs: Any
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) -> None:
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"""Internally called traceback from ip._showtraceback"""
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nonlocal tb_data
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exc_tuple = ip._get_exc_info()
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# do not display trace on syntax error
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tb: Optional[TracebackType] = None if is_syntax else exc_tuple[2]
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# determine correct tb_offset
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compiled = tb_data.get("running_compiled_code", False)
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tb_offset = tb_data.get("tb_offset", 1 if compiled else 0)
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# remove ipython internal frames from trace with tb_offset
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for _ in range(tb_offset):
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if tb is None:
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break
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tb = tb.tb_next
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excepthook(exc_tuple[0], exc_tuple[1], tb)
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tb_data = {} # clear data upon usage
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# replace _showtraceback instead of showtraceback to allow ipython features such as debugging to work
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# this is also what the ipython docs recommends to modify when subclassing InteractiveShell
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ip._showtraceback = ipy_display_traceback
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# add wrapper to capture tb_data
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ip.showtraceback = ipy_show_traceback
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ip.showsyntaxerror = lambda *args, **kwargs: ipy_display_traceback(
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*args, is_syntax=True, **kwargs
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)
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try: # pragma: no cover
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# if within ipython, use customized traceback
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ip = get_ipython() # type: ignore
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ipy_excepthook_closure(ip)
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return sys.excepthook
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except Exception:
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# otherwise use default system hook
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old_excepthook = sys.excepthook
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sys.excepthook = excepthook
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return old_excepthook
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@dataclass
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class Frame:
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filename: str
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lineno: int
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name: str
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line: str = ""
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locals: Optional[Dict[str, pretty.Node]] = None
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@dataclass
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class _SyntaxError:
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offset: int
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filename: str
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line: str
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lineno: int
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msg: str
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@dataclass
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class Stack:
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exc_type: str
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exc_value: str
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syntax_error: Optional[_SyntaxError] = None
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is_cause: bool = False
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frames: List[Frame] = field(default_factory=list)
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@dataclass
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class Trace:
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stacks: List[Stack]
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class PathHighlighter(RegexHighlighter):
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highlights = [r"(?P<dim>.*/)(?P<bold>.+)"]
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class Traceback:
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"""A Console renderable that renders a traceback.
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Args:
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trace (Trace, optional): A `Trace` object produced from `extract`. Defaults to None, which uses
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the last exception.
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width (Optional[int], optional): Number of characters used to traceback. Defaults to 100.
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extra_lines (int, optional): Additional lines of code to render. Defaults to 3.
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theme (str, optional): Override pygments theme used in traceback.
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word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
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show_locals (bool, optional): Enable display of local variables. Defaults to False.
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indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True.
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locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
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Defaults to 10.
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locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
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suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
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max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100.
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"""
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LEXERS = {
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"": "text",
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".py": "python",
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".pxd": "cython",
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".pyx": "cython",
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".pxi": "pyrex",
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}
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def __init__(
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self,
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trace: Optional[Trace] = None,
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width: Optional[int] = 100,
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extra_lines: int = 3,
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theme: Optional[str] = None,
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word_wrap: bool = False,
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show_locals: bool = False,
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indent_guides: bool = True,
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locals_max_length: int = LOCALS_MAX_LENGTH,
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locals_max_string: int = LOCALS_MAX_STRING,
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suppress: Iterable[Union[str, ModuleType]] = (),
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max_frames: int = 100,
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):
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if trace is None:
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exc_type, exc_value, traceback = sys.exc_info()
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if exc_type is None or exc_value is None or traceback is None:
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raise ValueError(
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"Value for 'trace' required if not called in except: block"
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)
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trace = self.extract(
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exc_type, exc_value, traceback, show_locals=show_locals
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)
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self.trace = trace
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self.width = width
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self.extra_lines = extra_lines
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self.theme = Syntax.get_theme(theme or "ansi_dark")
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self.word_wrap = word_wrap
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self.show_locals = show_locals
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self.indent_guides = indent_guides
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self.locals_max_length = locals_max_length
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self.locals_max_string = locals_max_string
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self.suppress: Sequence[str] = []
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for suppress_entity in suppress:
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if not isinstance(suppress_entity, str):
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assert (
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suppress_entity.__file__ is not None
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), f"{suppress_entity!r} must be a module with '__file__' attribute"
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path = os.path.dirname(suppress_entity.__file__)
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else:
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path = suppress_entity
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path = os.path.normpath(os.path.abspath(path))
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self.suppress.append(path)
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self.max_frames = max(4, max_frames) if max_frames > 0 else 0
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@classmethod
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def from_exception(
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cls,
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exc_type: Type[Any],
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exc_value: BaseException,
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traceback: Optional[TracebackType],
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width: Optional[int] = 100,
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extra_lines: int = 3,
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theme: Optional[str] = None,
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word_wrap: bool = False,
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show_locals: bool = False,
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indent_guides: bool = True,
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locals_max_length: int = LOCALS_MAX_LENGTH,
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locals_max_string: int = LOCALS_MAX_STRING,
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suppress: Iterable[Union[str, ModuleType]] = (),
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max_frames: int = 100,
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) -> "Traceback":
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"""Create a traceback from exception info
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Args:
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exc_type (Type[BaseException]): Exception type.
