UnboundLocalError後sys.exit（）

Question

這是我的錯誤：

Traceback (most recent call last): 
    File "./datalogger.py", line 208, in <module> 
    calculateamounttosend() 
    File "./datalogger.py", line 36, in calculateamounttosend 
    return send_amount 
UnboundLocalError: local variable 'send_amount' referenced before assignment 

208行是：

calculateamounttosend() 

功能是：

def calculateamounttosend(): 
     wallet_balance = float(subprocess.check_output(['solarcoind', 'getbalance'], shell=False)) 
     if wallet_balance < 0.0005: 
       print ("*******ERROR: wallet balance of {}SLR too low for reliable datalogging, add more SLR to wallet $ 
       time.sleep(10) 
       sys.exit 
     elif wallet_balance >= 10: 
       send_amount = str(1) 
       print ('Based on wallet balance of {} amount to send to self set to {} SLR') .format(wallet_balance, se$ 
     elif wallet_balance < 10 and wallet_balance >= 0.03: 
       send_amount = str(0.01) 
       print ('Based on wallet balance of {} amount to send to self set to {} SLR') .format(wallet_balance, se$ 
     else: 
       send_amount = str(0.00001) 
       print ("*******WARNING: low wallet balance of {}SLR, send amount of {} may result in higher TX fees****$ 
     return send_amount 

當WALLET_BALANCE低於0.0005它執行sys.exit（），但後來並沒有真正停止，它似乎讀取了其餘的代碼並給出錯誤。我不清楚爲什麼如果程序退出，我會得到錯誤，如果我有回報，爲什麼它會造成問題。

Answer 1

您必須調用此函數。 替換sys.exit與sys.exit()

P.S.但使用這種非常特殊類型的應用程序關閉是非常糟糕的。嘗試使用return或smth（如異常）（這也是一個非常糟糕的想法，但在處理過程中比sys.exit（）更好，並且可以打印調試消息）。