Question

我有一个奇怪的问题。我在excel中创建了一个vba代码，它调用了一个python代码，该代码从excel表中获取信息并将其放入数据库中。昨天没有问题。今天我启动计算机并尝试了vba代码，并在python文件中出错。

错误：

testchipnr =  TC104
Traceback (most recent call last):
testchipID =  108
File "S:/3 - Technical/13 - Reports & Templates/13 - Description/DescriptionToDatabase/DescriptionToDatabase.py", line 40, in <module>
TestchipID = cursorOpenShark.fetchone()[0] # Fetch a single row using fetchone() method and store the result in a variable., the [0] fetches only 1 value
TypeError: 'NoneType' object has no attribute '__getitem__'

奇怪的是数据库中有一个值 - ＆gt; testchipID ...

我的代码：

#get the testchipID and the testchipname
testchipNr = sheet.cell(7, 0).value # Get the testchipnr
print "testchipnr = ", testchipNr
queryTestchipID = """SELECT testchipid FROM testchip WHERE nr = '%s'""" %(testchipNr)
cursorOpenShark.execute(queryTestchipID)
print "testchipID = ", cursorOpenShark.fetchone()[0]
TestchipID = cursorOpenShark.fetchone()[0] # Fetch a single row using fetchone() method and store the result in a variable., the [0] fetches only 1 value

Answer 1

正如你所说，它工作正常，但现在却没有，我能想到的唯一原因是当你的查询返回零结果时。

查看您的代码，如果您的查询只返回一个结果，那么它将打印结果，并且当您下次调用cursorOpenShark.fetchone()以存储在TestchipID时，它将返回None

相反，您可以尝试以下代码

#get the testchipID and the testchipname
testchipNr = sheet.cell(7, 0).value # Get the testchipnr
print "testchipnr = ", testchipNr
queryTestchipID = """SELECT testchipid FROM testchip WHERE nr = '%s'""" %(testchipNr)
cursorOpenShark.execute(queryTestchipID)
TestchipID = cursorOpenShark.fetchone()[0] # Fetch a single row using fetchone() method and store the result in a variable., the [0] fetches only 1 value
if TestchipID:
    print "testchipID = ", TestchipID[0]
else:
    print "Returned nothing"

让我知道这是否有效。

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1 个答案: