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Closed as duplicate of#131189
Closed as duplicate of#131189
Description
Bug report
Bug description:
If CPython is built and deployed onto a POSIX system without curses, we get an error about importing msvcrt which is a Windows library and thus confusing
# python3random: python3: uninitialized urandom read (24 bytes read)Python 3.13.2 (main, Feb 12 2025, 13:57:13) [GCC 13.3.0] on linuxType "help", "copyright", "credits" or "license" for more information.warning: can't use pyrepl: No module named 'msvcrt'Here's the import log
# trying /usr/lib/python3.13/_pyrepl/__main__.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/__main__.abi3.so# trying /usr/lib/python3.13/_pyrepl/__main__.so# trying /usr/lib/python3.13/_pyrepl/__main__.py# trying /usr/lib/python3.13/_pyrepl/__main__.pyc# code object from '/usr/lib/python3.13/_pyrepl/__main__.pyc'# trying /usr/lib/python3.13/_pyrepl/main.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/main.abi3.so# trying /usr/lib/python3.13/_pyrepl/main.so# trying /usr/lib/python3.13/_pyrepl/main.py# trying /usr/lib/python3.13/_pyrepl/main.pyc# code object from '/usr/lib/python3.13/_pyrepl/main.pyc'# trying /usr/lib/python3.13/_pyrepl/simple_interact.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/simple_interact.abi3.so# trying /usr/lib/python3.13/_pyrepl/simple_interact.so# trying /usr/lib/python3.13/_pyrepl/simple_interact.py# trying /usr/lib/python3.13/_pyrepl/simple_interact.pyc# code object from '/usr/lib/python3.13/_pyrepl/simple_interact.pyc'# trying /usr/lib/python3.13/_pyrepl/readline.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/readline.abi3.so# trying /usr/lib/python3.13/_pyrepl/readline.so# trying /usr/lib/python3.13/_pyrepl/readline.py# trying /usr/lib/python3.13/_pyrepl/readline.pyc# code object from '/usr/lib/python3.13/_pyrepl/readline.pyc'# trying /usr/lib/python3.13/_pyrepl/unix_console.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/unix_console.abi3.so# trying /usr/lib/python3.13/_pyrepl/unix_console.so# trying /usr/lib/python3.13/_pyrepl/unix_console.py# trying /usr/lib/python3.13/_pyrepl/unix_console.pyc# code object from '/usr/lib/python3.13/_pyrepl/unix_console.pyc'# trying /usr/lib/python3.13/_pyrepl/curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/curses.abi3.so# trying /usr/lib/python3.13/_pyrepl/curses.so# trying /usr/lib/python3.13/_pyrepl/curses.py# trying /usr/lib/python3.13/_pyrepl/curses.pyc# code object from '/usr/lib/python3.13/_pyrepl/curses.pyc'# trying /root/_curses.cpython-313-arm-linux-gnueabi.so# trying /root/_curses.abi3.so# trying /root/_curses.so# trying /root/_curses.py# trying /root/_curses.pyc# trying /usr/lib/python3.13/_curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_curses.abi3.so# trying /usr/lib/python3.13/_curses.so# trying /usr/lib/python3.13/_curses.py# trying /usr/lib/python3.13/_curses.pyc# trying /usr/lib/python3.13/lib-dynload/_curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/lib-dynload/_curses.abi3.so# trying /usr/lib/python3.13/lib-dynload/_curses.so# trying /usr/lib/python3.13/lib-dynload/_curses.py# trying /usr/lib/python3.13/lib-dynload/_curses.pyc# trying /usr/lib/python3.13/site-packages/_curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/site-packages/_curses.abi3.so# trying /usr/lib/python3.13/site-packages/_curses.so# trying /usr/lib/python3.13/site-packages/_curses.py# trying /usr/lib/python3.13/site-packages/_curses.pyc# trying /root/curses.cpython-313-arm-linux-gnueabi.so# trying /root/curses.abi3.so# trying /root/curses.so# trying /root/curses.py# trying /root/curses.pyc# trying /usr/lib/python3.13/curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/curses.abi3.so# trying /usr/lib/python3.13/curses.so# trying /usr/lib/python3.13/curses.py# trying /usr/lib/python3.13/curses.pyc# trying /usr/lib/python3.13/lib-dynload/curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/lib-dynload/curses.abi3.so# trying /usr/lib/python3.13/lib-dynload/curses.so# trying /usr/lib/python3.13/lib-dynload/curses.py# trying /usr/lib/python3.13/lib-dynload/curses.pyc# trying /usr/lib/python3.13/site-packages/curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/site-packages/curses.abi3.so# trying /usr/lib/python3.13/site-packages/curses.so# trying /usr/lib/python3.13/site-packages/curses.py# trying /usr/lib/python3.13/site-packages/curses.pyc# trying /usr/lib/python3.13/_pyrepl/_minimal_curses.