def iter_importers(fullname=""):
    if fullname.startswith('.'):
        raise ImportError("Relative module names not supported")
    if '.' in fullname:
        # Get the containing package's __path__
        pkg = '.'.join(fullname.split('.')[:-1])
        if pkg not in sys.modules:
            __import__(pkg)
        path = getattr(sys.modules[pkg], '__path__', None) or []
    else:
        for importer in sys.meta_path:
            yield importer
        path = sys.path
    for item in path:
        yield get_importer(item)
    if '.' not in fullname:
        yield ImpImporter()
Return means for each period in x. freq is an int that gives the
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/pkgutil.py/iter_importers--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/tsa/seasonal.py/seasonal_mean