pyqgis - How to show a QgsComposition created in the QGIS Python console?

I'm trying to develop a similar script to How to make serial maps from template?. I'd like to modify elements in the composition programmatically for each map that I want to print. In developing this I'd like to see the elements I'm modifying in the console without printing off the map. I was expecting to see a new print composer window open when I ran the below code from the QGIS console in 2.18.2, but nothing happens (no error message appears either).

from qgis.PyQt.QtXml import QDomDocument
def loadPrintComposerTemplate(template):
    '''Load a print composer template from provided filename argument

    Args:
        template: readable .qpt template filename

    Returns:

        myComposition: a QgsComposition loaded from the provided template
        mapSettings: a QgsMapSettings object associated with myComposition'''
    mapSettings = QgsMapSettings()
    myComposition = QgsComposition(mapSettings)
    # Load template from filename
    with open(template, 'r') as templateFile:
        myTemplateContent = templateFile.read()

    myDocument = QDomDocument()
    myDocument.setContent(myTemplateContent)

    return myComposition.loadFromTemplate(myDocument), mapSettings
composer, mapSet = loadPrintComposerTemplate(template)

Is this code correct? Is there a way to make the print composer appear? Is there a better way to test my code?

Answer

To open the new composer

from qgis.utils import iface
newcomp = iface.createNewComposer()

Load the template into the composer

newcomp.composition().loadFromTemplate(myDocument)

Has been taken from Here. Works in 2.18.2