数据格式-层级关系展示

import pprint

department_list = [
    {'id': 1, 'label': '总部', 'parent_id': None, "children": []},
    {'id': 2, 'label': '分部', 'parent_id': 1, "children": []},
    {'id': 3, 'label': '部门一', 'parent_id': 2, "children": []},
    {'id': 4, 'label': '部门二', 'parent_id': 2, "children": []},
]

department_dict = {}
for department in department_list:
    department_dict[department["id"]] = department

pprint.pprint(department_dict)
"""
{1: {'children': [], 'id': 1, 'label': '总部', 'parent_id': None},
 2: {'children': [], 'id': 2, 'label': '分部', 'parent_id': 1},
 3: {'children': [], 'id': 3, 'label': '部门一', 'parent_id': 2},
 4: {'children': [], 'id': 4, 'label': '部门二', 'parent_id': 2}}
"""

department_data = []
for department in department_list:
    pid = department["parent_id"]
    if pid:
        department_dict["label"] = department['label']
        department_dict[pid]["children"].append(department)
    else:
        department_data.append(department)


pprint.pprint(department_data)
"""
[{'children': [{'children': [{'children': [],
                              'id': 3,
                              'label': '部门一',
                              'parent_id': 2},
                             {'children': [],
                              'id': 4,
                              'label': '部门二',
                              'parent_id': 2}],
                'id': 2,
                'label': '分部',
                'parent_id': 1}],
  'id': 1,
  'label': '总部',
  'parent_id': None}]

"""