无法使用json.dumps（）在python中写字典到文件

Cannot write dictionary to file in python using json.dumps()

我从一个JSON转储中得到了一个响应，我正试图将它加载到一个log.txt文件中，但这不会打印出任何内容。

我的职能

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def get_customer_last_action_executed(self):
"""
Get the customer last action executed
By inputing the CustomerID
:return:
"""
payload ={'customerID': self.CustomerID}
if not self.CustomerID:
customer_id = raw_input("Please provide the customer ID:")
self.CustomerID = customer_id
# raise Exception('No customerID provided')

response = self.send_request(self.get_customer_last_action_executed_url + self.CustomerID,
json.dumps(payload),
"GET")

print response.url, response.status_code
print response, response.text, response.reason
if response:
print self.sucessful_msg
else:
print self.error_msg
with open('log.txt', 'w') as f:
json.dumps(payload, f)