code: def pyunit_pop():
      pros = h2o.import_file(
          pyunit_utils.locate("smalldata/prostate/prostate.csv")
      )
      nc = pros.ncol
      popped_col = pros.pop(pros.names[0])
  
      print(pros.dim)
      print(popped_col.dim)
  
      assert popped_col.ncol == 1
      assert pros.ncol == nc - 1
  
label_desc: Use image node_id 1 for calling a global function with example usage: pyunit_pop() without return types