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exc_value (BaseException): Exception value.
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traceback (TracebackType): Python Traceback object.
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width (Optional[int], optional): Number of characters used to traceback. Defaults to 100.
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extra_lines (int, optional): Additional lines of code to render. Defaults to 3.
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theme (str, optional): Override pygments theme used in traceback.
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word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
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show_locals (bool, optional): Enable display of local variables. Defaults to False.
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indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True.
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locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
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Defaults to 10.
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locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
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suppress (Iterable[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
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max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100.
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Returns:
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Traceback: A Traceback instance that may be printed.
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"""
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rich_traceback = cls.extract(
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exc_type, exc_value, traceback, show_locals=show_locals
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)
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return cls(
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rich_traceback,
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width=width,
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extra_lines=extra_lines,
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theme=theme,
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word_wrap=word_wrap,
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show_locals=show_locals,
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indent_guides=indent_guides,
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locals_max_length=locals_max_length,
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locals_max_string=locals_max_string,
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suppress=suppress,
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max_frames=max_frames,
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)
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@classmethod
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def extract(
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cls,
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exc_type: Type[BaseException],
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exc_value: BaseException,
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traceback: Optional[TracebackType],
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show_locals: bool = False,
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locals_max_length: int = LOCALS_MAX_LENGTH,
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locals_max_string: int = LOCALS_MAX_STRING,
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) -> Trace:
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"""Extract traceback information.
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Args:
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exc_type (Type[BaseException]): Exception type.
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exc_value (BaseException): Exception value.
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traceback (TracebackType): Python Traceback object.
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show_locals (bool, optional): Enable display of local variables. Defaults to False.
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locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
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Defaults to 10.
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locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
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Returns:
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Trace: A Trace instance which you can use to construct a `Traceback`.
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"""
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stacks: List[Stack] = []
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is_cause = False
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from rich import _IMPORT_CWD
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def safe_str(_object: Any) -> str:
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"""Don't allow exceptions from __str__ to propegate."""
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try:
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return str(_object)
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except Exception:
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return "<exception str() failed>"
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while True:
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stack = Stack(
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exc_type=safe_str(exc_type.__name__),
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exc_value=safe_str(exc_value),
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is_cause=is_cause,
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)
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if isinstance(exc_value, SyntaxError):
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stack.syntax_error = _SyntaxError(
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offset=exc_value.offset or 0,
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filename=exc_value.filename or "?",
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lineno=exc_value.lineno or 0,
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line=exc_value.text or "",
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msg=exc_value.msg,
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)
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stacks.append(stack)
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append = stack.frames.append
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for frame_summary, line_no in walk_tb(traceback):
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filename = frame_summary.f_code.co_filename
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if filename and not filename.startswith("<"):
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if not os.path.isabs(filename):
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filename = os.path.join(_IMPORT_CWD, filename)
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frame = Frame(
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filename=filename or "?",
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lineno=line_no,
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name=frame_summary.f_code.co_name,
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locals={
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key: pretty.traverse(
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value,
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max_length=locals_max_length,
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max_string=locals_max_string,
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)
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for key, value in frame_summary.f_locals.items()
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}
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if show_locals
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else None,
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)
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append(frame)
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if "_rich_traceback_guard" in frame_summary.f_locals:
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del stack.frames[:]
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cause = getattr(exc_value, "__cause__", None)
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if cause and cause.__traceback__:
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exc_type = cause.__class__
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exc_value = cause
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traceback = cause.__traceback__
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if traceback:
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is_cause = True
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continue
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cause = exc_value.__context__
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if (
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cause
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and cause.__traceback__
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and not getattr(exc_value, "__suppress_context__", False)
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):
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exc_type = cause.__class__
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exc_value = cause
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traceback = cause.__traceback__
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if traceback:
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is_cause = False
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continue
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# No cover, code is reached but coverage doesn't recognize it.
