Parallel links creates an error in DrawIO

[Gitpear]

When adding links the function addLink creates IDs based on source and destination.
When there are multiple parallel links between two nodes DrawIO throws an error as it cannot handle duplicates.

Solved by creating uniqe IDs.

One solution could be to generate a random string and attach it to the ID.

import random
import string

    def addLink(self,sourceNodeID,destinationNodeID):
        try: 
            for mxCell in self.root:
                print(mxCell.attrib['id'])
                print(type(mxCell.attrib['id']))
                print(sourceNodeID)
                print(type(sourceNodeID))
                if mxCell.attrib['id'] == sourceNodeID:
                    print('Element found' + {mxCell.attrib['id']})
                    break
            return
        except Exception as e:
            print(e)
        random_string = ''.join(random.choices(string.ascii_letters + string.digits, k=4))
        mxCell = ET.SubElement(self.root,
                                'mxCell',
                                id=sourceNodeID+destinationNodeID+random_string,
                                style="endFill=0;endArrow=none;",
                                parent="1",
                                source=sourceNodeID,
                                target=destinationNodeID,
                                edge="1")
        mxGeometry = ET.SubElement(mxCell, 'mxGeometry')
        mxGeometry.set('as','geometry')