无法赶上连接pymysql

@classmethod 
def getSwDataPass(self, uid, pw, dbname='swdata', _count=0): 
    result = None 

    if dbname == '': 
     dbname = input('Could not find a database by the name swdata. Please provide the database name : ') 
     if dbname == '' or dbname is None: 
      print('There was a problem connecting to the database...exiting') 
      sys.exit() 
    try: 
     connection = pymysql.connect(host='localhost', 
            user=uid, 
            password=pw, 
            db='sw_config', 
            port=5002, 
            cursorclass=pymysql.cursors.DictCursor) 

    except pymysql.err.OperationalError: 
     print('Unable to make a connection to the mysql database. Please provide your swdata credentials') 
     credentials = self.getrootpass(True) 
     result = {"uid": credentials[0], "pwd": credentials[1]} 
     continue 

    if result is None: 
     try: 
      with connection.cursor() as cursor: 
       cursor.execute("select uid, pwd, dbname from sw_databases where dbname = '{0}'".format(dbname)) 
       result = cursor.fetchone() 
       if result is None: 
        connection.close() 
        if _count < 2: 
         self.getSwDataPass(uid, pw, '', _count + 1) 

     finally: 
      connection.close() 
    return result

例外，当连接到MySQL我输入凭据无效，我得到一个未处理的异常，并且程序用一个错误无法赶上连接pymysql

Traceback (most recent call last): 
    File "buildzapp.py", line 248, in <module> 
    BuildZapp.main() 
    File "buildzapp.py", line 96, in main 
    zapp = BuildZapp(manifest, pw, uid, dbname) 
    File "buildzapp.py", line 51, in __init__ 
    swdata_credentials = Utilities.getSwDataPass(self.conf_uid, self.conf_pw) 
    File "C:\zapp builder\utilities.py", line 60, in getSwDataPass 
    cursorclass=pymysql.cursors.DictCursor) 
    File "C:\Python27\Lib\site-packages\pymysql\__init__.py", line 88, in Connect 
    return Connection(*args, **kwargs) 
    File "C:\Python27\Lib\site-packages\pymysql\connections.py", line 689, in __init__ 
    self.connect() 
    File "C:\Python27\Lib\site-packages\pymysql\connections.py", line 907, in connect 
    self._request_authentication() 
    File "C:\Python27\Lib\site-packages\pymysql\connections.py", line 1115, in _request_authentication 
    auth_packet = self._read_packet() 
    File "C:\Python27\Lib\site-packages\pymysql\connections.py", line 982, in _read_packet 
    packet.check_error() 
    File "C:\Python27\Lib\site-packages\pymysql\connections.py", line 394, in check_error 
    err.raise_mysql_exception(self._data) 
    File "C:\Python27\Lib\site-packages\pymysql\err.py", line 120, in raise_mysql_exception 
    _check_mysql_exception(errinfo) 
    File "C:\Python27\Lib\site-packages\pymysql\err.py", line 112, in _check_mysql_exception 
    raise errorclass(errno, errorvalue) 
pymysql.err.OperationalError: (1045, u"Access denied for user 'root'@'localhost' (using password: YES)")

我试过事件只是一个开放的except:退出只是为了测试我是否抓住了错误的错误，没有骰子。

来源

2016-08-12 richbai90

尝试调用函数之前指定pymysql.cursors.DictCursor给一个变量：

try: 
    cursor = pymysql.cursors.DictCursor 
    connection = pymysql.connect(host='localhost', 
           user=uid, 
           password=pw, 
           db='sw_config', 
           port=5002, 
           cursorclass=cursor)

来源

2016-08-12 15:27:07 Flippym

这是关键。我想知道为什么，你能否提供有关导致此行为的洞察？ – richbai90

@ richbai90，它可能是一个错误，或者它可能与代码的使用方式有关。我不知道，但如果你想了解原因，你应该问模块开发人员。 – Flippym

无法赶上连接pymysql

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