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#!/usr/bin/env python
from googleads import adwords


    

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def DisplayAccountTree(account, accounts, links, depth=0):
    """Displays an account tree.

    Args:
        account: dict The account to display.
        accounts: dict Map from customerId to account.
        links: dict Map from customerId to child links.
        depth: int Depth of the current account in the tree.
    """
    prefix = '-' * depth * 2
    print '%s%s, %s' % (prefix, account['customerId'], account['name'])
    if account['customerId'] in links:
        for child_link in links[account['customerId']]:
            child_account = accounts[child_link['clientCustomerId']]
            DisplayAccountTree(child_account, accounts, links, depth + 1)


def get_accounts(client):
    # Initialize appropriate service.
    managed_customer_service = client.GetService('ManagedCustomerService', version='v201705')

    # Construct selector to get all accounts.
    offset = 0
    selector = {
        'fields': ['CustomerId', 'Name'],
        'paging': {
           'startIndex': str(offset),
           'numberResults': str(PAGE_SIZE)
        }
    }
    more_pages = True
    accounts = {}
    child_links = {}
    parent_links = {}
    root_account = None

    while more_pages:
        # Get serviced account graph.
        page = managed_customer_service.get(selector)
        if 'entries' in page and page['entries']:
            # Create map from customerId to parent and child links.
            if 'links' in page:
                for link in page['links']:
                    if link['managerCustomerId'] not in child_links:
                        child_links[link['managerCustomerId']] = []
                    child_links[link['managerCustomerId']].append(link)
                    if link['clientCustomerId'] not in parent_links:
                        parent_links[link['clientCustomerId']] = []
                    parent_links[link['clientCustomerId']].append(link)
            # Map from customerID to account.
            for account in page['entries']:
                accounts[account['customerId']] = account
        offset += PAGE_SIZE
        selector['paging']['startIndex'] = str(offset)
        more_pages = offset < int(page['totalNumEntries'])

    # Find the root account.
    for customer_id in accounts:
        if customer_id not in parent_links:
            root_account = accounts[customer_id]

    # Display account tree.
    if root_account:
        print 'CustomerId, Name'
        DisplayAccountTree(root_account, accounts, child_links, 0)
    else:
        print 'Unable to determine a root account'


    

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# Initialize client object.
PAGE_SIZE = 500
adwords_client = adwords.AdWordsClient.LoadFromStorage()
get_accounts(adwords_client)


    

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