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Hi Sir, 
Thanks for your help with the code, I have tried but getting an error, Actually I am confused where I need to put my login details and secret keys etc. Here I have added my code and error found. 
Thanks

Here is my code sample:  
import os
from dotenv import load_dotenv
load_dotenv(dotenv_path=os.getenv('ENV_PATH'))

from ringcentral import SDK

sdk = SDK(
    os.getenv('MyClientId'),
    os.getenv('Mysecret Key'),
    os.getenv('https://platform.devtest.ringcentral.com'))

platform = sdk.platform()
platform.login(
    os.getenv('MyUsername'),
    os.getenv('MyExtention'),
    os.getenv('MyPassword'))


try:
    from urllib import urlencode
except: # For Python 3
    from urllib.parse import urlencode

query = {
    'dateFrom': '2018-05-01T00:00:00Z',
    'dateTo': '2018-06-01T00:00:00Z',
    'direction': 'Outbound',
    'type': 'Voice',
    'view': 'Detailed'}

qs = urlencode(query)

res = platform.get('/restapi/v1.0/account/~/extension/~/call-log?'+qs)

print(res.text())

Here is the error: 

Traceback (most recent call last):
  File "C:/Python34/Ringcentral.py", line 20, in <module>
    os.getenv('MyPassword'))
  File "C:\Python34\lib\site-packages\ringcentral\platform\platform.py", line 105, in login
    raise e
  File "C:\Python34\lib\site-packages\ringcentral\platform\platform.py", line 82, in login
    raise Exception('Either code or username with password has to be provided')
Exception: Either code or username with password has to be provided

When making a call to the call-log end point, set the following query parameters:

• dateFrom
• dateTo
• direction = 'Outbound'
• type = 'Voice'
• view = 'Detailed'

See this example in Python here:

https://github.com/grokify/ringcentral-python-examples/blob/master/demo_call-log.py