code: def test_equal():
      r = PandasMmtf.rmsd(p1t48.df["ATOM"], p1t48.df["ATOM"], s=None)
      assert r == 0.000, r
  
file_path: biopandas/biopandas/mmtf/tests/test_rmsd.py
imports: import os
  from biopandas.mmtf import PandasMmtf
  from nose.tools import raises
label_desc: Use image node_id 1 for calling a global function with example usage: test_equal() without return types