I want script in python3 with QGIS 3?
For example:
This code create a layout 2019_A4 and add Layout Manager. I need a code make same in QGIS3 using QgsLayoutManager with Methods duplicateLayout
Here: https://qgis.org/pyqgis/3.4/core/QgsLayoutManager.html
from qgis.PyQt.QtCore import *
from qgis.core import *
# A Project, Manager, & PrintLayout Classes
project = QgsProject.instance()
manager = project.layoutManager()
# layout = QgsPrintLayout(project)
layout = manager.layoutByName("2019_A4")
#layout.initializeDefaults()
#layout.setName('2019_A')
manager.addLayout(layout)