บัญชีชื่อ 337 มีธุรกรรมกี่รายการ?
How many transaction does account with name 337 have?
df_Accounts = pd.DataFrame(columns = ['account_id', 'account_name'])
df_Financial_transactions = pd.DataFrame(columns = ['account_id'])
df_Financial_transactions['account_id'].value_counts()[df_Accounts[df_Accounts['account_name'] == '337']['account_id'].values[0]]