Google API Client for pythonでアナリティクス APIからデータ取得

リファレンス
https://developers.google.com/analytics/devguides/reporting/core/v4/quickstart/installed-py

サンプルclass

class GoogleAnalyticsUtility(object):
    SCOPES = ['https://www.googleapis.com/auth/analytics.readonly']
    DISCOVERY_URI = ('https://analyticsreporting.googleapis.com/$discovery/rest')
    VIEW_ID = 'xxxx'

    def __init__(self, target_date):
        self.target_date = target_date

    def get_report(self):
        parser = argparse.ArgumentParser(
                formatter_class=argparse.RawDescriptionHelpFormatter,
                parents=[tools.argparser])
        flags = parser.parse_args(['--noauth_local_webserver'])
        CLIENT_SECRETS_PATH = os.path.join(settings.BASE_DIR, '../etc/googleapi/client_id.json')
        flow = client.flow_from_clientsecrets(
                CLIENT_SECRETS_PATH, scope=self.SCOPES,
                message=tools.message_if_missing(CLIENT_SECRETS_PATH))

        storage = file.Storage(os.path.join(settings.BASE_DIR, '../etc/googleapi/analyticsreporting.dat'))
        credentials = storage.get()
        if credentials is None or credentials.invalid:
            credentials = tools.run_flow(flow, storage, flags)
        http = credentials.authorize(http=httplib2.Http())
        analytics = build('analytics', 'v4', http=http, discoveryServiceUrl=self.DISCOVERY_URI)
        reports = analytics.reports()
        return reports.batchGet(
                body={
                    'reportRequests': [
                        {
                            'viewId': self.VIEW_ID,
                            'dateRanges': [{'startDate': self.target_date, 'endDate': 'today'}],
                            "dimensions": [
                                {
                                    "name": "ga:productSku",  # 販売した品目の商品コードです。
                                }],
                            'metrics': [
                                {'expression': 'ga:itemQuantity'}  # e コマース トランザクションで売れた商品の数です。
                            ],
                            'pageSize': 50000,
                            'pageToken': "nextpage",
                            "orderBys":
                                [
                                    {"fieldName": "ga:itemQuantity", "sortOrder": "DESCENDING"},
                                ]
                        }]
                }
        ).execute()

target_date = date.today() - timedelta(days=7)
ga = GoogleAnalyticsUtility(target_date.strftime('%Y-%m-%d'))
ga.get_report()

コマンドラインで叩いた場合,リンクが表示されるのでこれをコピペしてブラウザに貼り付ければ認証完了

https://accounts.google.com/o/oauth2/auth?scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fanalytics.readonly&redirect_uri=http%3A%2F%2Flocalhost%3A8080%2F&response_type=code&client_id=xxxxx-gd5j31ge4jdobhlg9a3jqnveae34cag1.apps.googleusercontent.com&access_type=offline