code: def h2oremove_all():
      """
      Python API test: h2o.remove_all()
  
      Cannot test this one on Jenkins.  It will crash other tests.  So, Pasha found a way around this
      by just checking the argument list which should be empty.
      """
      # call with no arguments
      signature = inspect.getfullargspec(h2o.remove_all)
      assert (
          len(signature.args) == 1
      ), "h2o.remove_all() should have one optional argument!"
      assert signature.args[0] == "retained"
  
imports: import sys
  from tests import pyunit_utils
  import h2o
  import inspect
label_desc: Use image node_id 1 for calling a global function with example usage: h2oremove_all() without return types