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/_minimal_curses.abi3.so# trying /usr/lib/python3.13/_pyrepl/_minimal_curses.so# trying /usr/lib/python3.13/_pyrepl/_minimal_curses.py# trying /usr/lib/python3.13/_pyrepl/_minimal_curses.pyc# code object from '/usr/lib/python3.13/_pyrepl/_minimal_curses.pyc'# destroy _pyrepl._minimal_curses# trying /usr/lib/python3.13/_pyrepl/windows_console.cpython-313-arm-linux-gnueabi.so# trying /usr/lib/python3.13/_pyrepl/windows_console.abi3.so# trying /usr/lib/python3.13/_pyrepl/windows_console.so# trying /usr/lib/python3.13/_pyrepl/windows_console.py# trying /usr/lib/python3.13/_pyrepl/windows_console.pyc# code object from '/usr/lib/python3.13/_pyrepl/windows_console.pyc'# trying /root/msvcrt.cpython-313-arm-linux-gnueabi.so# trying /root/msvcrt.abi3.so# trying /root/msvcrt.so# trying /root/msvcrt.py# trying /root/msvcrt.pycThe import checks are structured like so in _pyrepl/readline.py
try:from .unix_consoleimportUnixConsoleasConsole,_errorexceptImportError:from .windows_consoleimportWindowsConsoleasConsole,_error
Maybe this should be:
ifsys.platform=="win32":from .windows_consoleimportWindowsConsoleasConsole,_errorelse:from .unix_consoleimportUnixConsoleasConsole,_error
It's not clear to me if cygwin is expected to work with the windows console or the unix console.
Theregister_readline handler already has similar branching logic:
ifos.name=="nt":import_pyrepl.windows_consoleconsole_errors= (_pyrepl.windows_console._error,)else:import_pyrepl.unix_consoleconsole_errors=_pyrepl.unix_console._error
The restructured import should allow the correct import error to bubble up and setCAN_USE_PYREPL=False.
# python3 -c "import _pyrepl.curses" File "<string>", line 1, in <module> import _pyrepl.curses File "<frozen importlib._bootstrap>", line 1360, in _find_and_load File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 935, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 1026, in exec_module File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed File "/usr/lib/python3.13/_pyrepl/curses.py", line 28, in <module> from . import _minimal_curses as _curses # type: ignore[no-redef] File "<frozen importlib._bootstrap>", line 1415, in _handle_fromlist File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed File "<frozen importlib._bootstrap>", line 1360, in _find_and_load File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 935, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 1026, in exec_module File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed File "/usr/lib/python3.13/_pyrepl/_minimal_curses.py", line 32, in <module> _clibpath = _find_clib() File "/usr/lib/python3.13/_pyrepl/_minimal_curses.py", line 28, in _find_clib traceback.print_stack()Traceback (most recent call last): File "/usr/lib/python3.13/_pyrepl/curses.py", line 23, in <module> import _cursesModuleNotFoundError: No module named '_curses'During handling of the above exception, another exception occurred:Traceback (most recent call last): File "/usr/lib/python3.13/_pyrepl/curses.py", line 26, in <module> import curses as _curses # type: ignore[no-redef] ^^^^^^^^^^^^^^^^^^^^^^^^ModuleNotFoundError: No module named 'curses'During handling of the above exception, another exception occurred:Traceback (most recent call last): File "<string>", line 1, in <module> import _pyrepl.curses File "/usr/lib/python3.13/_pyrepl/curses.py", line 28, in <module> from . import _minimal_curses as _curses # type: ignore[no-redef] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ImportError: cannot import name '_minimal_curses' from '_pyrepl' (/usr/lib/python3.13/_pyrepl/__init__.py)TheModuleNotFoundError("curses library not found", name="_pyrepl._minimal_curses") is getting morphed into thatImportError above byfrom . import X.
def_find_clib()->str:trylibs= ["ncursesw","ncurses","curses"]forlibintrylibs:path=ctypes.util.find_library(lib)ifpath:returnpathraiseModuleNotFoundError("curses library not found",name="_pyrepl._minimal_curses")
Dropping the name property seems to resolve that but maybe there's a better solution.
CPython versions tested on:
3.13
Operating systems tested on:
Linux