import vwo

settings_file = vwo.get_settings_file(account_id, sdk_key)
vwo_client_instance = vwo.launch(settings_file)

# activate API
variation_name = vwo_client_instance.activate(ab_campaign_key, user_id)

# get_variation_name API
variation_name = vwo_client_instance.get_variation_name(ab_campaign_key, user_id)

# track API
vwo_client_instance.track(ab_campaign_key, user_id, ab_campaign_goal_identifeir, revenue_value)

import vwo
from vwo import LogLevels

settings_file = vwo.get_settings_file(account_id, sdk_key)
vwo_client_instance = vwo.launch(settings_file, log_level=LogLevels.DEBUG)

import vwo

class CustomLogger:
   def log(self, level, message):
      print(level, message)
      # ...write to file or database or integrate with any third-party service

settings_file = vwo.get_settings_file(account_id, sdk_key)
vwo_client_instance = vwo.launch(settings_file, logger = CustomLogger())

import vwo
from vwo import logger

class user_storage(UserStorage):
  def get(self, user_id, campaign_key):
    # ...code here for getting data
    # return data

  def set(self, user_storage_data):
    # ...code to persist data

us = user_storage()

settings_file = vwo.get_settings_file(account_id, sdk_key)
vwo_client_instance = vwo.launch(settings_file, user_storage = us)