如何在 python 中進行沒有堆棧溢出的遞歸？

Question

我正在使用 ZODB 數據庫開發一個項目，遇到以下問題：

def balance(db, id, max_sleep, manager=None):
'''to calculate the funds of an account(saving + checking)'''
if manager is None:
    transaction = TransactionManager()
else:
    transaction = manager
transaction.begin()
try:
    name = db['account'][id].getName()
    funds = db['saving'][name].balance + db['checking'][name].balance
    transaction.commit()
    return funds
except Exception:
    sleep(randint(0, max_sleep)*(10**-6))
    balance(db, id, max_sleep, manager)

我需要遞歸 function 直到交易完成； 我不需要將它們堆疊起來，我嘗試增加更多的睡眠時間但是事務仍然需要遞歸這么多（即使只有 2 個線程。）？ 有沒有辦法解決這個問題！？

Answer 1

考慮改用while循環：

def balance(db, id, max_sleep, manager=None):
  '''to calculate the funds of an account(saving + checking)'''
  if manager is None:
      transaction = TransactionManager()
  else:
      transaction = manager
  while True:
    transaction.begin()
    try:
      name = db['account'][id].getName()
      funds = db['saving'][name].balance + db['checking'][name].balance
      transaction.commit()
      return funds
    except Exception:
      sleep(randint(0, max_sleep)*(10**-6))