The xml.dom contains the following functions:
None. If it is not
None, imports the corresponding module and returns a DOMImplementation object if the import succeeds. If no name is given, and if the environment variable PYTHON_DOM is set, this variable is used to find the implementation.
If name is not given, consider the available implementations to find one with the required feature set. If no implementation can be found, raise an ImportError. The features list must be a sequence of (feature, version) pairs which are passed to hasFeature.
In addition, xml.dom contains the Node, and the DOM exceptions.
See About this document... for information on suggesting changes.