def adata():
    adata = ad.AnnData(np.zeros((100, 100)))
    adata.obsm["o"] = np.zeros((100, 50))
    adata.varm["o"] = np.zeros((100, 50))
    return adata
def exact(root, cwd, files, badfn=None):
    return exactmatcher(root, cwd, files, badfn=badfn)