def get_version(module):
    """
    Attempts to read a version attribute from the given module that
    could be specified via several different names and formats.
    """
    version_names = ["__version__", "get_version", "version"]
    version_names.extend([name.upper() for name in version_names])
    for name in version_names:
        try:
            version = getattr(module, name)
        except AttributeError:
            continue
        if callable(version):
            version = version()
        try:
            version = ".".join([str(i) for i in version.__iter__()])
        except AttributeError:
            pass
        return version