parameters: (self, subnode_xpath_expr)
return_statement: return None
docstring: Finds a subnode in the host node and the retrieves a value from it.
  
          @return An attribute value
docstring_summary: Finds a subnode in the host node and the retrieves a value from it.
docstring_tokens: Finds a subnode in the host node and the retrieves a value from it .
function: def get_text_from_subnode(self, subnode_xpath_expr):
          """
          Finds a subnode in the host node and the retrieves a value from it.
  
          @return An attribute value
          """
          sub_node = self.node.find(subnode_xpath_expr)
          if sub_node is not None:
              return sub_node.text
  
          return None
function_tokens: def get_text_from_subnode ( self , subnode_xpath_expr ) : sub_node = self . node . find ( subnode_xpath_expr ) if sub_node is not None : return sub_node . text return None