局部變量「服務器的分配

def websvc(currency): 
    db = MySQLdb.connect("localhost", "root", "aqw", "PFE_Project") 
    cursor = db.cursor() 
    sql = "SELECT * FROM myform_composantsserveur" 

    try: 
     cursor.execute(sql) 
     results = cursor.fetchall() 
     currency_in = currency 
     req = urllib2.urlopen('http://rate-exchange.appspot.com/currency?from=USD&to=%s') % (currency_in) 
     req1 = req.read() 
     rate = int(req1['rate']) 
     # rate = 0.77112893299999996 

     servers = [] 
     for row in results: 
      result = {} 
      result['1'] = row[1] 
      result['3'] = int(row[2]) 
      result['4'] = int(row[3]) 
      result['5'] = int(row[4]) 
      result['6'] = row[5] 
      result['7'] = int(row[6]) 
      result['8'] = row[7] 
      result['9'] = row[8] 
      p = rate * calculations_metric (int(row[2]), int(row[3]), int(row[4]), int(row[6]), row[7]) 
      result['2'] = p 
      keys = result.keys() 
      keys.sort() 
      servers.append(result) 

    except: 
     print "Error: unable to fetch data" 
    db.close() 
    return servers

之前引用但我有這個錯誤而編譯代碼：局部變量「服務器的分配

異常類型：UnboundLocalError

異常值：賦值之前引用局部變量「服務器」

異常位置：/ home/amine/PFE目錄/ mysite1/myform/webservice.py in websvc，第43行Python可執行文件：/usr/bin/python2.7

這個代碼正常工作之前，我在此功能

來源

2013-03-14 Imoum

什麼線是錯誤的？ – interjay 2013-03-14 09:40:39

添加完整的錯誤以及FUNC代碼與該錯誤 – 2013-03-14 09:42:29

鐳石光電線「返回服務器」中提到 – Imoum 2013-03-14 09:44:10

您的代碼不能添加參數來達到服務器的初始化，這就是爲什麼你得到錯誤。只需在try..except之前移動初始化即可。改變這種方式：

def websvc(currency): 
    db = MySQLdb.connect("localhost", "root", "aqw", "PFE_Project") 
    cursor = db.cursor() 
    sql = "SELECT * FROM myform_composantsserveur" 
    servers = [] 

    try: 
     cursor.execute(sql) 
     results = cursor.fetchall() 
     currency_in = currency 
     req = urllib2.urlopen('http://rate-exchange.appspot.com/currency?from=USD&to=%s') % (currency_in) 
     req1 = req.read() 
     rate = int(req1['rate']) 
     # rate = 0.77112893299999996 

     for row in results: 
      result = {} 
      result['1'] = row[1] 
      result['3'] = int(row[2]) 
      result['4'] = int(row[3]) 
      result['5'] = int(row[4]) 
      result['6'] = row[5] 
      result['7'] = int(row[6]) 
      result['8'] = row[7] 
      result['9'] = row[8] 
      p = rate * calculations_metric (int(row[2]), int(row[3]), int(row[4]), int(row[6]), row[7]) 
      result['2'] = p 
      keys = result.keys() 
      keys.sort() 
      servers.append(result) 

    except: 
     print "Error: unable to fetch data" 
    db.close() 
    return servers

來源

2013-03-14 10:11:09

我看到了問題，現在你已經編輯它添加缺少的部分。這是異常處理程序。

如果在try之後和servers=[]之前有錯誤，它將跳轉到except子句，然後看到return servers並失敗。

您可能需要使用list()，而是採用了dict()來模擬列表...

來源

2013-03-14 10:12:09 gecko

局部變量「服務器的分配

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