code: def h2o_H2OFrame_runif():
      """
      Python API test: h2o.frame.H2OFrame.runif(seed=None)
      """
      python_lists = np.random.uniform(0, 1, 10000)
      h2oframe = h2o.H2OFrame(python_obj=python_lists)
      h2oRunif = h2oframe.runif(seed=None)
  
      # check mean and std
      assert (
          abs(h2oframe.mean().flatten() - h2oRunif.mean()) < 1e-2
      ), "h2o.H2OFrame.runif() command is not working."
      assert (
          abs(h2oframe.sd()[0] - h2oRunif.sd()[0]) < 1e-2
      ), "h2o.H2OFrame.runif() command is not working."
  
imports: import sys
  import h2o
  from tests import pyunit_utils
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: h2o_H2OFrame_runif() without return types