8000 Add _pyrepl (#5540) · RustPython/RustPython@d96374f · GitHub
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arihant2matharihant2math
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Add _pyrepl (#5540)
--------- Signed-off-by: Ashwin Naren <arihant2math@gmail.com>
1 parent 02533ac commit d96374f

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‎.cspell.dict/python-more.txt

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asyncgen
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athrow
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backslashreplace
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baserepl
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basicsize
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bdfl
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bigcharset

‎Lib/_pyrepl/__init__.py

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# Copyright 2000-2008 Michael Hudson-Doyle <micahel@gmail.com>
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# Armin Rigo
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#
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# All Rights Reserved
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#
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#
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# Permission to use, copy, modify, and distribute this software and
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# its documentation for any purpose is hereby granted without fee,
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# provided that the above copyright notice appear in all copies and
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# that both that copyright notice and this permission notice appear in
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# supporting documentation.
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#
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# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
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# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
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# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

‎Lib/_pyrepl/__main__.py

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# Important: don't add things to this module, as they will end up in the REPL's
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# default globals. Use _pyrepl.main instead.
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if __name__ == "__main__":
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from .main import interactive_console as __pyrepl_interactive_console
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__pyrepl_interactive_console()

‎Lib/_pyrepl/_minimal_curses.py

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"""Minimal '_curses' module, the low-level interface for curses module
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which is not meant to be used directly.
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Based on ctypes. It's too incomplete to be really called '_curses', so
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to use it, you have to import it and stick it in sys.modules['_curses']
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manually.
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Note that there is also a built-in module _minimal_curses which will
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hide this one if compiled in.
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"""
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import ctypes
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import ctypes.util
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class error(Exception):
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pass
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def _find_clib() -> str:
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trylibs = ["ncursesw", "ncurses", "curses"]
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for lib in trylibs:
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path = ctypes.util.find_library(lib)
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if path:
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return path
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raise ModuleNotFoundError("curses library not found", name="_pyrepl._minimal_curses")
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_clibpath = _find_clib()
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clib = ctypes.cdll.LoadLibrary(_clibpath)
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clib.setupterm.argtypes = [ctypes.c_char_p, ctypes.c_int, ctypes.POINTER(ctypes.c_int)]
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clib.setupterm.restype = ctypes.c_int
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clib.tigetstr.argtypes = [ctypes.c_char_p]
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clib.tigetstr.restype = ctypes.c_ssize_t
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clib.tparm.argtypes = [ctypes.c_char_p] + 9 * [ctypes.c_int] # type: ignore[operator]
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clib.tparm.restype = ctypes.c_char_p
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OK = 0
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ERR = -1
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# ____________________________________________________________
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def setupterm(termstr, fd):
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err = ctypes.c_int(0)
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result = clib.setupterm(termstr, fd, ctypes.byref(err))
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if result == ERR:
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raise error("setupterm() failed (err=%d)" % err.value)
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def tigetstr(cap):
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if not isinstance(cap, bytes):
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cap = cap.encode("ascii")
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result = clib.tigetstr(cap)
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if result == ERR:
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return None
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return ctypes.cast(result, ctypes.c_char_p).value
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def tparm(str, i1=0, i2=0, i3=0, i4=0, i5=0, i6=0, i7=0, i8=0, i9=0):
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result = clib.tparm(str, i1, i2, i3, i4, i5, i6, i7, i8, i9)
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if result is None:
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raise error("tparm() returned NULL")
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return result

‎Lib/_pyrepl/_threading_handler.py

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from __future__ import annotations
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from dataclasses import dataclass, field
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import traceback
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TYPE_CHECKING = False
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if TYPE_CHECKING:
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from threading import Thread
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from types import TracebackType
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from typing import Protocol
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class ExceptHookArgs(Protocol):
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@property
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def exc_type(self) -> type[BaseException]: ...
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@property
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def exc_value(self) -> BaseException | None: ...
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@property
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def exc_traceback(self) -> TracebackType | None: ...
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@property
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def thread(self) -> Thread | None: ...
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class ShowExceptions(Protocol):
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def __call__(self) -> int: ...
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def add(self, s: str) -> None: ...
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from .reader import Reader
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def install_threading_hook(reader: Reader) -> None:
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import threading
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@dataclass
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class ExceptHookHandler:
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lock: threading.Lock = field(default_factory=threading.Lock)
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messages: list[str] = field(default_factory=list)
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def show(self) -> int:
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count = 0
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with self.lock:
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if not self.messages:
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return 0
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reader.restore()
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for tb in self.messages:
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count += 1
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if tb:
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print(tb)
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self.messages.clear()
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reader.scheduled_commands.append("ctrl-c")
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reader.prepare()
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return count
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def add(self, s: str) -> None:
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with self.lock:
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self.messages.append(s)
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def exception(self, args: ExceptHookArgs) -> None:
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lines = traceback.format_exception(
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args.exc_type,
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args.exc_value,
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args.exc_traceback,
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colorize=reader.can_colorize,
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) # type: ignore[call-overload]
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pre = f"\nException in {args.thread.name}:\n" if args.thread else "\n"
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tb = pre + "".join(lines)
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self.add(tb)
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def __call__(self) -> int:
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return self.show()
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handler = ExceptHookHandler()
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reader.threading_hook = handler
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threading.excepthook = handler.exception

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