def require_version(requirement: str, hint: Optional[str] = None) -> None:
    """
    Perform a runtime check of the dependency versions, using the exact same syntax used by pip.

    The installed module version comes from the *site-packages* dir via *importlib.metadata*.

    Args:
        requirement (`str`): pip style definition, e.g.,  "tokenizers==0.9.4", "tqdm>=4.27", "numpy"
        hint (`str`, *optional*): what suggestion to print in case of requirements not being met

    Example:

    ```python
    require_version("pandas>1.1.2")
    require_version("numpy>1.18.5", "this is important to have for whatever reason")
    ```"""

    hint = f"\n{hint}" if hint is not None else ""

    # non-versioned check
    if re.match(r"^[\w_\-\d]+$", requirement):
        pkg, op, want_ver = requirement, None, None
    else:
        match = re.findall(r"^([^!=<>\s]+)([\s!=<>]{1,2}.+)", requirement)
        if not match:
            raise ValueError(
                "requirement needs to be in the pip package format, .e.g., package_a==1.23, or package_b>=1.23, but"
                f" got {requirement}"
            )
        pkg, want_full = match[0]
        want_range = want_full.split(",")  # there could be multiple requirements
        wanted = {}
        for w in want_range:
            match = re.findall(r"^([\s!=<>]{1,2})(.+)", w)
            if not match:
                raise ValueError(
                    "requirement needs to be in the pip package format, .e.g., package_a==1.23, or package_b>=1.23,"
                    f" but got {requirement}"
                )
            op, want_ver = match[0]
            wanted[op] = want_ver
            if op not in ops:
                raise ValueError(f"{requirement}: need one of {list(ops.keys())}, but got {op}")

    # special case
    if pkg == "python":
        got_ver = ".".join([str(x) for x in sys.version_info[:3]])
        for op, want_ver in wanted.items():
            _compare_versions(op, got_ver, want_ver, requirement, pkg, hint)
        return

    # check if any version is installed
    try:
        got_ver = importlib.metadata.version(pkg)
    except importlib.metadata.PackageNotFoundError:
        raise importlib.metadata.PackageNotFoundError(
            f"The '{requirement}' distribution was not found and is required by this application. {hint}"
        )

    # check that the right version is installed if version number or a range was provided
    if want_ver is not None:
        for op, want_ver in wanted.items():
            _compare_versions(op, got_ver, want_ver, requirement, pkg, hint)

    Perform a runtime check of the dependency versions, using the exact same syntax used by pip.

    The installed module version comes from the *site-packages* dir via *importlib.metadata*.

    Args:
        requirement (`str`): pip style definition, e.g.,  "tokenizers==0.9.4", "tqdm>=4.27", "numpy"
        hint (`str`, *optional*): what suggestion to print in case of requirements not being met

    Example:

    ```python
    require_version("pandas>1.1.2")
    require_version("numpy>1.18.5", "this is important to have for whatever reason")
    ```
src/diffusers/utils/versions.py