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break # pragma: no cover
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trace = Trace(stacks=stacks)
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return trace
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def __rich_console__(
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self, console: Console, options: ConsoleOptions
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) -> RenderResult:
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theme = self.theme
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background_style = theme.get_background_style()
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token_style = theme.get_style_for_token
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traceback_theme = Theme(
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{
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"pretty": token_style(TextToken),
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"pygments.text": token_style(Token),
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"pygments.string": token_style(String),
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"pygments.function": token_style(Name.Function),
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"pygments.number": token_style(Number),
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"repr.indent": token_style(Comment) + Style(dim=True),
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"repr.str": token_style(String),
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"repr.brace": token_style(TextToken) + Style(bold=True),
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"repr.number": token_style(Number),
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"repr.bool_true": token_style(Keyword.Constant),
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"repr.bool_false": token_style(Keyword.Constant),
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"repr.none": token_style(Keyword.Constant),
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"scope.border": token_style(String.Delimiter),
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"scope.equals": token_style(Operator),
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"scope.key": token_style(Name),
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"scope.key.special": token_style(Name.Constant) + Style(dim=True),
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},
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inherit=False,
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)
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highlighter = ReprHighlighter()
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for last, stack in loop_last(reversed(self.trace.stacks)):
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if stack.frames:
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stack_renderable: ConsoleRenderable = Panel(
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self._render_stack(stack),
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title="[traceback.title]Traceback [dim](most recent call last)",
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style=background_style,
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border_style="traceback.border",
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expand=True,
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padding=(0, 1),
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)
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stack_renderable = Constrain(stack_renderable, self.width)
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with console.use_theme(traceback_theme):
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yield stack_renderable
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if stack.syntax_error is not None:
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with console.use_theme(traceback_theme):
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yield Constrain(
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Panel(
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self._render_syntax_error(stack.syntax_error),
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style=background_style,
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border_style="traceback.border.syntax_error",
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expand=True,
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padding=(0, 1),
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width=self.width,
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),
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self.width,
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)
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yield Text.assemble(
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(f"{stack.exc_type}: ", "traceback.exc_type"),
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highlighter(stack.syntax_error.msg),
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)
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elif stack.exc_value:
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yield Text.assemble(
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(f"{stack.exc_type}: ", "traceback.exc_type"),
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highlighter(stack.exc_value),
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)
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else:
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yield Text.assemble((f"{stack.exc_type}", "traceback.exc_type"))
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if not last:
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if stack.is_cause:
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yield Text.from_markup(
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"\n[i]The above exception was the direct cause of the following exception:\n",
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)
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else:
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yield Text.from_markup(
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"\n[i]During handling of the above exception, another exception occurred:\n",
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)
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@group()
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def _render_syntax_error(self, syntax_error: _SyntaxError) -> RenderResult:
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highlighter = ReprHighlighter()
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path_highlighter = PathHighlighter()
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if syntax_error.filename != "<stdin>":
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text = Text.assemble(
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(f" {syntax_error.filename}", "pygments.string"),
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(":", "pygments.text"),
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(str(syntax_error.lineno), "pygments.number"),
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style="pygments.text",
|
|
)
|
|
yield path_highlighter(text)
|
|
syntax_error_text = highlighter(syntax_error.line.rstrip())
|
|
syntax_error_text.no_wrap = True
|
|
offset = min(syntax_error.offset - 1, len(syntax_error_text))
|
|
syntax_error_text.stylize("bold underline", offset, offset)
|
|
syntax_error_text += Text.from_markup(
|
|
"\n" + " " * offset + "[traceback.offset]▲[/]",
|
|
style="pygments.text",
|
|
)
|
|
yield syntax_error_text
|
|
|
|
@classmethod
|
|
def _guess_lexer(cls, filename: str, code: str) -> str:
|
|
ext = os.path.splitext(filename)[-1]
|
|
if not ext:
|
|
# No extension, look at first line to see if it is a hashbang
|
|
# Note, this is an educated guess and not a guarantee
|
|
# If it fails, the only downside is that the code is highlighted strangely
|
|
new_line_index = code.index("\n")
|
|
first_line = code[:new_line_index] if new_line_index != -1 else code
|
|
if first_line.startswith("#!") and "python" in first_line.lower():
|
|
return "python"
|
|
lexer_name = (
|
|
cls.LEXERS.get(ext) or guess_lexer_for_filename(filename, code).name
|
|
)
|
|
return lexer_name
|
|
|
|
@group()
|
|
def _render_stack(self, stack: Stack) -> RenderResult:
|
|
path_highlighter = PathHighlighter()
|
|
theme = self.theme
|
|
code_cache: Dict[str, str] = {}
|
|
|
|
def read_code(filename: str) -> str:
|
|
"""Read files, and cache results on filename.
