Python：通过变量传递url不起作用

Python: passing url through variable not working

下面的代码是用python连接到hp qc alm的，当对值进行硬编码时，它会按预期工作：

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from win32com.client import Dispatch
class QC_ConnectorClass(object):
def __init__(self):
print("class init")

def ConnectToQC(self):
#HP QC OTA methods
self.TD = Dispatch("TDApiOle80.TDConnection.1")
self.TD.InitConnectionEx("http://hpqcurl.org")
self.TD.Login("UName","Pwd")
self.TD.Connect("Domain","project")
if self.TD.Connected == True:
print("Logged in")
self.TD.Logout();
print("Logged out")
self.TD.ReleaseConnection();
else:
print("Login failed")

将hp qc url传递到变量like时

1	hpQCURL="http://hpqcurl.org"

然后像这样传递变量：

self.TD.InitConnectionEx(hpQCURL)

我收到以下错误：

1 2	File"<COMObject TDApiOle80.TDConnection.1>", line 2, in InitConnectionEx pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, None, None, None, 0, -2147023174), None)