是的，BIM 360 API提供了一种批量分配"默认角色"的方法。以下是一个示例Python脚本，演示如何使用API将默认角色分配给一个项目中的所有成员。

首先，在Autodesk Developer Network上创建BIM 360 API凭据，获取访问令牌。

然后，在Python中运行以下代码示例，将BIM 360中的默认角色分配给项目中的所有成员：

import requests
import json

# Set up variables with access token, project ID, and default role ID
access_token = "YOUR_ACCESS_TOKEN_HERE"
project_id = "YOUR_PROJECT_ID_HERE"
default_role_id = "DEFAULT_ROLE_ID_HERE"

# Set up header for accessing BIM 360 API
headers = {
    "Authorization": "Bearer " + access_token,
    "Content-Type": "application/json"
}

# Get list of all members in project
members_url = "https://developer.api.autodesk.com/hq/v1/accounts/:account_id/projects/" + project_id + "/members"
response = requests.get(members_url, headers=headers)
members = json.loads(response.text)["data"]

# Loop through all members and assign default role
for member in members:
    member_id = member["id"]
    assign_default_role_url = "https://developer.api.autodesk.com/hq/v1/accounts/:account_id/projects/" + project_id + "/members/" + member_id + "/assign_role"
    data = {
        "role_id": default_role_id
    }
    response = requests.post(assign_default_role_url, headers=headers, data=json.dumps(data))

在此示例中，将默认角色ID、访问令牌和项目ID替换为实际值，然后运行脚本即可将默认角色分配给项目中的所有成员。