code: def test_drop_na_hyper(self):
      df = pd.DataFrame({"a": ["a", None, "c"], "i": [1, 2, None]})
  
      hg = graphistry.hypergraph(df, drop_na=True)
  
      assert len(hg["graph"]._nodes) == 7
      assert len(hg["graph"]._edges) == 4
  
imports: import datetime, logging, pandas, pyarrow
  import pytest
  import graphistry, graphistry.plotter
  from common import NoAuthTestCase
label_desc: Use image node_id 7 for calling the TestHypergraphPlain obj's underlying member method code with example usage: obj.test_drop_na_hyper() without return types