如何使用python验证插槽数据在Alexa中是数字

Question

所以我的Alexa技能要求发票金额。

用户应该说"我的发票是一百美元"。

我的示例语句是"我的发票是 {invoiceAmount} 美元"，其中 {invoiceAmount} 是 Amazon.NUMBER 插槽

如果用户说一个数字，一切正常。 但是，如果他们不这样做，那么代码就会爆炸，Alexa 就会退出我的技能。 例如，如果用户说"我的发票是棒球美元"。

这是我处理此意图的代码：

def set_amount_in_session(intent, session):
card_title = "Set Invoice Amount"
should_end_session = False
if 'invoiceAmount' in intent['slots']:
if intent['slots']['invoiceAmount']['value'] is not None:
invoice_amount = intent['slots']['invoiceAmount']['value']
try:
val = int(invoice_amount)
except ValueError:
val = 0
if val != 0:
session['attributes']['invoiceAmount'] = int(invoice_amount)
speech_output = "The invoice amount is " + str(invoice_amount) + " dollars. "
card_output =   "Invoice Amount $" + str(invoice_amount)
reprompt_text = "Please tell me the terms of the invoice."
else:
speech_output = "I'm not sure what the invoice amount is. " 
"Please try again."
card_output =   "I'm not sure what the invoice amount is. " 
"Please try again."
reprompt_text = "I'm not sure what the invoice amount is. " 
"Please tell me the amount of the invoice you wish to factor by saying, for example, " 
"my invoice is for one hundred and fifty dollars."
else:
speech_output = "I'm not sure what the invoice amount is. " 
"Please try again."
card_output =   "I'm not sure what the invoice amount is. " 
"Please try again."
reprompt_text = "I'm not sure what the invoice amount is. " 
"Please tell me the amount of the invoice you wish to factor by saying, for example, " 
"my invoice is for one hundred and fifty dollars."
else:
speech_output = "I'm not sure what the invoice amount is. " 
"Please try again."
card_output =   "I'm not sure what the invoice amount is. " 
"Please try again."
reprompt_text = "I'm not sure what the invoice amount is. " 
"Please tell me the amount of the invoice you wish to factor by saying, for example, " 
"my invoice is for one hundred and fifty dollars."
return build_response(session['attributes'], build_speechlet_response(
card_title, speech_output, card_output, reprompt_text, should_end_session))

当我在亚马逊开发人员控制台中对其进行测试时，此代码运行良好，但在我的 Echo Dot 上失败。

如果我说"我的发票是一百块棒球美元"，它能够处理回复并说它不确定发票金额是多少。

如果我说"我的发票是棒球一百美元"，它实际上忽略了"棒球"并将发票金额设置为 100 美元，我很好。

但是，如果我说">

我的发票是棒球美元"，它会失败并说"请求的技能响应有问题"，然后关闭技能。

Answer 1

所以我想通了。

当我说"我的发票是一百美元"时，我得到：

"request": {
"type": "IntentRequest",
"requestId": "EdwRequestId.386d4fe9-dc04-4376-8e30-dec3205484fe",
"locale": "en-US",
"timestamp": "2017-08-08T14:59:43Z",
"intent": {
"name": "WhatIsInvoiceAmount",
"slots": {
"invoiceAmount": {
"name": "invoiceAmount",
"value": "100"
}
}
}
}

这当然是有效的值，因此可以正确处理。

当我说"我的发票是一百块棒球美元"时，我得到：

"request": {
"type": "IntentRequest",
"requestId": "EdwRequestId.c1b4a1d0-4949-4247-b326-a582ce4826b4",
"locale": "en-US",
"timestamp": "2017-08-08T15:01:09Z",
"intent": {
"name": "WhatIsInvoiceAmount",
"slots": {
"invoiceAmount": {
"name": "invoiceAmount",
"value": "?"
}
}
}
}

我不确定这个值是空的还是不是整数，但由于我检查了这两种情况，所以这不是问题

问题是，当我说"我的发票是棒球美元"时，发票Amoutn插槽没有价值：

"request": {
"type": "IntentRequest",
"requestId": "EdwRequestId.a046d29b-581c-484a-8879-abe979ec6286",
"locale": "en-US",
"timestamp": "2017-08-08T14:51:36Z",
"intent": {
"name": "WhatIsInvoiceAmount",
"slots": {
"invoiceAmount": {
"name": "invoiceAmount"
}
}
}
}

显然，没有"值">

与没有空的"值"不同。 所以我不得不在我的代码中添加一个检查，以查看是否有值。 所以这是我的新代码，现在还检查是否有值：

if 'invoiceAmount' in intent['slots']:
if 'value' in intent['slots']['invoiceAmount']:
if intent['slots']['invoiceAmount']['value'] is not None:
invoice_amount = intent['slots']['invoiceAmount']['value']
try:
val = int(invoice_amount)
except ValueError:
val = 0
if val != 0:
NOW I HAVE A VALID VALUE AND CAN EXECUTE MY CODE

通过此更改，我似乎解决了我的问题。