python:IOError: [Errno 13] Permission denied. When I tried google-analytics-api sample code
<p>I am trying to get data from google-analytics-api, I run the sample code:HelloAnalytics.py(<a href="https://developers.google.com/analytics/devguides/reporting/core/v3/quickstart/service-py" rel="nofollow noreferrer">https://developers.google.com/analytics/devguides/reporting/core/v3/quickstart/service-py</a>),
but there are some error:IOError: [Errno 13]
I had added my service account email address to my GA account
I am using mac os.</p>

<p>detail error message:</p>

<pre><code>   Traceback (most recent call last):
  File "/Users/mac/Documents/python-f/HelloAnalytics.py", line 82, in &lt;module&gt;
    main()
  File "/Users/mac/Documents/python-f/HelloAnalytics.py", line 77, in main
    analytics = initialize_analyticsreporting()
  File "/Users/mac/Documents/python-f/HelloAnalytics.py", line 34, in initialize_analyticsreporting
    analytics = build('analytics', 'v4', http=http, discoveryServiceUrl=DISCOVERY_URI)
  File "build/bdist.macosx-10.12-intel/egg/oauth2client/_helpers.py", line 133, in positional_wrapper
  File "build/bdist.macosx-10.12-intel/egg/googleapiclient/discovery.py", line 222, in build
  File "build/bdist.macosx-10.12-intel/egg/googleapiclient/discovery.py", line 269, in _retrieve_discovery_doc
  File "build/bdist.macosx-10.12-intel/egg/oauth2client/transport.py", line 159, in new_request
  File "build/bdist.macosx-10.12-intel/egg/oauth2client/client.py", line 744, in _refresh
  File "build/bdist.macosx-10.12-intel/egg/oauth2client/client.py", line 775, in _do_refresh_request
  File "build/bdist.macosx-10.12-intel/egg/oauth2client/transport.py", line 282, in request
  File "/Library/Python/2.7/site-packages/httplib2-0.9.2-py2.7.egg/httplib2/__init__.py", line 1609, in request
    (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
  File "/Library/Python/2.7/site-packages/httplib2-0.9.2-py2.7.egg/httplib2/__init__.py", line 1351, in _request
    (response, content) = self._conn_request(conn, request_uri, method, body, headers)
  File "/Library/Python/2.7/site-packages/httplib2-0.9.2-py2.7.egg/httplib2/__init__.py", line 1272, in _conn_request
    conn.connect()
  File "/Library/Python/2.7/site-packages/httplib2-0.9.2-py2.7.egg/httplib2/__init__.py", line 1036, in connect
    self.disable_ssl_certificate_validation, self.ca_certs)
  File "/Library/Python/2.7/site-packages/httplib2-0.9.2-py2.7.egg/httplib2/__init__.py", line 80, in _ssl_wrap_socket
    cert_reqs=cert_reqs, ca_certs=ca_certs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 911, in wrap_socket
    ciphers=ciphers)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 520, in __init__
    self._context.load_verify_locations(ca_certs)
IOError: [Errno 13] Permission denied
</code></pre>

<p>the source code:</p>

<pre><code>"""Hello Analytics Reporting API V4."""

import argparse

from apiclient.discovery import build
from oauth2client.service_account import ServiceAccountCredentials

import httplib2
from oauth2client import client
from oauth2client import file
from oauth2client import tools


SCOPES = ['https://www.googleapis.com/auth/analytics.readonly']
DISCOVERY_URI = ('https://analyticsreporting.googleapis.com/$discovery/rest')
KEY_FILE_LOCATION = '/Users/mac/Documents/python-f/MyProject-a7c00ebc9685.p12'
SERVICE_ACCOUNT_EMAIL = 'data-510@prime-imagery-150409.iam.gserviceaccount.com'
VIEW_ID = '120100451'


def initialize_analyticsreporting():
  """Initializes an analyticsreporting service object.

  Returns:
    analytics an authorized analyticsreporting service object.
  """

  credentials = ServiceAccountCredentials.from_p12_keyfile(
    SERVICE_ACCOUNT_EMAIL, KEY_FILE_LOCATION, scopes=SCOPES)

  http = credentials.authorize(httplib2.Http())

  # Build the service object.
  analytics = build('analytics', 'v4', http=http, discoveryServiceUrl=DISCOVERY_URI)

  return analytics


def get_report(analytics):
  # Use the Analytics Service Object to query the Analytics Reporting API V4.
  return analytics.reports().batchGet(
      body={
        'reportRequests': [
        {
          'viewId': VIEW_ID,
          'dateRanges': [{'startDate': '7daysAgo', 'endDate': 'today'}],
          'metrics': [{'expression': 'ga:sessions'}]
        }]
      }
  ).execute()


def print_response(response):
  """Parses and prints the Analytics Reporting API V4 response"""

  for report in response.get('reports', []):
    columnHeader = report.get('columnHeader', {})
    dimensionHeaders = columnHeader.get('dimensions', [])
    metricHeaders = columnHeader.get('metricHeader', {}).get('metricHeaderEntries', [])
    rows = report.get('data', {}).get('rows', [])

    for row in rows:
      dimensions = row.get('dimensions', [])
      dateRangeValues = row.get('metrics', [])

      for header, dimension in zip(dimensionHeaders, dimensions):
        print header + ': ' + dimension

      for i, values in enumerate(dateRangeValues):
        print 'Date range (' + str(i) + ')'
        for metricHeader, value in zip(metricHeaders, values.get('values')):
          print metricHeader.get('name') + ': ' + value


def main():

  analytics = initialize_analyticsreporting()
  response = get_report(analytics)
  print_response(response)

if __name__ == '__main__':
  main()
</code></pre>