如何在Python中将源媒体路径从google analytics中分离出来？

from google.oauth2 import service_account
from googleapiclient.discovery import build

# 设置Google Analytics的凭据和权限
credentials = service_account.Credentials.from_service_account_file(
    'path/to/service-account-key.json',
    scopes=['https://www.googleapis.com/auth/analytics.readonly']
)

# 创建API客户端
analytics = build('analyticsreporting', 'v4', credentials=credentials)

# 构建请求对象
request = {
    'viewId': 'YOUR_VIEW_ID',
    'dateRanges': [{'startDate': '2022-01-01', 'endDate': '2022-01-31'}],
    'metrics': [{'expression': 'ga:sessions'}],
    'dimensions': [{'name': 'ga:sourceMedium'}, {'name': 'ga:pagePath'}],
    'dimensionFilterClauses': [{
        'filters': [{'dimensionName': 'ga:sourceMedium', 'operator': 'EXACT', 'expressions': ['google / organic']}]
    }]
}

# 执行API请求
response = analytics.reports().batchGet(body={'reportRequests': [request]}).execute()

# 提取媒体路径数据
for report in response['reports']:
    for row in report['data']['rows']:
        source_medium = row['dimensions'][0]
        page_path = row['dimensions'][1]
        print(f'Source/Medium: {source_medium}, Page Path: {page_path}')