以下是一个使用Autodesk Forge API进行2-legged身份验证的代码示例：

import requests

# Forge API credentials
client_id = 'YOUR_CLIENT_ID'
client_secret = 'YOUR_CLIENT_SECRET'

# Forge API endpoints
auth_url = 'https://developer.api.autodesk.com/authentication/v1/authenticate'
api_url = 'https://developer.api.autodesk.com/modelderivative/v2/designdata/job'

# Get access token
def get_access_token():
    data = {
        'client_id': client_id,
        'client_secret': client_secret,
        'grant_type': 'client_credentials',
        'scope': 'data:read'
    }
    response = requests.post(auth_url, data=data)
    access_token = response.json()['access_token']
    return access_token

# Make a request to Forge API using the access token
def make_api_request(access_token):
    headers = {
        'Authorization': 'Bearer ' + access_token,
        'Content-Type': 'application/json'
    }
    payload = {
        'input': {
            'urn': 'YOUR_URN',
            'rootFilename': 'YOUR_FILE_NAME',
            'compressedUrn': True
        },
        'output': {
            'formats': [
                {
                    'type': 'svf',
                    'views': ['2d', '3d']
                }
            ]
        }
    }
    response = requests.post(api_url, headers=headers, json=payload)
    job_id = response.json()['id']
    return job_id

# Main function
def main():
    access_token = get_access_token()
    job_id = make_api_request(access_token)
    print('Job ID:', job_id)

if __name__ == '__main__':
    main()

请确保替换YOUR_CLIENT_ID和YOUR_CLIENT_SECRET为您在Autodesk Forge上注册应用程序时获得的客户端ID和客户端密钥。同时，将YOUR_URN和YOUR_FILE_NAME替换为您要处理的文件的URN和文件名。