|
|
|
|
Args:
|
|
filename (str): Filename to read
|
|
|
|
Returns:
|
|
str: Contents of file
|
|
"""
|
|
code = code_cache.get(filename)
|
|
if code is None:
|
|
with open(
|
|
filename, "rt", encoding="utf-8", errors="replace"
|
|
) as code_file:
|
|
code = code_file.read()
|
|
code_cache[filename] = code
|
|
return code
|
|
|
|
def render_locals(frame: Frame) -> Iterable[ConsoleRenderable]:
|
|
if frame.locals:
|
|
yield render_scope(
|
|
frame.locals,
|
|
title="locals",
|
|
indent_guides=self.indent_guides,
|
|
max_length=self.locals_max_length,
|
|
max_string=self.locals_max_string,
|
|
)
|
|
|
|
exclude_frames: Optional[range] = None
|
|
if self.max_frames != 0:
|
|
exclude_frames = range(
|
|
self.max_frames // 2,
|
|
len(stack.frames) - self.max_frames // 2,
|
|
)
|
|
|
|
excluded = False
|
|
for frame_index, frame in enumerate(stack.frames):
|
|
|
|
if exclude_frames and frame_index in exclude_frames:
|
|
excluded = True
|
|
continue
|
|
|
|
if excluded:
|
|
assert exclude_frames is not None
|
|
yield Text(
|
|
f"\n... {len(exclude_frames)} frames hidden ...",
|
|
justify="center",
|
|
style="traceback.error",
|
|
)
|
|
excluded = False
|
|
|
|
first = frame_index == 1
|
|
frame_filename = frame.filename
|
|
suppressed = any(frame_filename.startswith(path) for path in self.suppress)
|
|
|
|
text = Text.assemble(
|
|
path_highlighter(Text(frame.filename, style="pygments.string")),
|
|
(":", "pygments.text"),
|
|
(str(frame.lineno), "pygments.number"),
|
|
" in ",
|
|
(frame.name, "pygments.function"),
|
|
style="pygments.text",
|
|
)
|
|
if not frame.filename.startswith("<") and not first:
|
|
yield ""
|
|
yield text
|
|
if frame.filename.startswith("<"):
|
|
yield from render_locals(frame)
|
|
continue
|
|
if not suppressed:
|
|
try:
|
|
code = read_code(frame.filename)
|
|
lexer_name = self._guess_lexer(frame.filename, code)
|
|
syntax = Syntax(
|
|
code,
|
|
lexer_name,
|
|
theme=theme,
|
|
line_numbers=True,
|
|
line_range=(
|
|
frame.lineno - self.extra_lines,
|
|
frame.lineno + self.extra_lines,
|
|
),
|
|
highlight_lines={frame.lineno},
|
|
word_wrap=self.word_wrap,
|
|
code_width=88,
|
|
indent_guides=self.indent_guides,
|
|
dedent=False,
|
|
)
|
|
yield ""
|
|
except Exception as error:
|
|
yield Text.assemble(
|
|
(f"\n{error}", "traceback.error"),
|
|
)
|
|
else:
|
|
yield (
|
|
Columns(
|
|
[
|
|
syntax,
|
|
*render_locals(frame),
|
|
],
|
|
padding=1,
|
|
)
|
|
if frame.locals
|
|
else syntax
|
|
)
|
|
|
|
|
|
if __name__ == "__main__": # pragma: no cover
|
|
|
|
from .console import Console
|
|
|
|
console = Console()
|
|
import sys
|
|
|
|
def bar(a: Any) -> None: # 这是对亚洲语言支持的测试。面对模棱两可的想法，拒绝猜测的诱惑
|
|
one = 1
|
|
print(one / a)
|
|
|
|
def foo(a: Any) -> None:
|
|
_rich_traceback_guard = True
|
|
zed = {
|
|
"characters": {
|
|
"Paul Atreides",
|
|
"Vladimir Harkonnen",
|
|
"Thufir Hawat",
|
|
"Duncan Idaho",
|
|
},
|
|
"atomic_types": (None, False, True),
|
|
}
|
|
bar(a)
|
|
|
|
def error() -> None:
|
|
|
|
try:
|
|
try:
|
|
foo(0)
|
|
except:
|
|
slfkjsldkfj # type: ignore
|
|
except:
|
|
console.print_exception(show_locals=True)
|
|
|
|
error()
|