is_windows

scikitplot.cython.is_windows()

Return True if the host operating system is native Windows.

Warning

This detects the host OS, not the active compiler toolchain, and is therefore not the correct predicate for selecting compiler flags. On a native-Windows host using MinGW-w64 or an MSYS2 MINGW64 shell, the active compiler is GCC, yet this function still returns True. Passing MSVC flags (e.g. /O2) to GCC causes a build failure or a silently unoptimized build. Use _is_msvc to select flags.

Returns:

bool

True if os.name == "nt" or sys.platform starts with "win"; False otherwise (including WSL, Cygwin, and Linux-to-Windows cross-compilation).

Return type:

bool

See also

_is_msvc

Toolchain predicate; the correct basis for flag selection.

Notes

Retained in the public API for backward compatibility and for callers that legitimately need host-OS detection (e.g. path handling). It intentionally no longer governs the compiler-flag branches in resolve_profile.