OPmenu.xml

<menuDocument>
  <!-- menuDocument can only contain 1 menu element, whose id is 
         implicitly "root_menu"
      -->
  <menu>
    <subMenu id="houdini_easy_compile_block_menu">
      <label>Easy Compile</label>
      <context>
        <expression>
          <![CDATA[
try:
  from HoudiniEasyCompileBlock import houdini_easy_compile_block
  reload(houdini_easy_compile_block)
  return houdini_easy_compile_block.is_valid_forloop_compilation(kwargs["node"]) or \
         len(hou.selectedNodes()) > 1
except Exception as e:
  return False]]>
        </expression>
      </context>
      <scriptItem id="houdini_easy_compile_block">
        <label>Compile For loop</label>
        <context>
          <expression>
            <![CDATA[
try:
  from HoudiniEasyCompileBlock import houdini_easy_compile_block
  reload(houdini_easy_compile_block)
  return houdini_easy_compile_block.is_valid_forloop_compilation(kwargs["node"])
except Exception as e:
  return False]]>
          </expression>
        </context>
        <scriptCode>
          <![CDATA[
from HoudiniEasyCompileBlock import houdini_easy_compile_block
reload(houdini_easy_compile_block)
houdini_easy_compile_block.compile_forloop(node=kwargs["node"])
]]>
        </scriptCode>
      </scriptItem>

      <scriptItem id="houdini_easy_compile_block_selection">
        <label>Compile Node Selection</label>
        <context>
          <expression>
            <![CDATA[
try:
  import hou
  return len(hou.selectedNodes()) > 1
except Exception as e:
  return False]]>
          </expression>
        </context>
        <scriptCode>
          <![CDATA[
from HoudiniEasyCompileBlock import houdini_easy_compile_block
reload(houdini_easy_compile_block)
houdini_easy_compile_block.compile_selection()
]]>
        </scriptCode>
      </scriptItem>

      <scriptItem id="houdini_easy_compile_updade_node">
        <label>Easy Compile Block: Update Node</label>
        <context>
          <expression>
            <![CDATA[
try:
  from HoudiniEasyCompileBlock import houdini_easy_compile_block
  reload(houdini_easy_compile_block)
  return houdini_easy_compile_block.is_valid_for_node_update(node=kwargs["node"])
except Exception as e:
  return False]]>
          </expression>
        </context>
        <scriptCode>
          <![CDATA[
from HoudiniEasyCompileBlock import houdini_easy_compile_block
reload(houdini_easy_compile_block)
houdini_easy_compile_block.update_selected_node(node=kwargs["node"])
]]>
        </scriptCode>
      </scriptItem>

  </subMenu>
  </menu>
</menuDocument>