Function getsyspath

mypy/pyinfo.py:40–66

()

def getsyspath() -> list[str]:
    # Do not include things from the standard library
    # because those should come from typeshed.
    stdlib_zip = os.path.join(
        sys.base_exec_prefix,
        getattr(sys, "platlibdir", "lib"),
        f"python{sys.version_info.major}{sys.version_info.minor}.zip",
    )
    stdlib = sysconfig.get_path("stdlib")
    stdlib_ext = os.path.join(stdlib, "lib-dynload")
    excludes = {stdlib_zip, stdlib, stdlib_ext}

    # Drop the first entry of sys.path
    # - If pyinfo.py is executed as a script (in a subprocess), this is the directory
    #   containing pyinfo.py
    # - Otherwise, if mypy launched via console script, this is the directory of the script
    # - Otherwise, if mypy launched via python -m mypy, this is the current directory
    # In all these cases, it is desirable to drop the first entry
    # Note that mypy adds the cwd to SearchPaths.python_path, so we still find things on the
    # cwd consistently (the return value here sets SearchPaths.package_path)

    # Python 3.11 adds a "safe_path" flag wherein Python won't automatically prepend
    # anything to sys.path. In this case, the first entry of sys.path is no longer special.
    offset = 0 if sys.version_info >= (3, 11) and sys.flags.safe_path else 1

    abs_sys_path = (os.path.abspath(p) for p in sys.path[offset:])
    return [p for p in abs_sys_path if p not in excludes]


def getsearchdirs() -> tuple[list[str], list[str]]: