Create and traverse project tree of Redmine

CZ201412sample.py

from redmine import Redmine

class ProjectNode(object):
    def __init__(self, project):
        self.project = project
        self.children = []
        self.has_parent = hasattr(project, u'parent')
    
    def add_child(self, child):
        self.children.append(child)
    
    def trace(self, family=None):
        family = [] if family is None else family
        family.append(self.project.name)
        
        self.execute(family)
        
        if len(self.children) > 0:
            for child in self.children:
                child.trace(family)
        family.pop()

    def execute(self, family=None):
        print("%s has %d children" % ('/'.join(family), len(self.children)))

redmine = Redmine('http://redmine-server/', key='API_KEY')

projects = redmine.project.all()

project_map = {}
for project in projects:
    project_map[project.id] = ProjectNode(project)

project_root = []
for node in project_map.values():
    if node.has_parent:
        parent_id = node.project.parent.id
        project_map[parent_id].add_child(node)
    else:
        project_root.append(node)

for node in project_root:
    node.trace()