Python執行web接口測試用例時，POST請求返回報文報“{"msg":"JSON parse error: Cannot construct instance of `xxxxx` }

使用Python+unittest完成web接口測試用例，調用post方法是，一直返回錯誤報文：

{"msg":"JSON parse error: Cannot construct instance of `xxxxx` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value (''); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `xxxxx` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('')\n at [Source: (PushbackInputStream); line: 1, column: 1]","code":500,"data":null

 

 

 

糾結了很久，網上也查詢了，也請教了Java開發，結果發現是post請求的參數寫錯導致，心中頓時幾千萬個那什么呼嘯而過，這個問題的原因也太簡單了，也是因為自己對各個請求方法的傳參不夠熟練導致（但是這個錯誤提示也夠奇葩的，直接提示我參數傳遞錯誤就行呀。。。）

錯誤的請求樣例：

正確的請求樣例：