不知道为啥会报这个错，是解析 json 数据问题么

================================== FAILURES ===================================
________________________ TestMainExcel.test_mainExcel _________________________

self =

@allure.title('测试标题')
@allure.testcase('测试地址：https://www.imooc.com')
def test_mainExcel(self):
excelData = GetData(file_name, sheet_id)
rows_count = excelData.get_case_lines()
for i in range(1, rows_count):
is_run = excelData.get_is_run(i)
if is_run:
url = excelData.get_request_url(i)
method = excelData.get_request_method(i)
request_data = json.loads(excelData.get_request_data(i))
header = json.loads(handle_ini.get_value('headerDefault', 'header'))
expect = excelData.get_expcet_data(i)
with allure.step('接口请求信息：'):
allure.attach('接口名：{},接口请求地址：{}，接口请求方式：{}，接口请求参数：{}'.format(excelData.get_name(i), url, method, request_data))
res = baseRequest.run_main(method, url, request_data, header)

res_data = res.json()

test_case\testRequest\test_mainExcel.py:40:

---

venv\lib\site-packages\requests\models.py:898: in json
return complexjson.loads(self.text, **kwargs)
E:\python3.6.2\lib\json_init_.py:354: in loads
return _default_decoder.decode(s)
E:\python3.6.2\lib\json\decoder.py:339: in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())

---

self =
s = 'jsonpcallback({"result":0,"data":"","msg":"\u6210\u529f"})', idx = 0

def raw_decode(self, s, idx=0):
"""Decode a JSON document from s (a str beginning with
a JSON document) and return a 2-tuple of the Python
representation and the index in s where the document ended.

This can be used to decode a JSON document from a string that may
have extraneous data at the end.

"""
try:
obj, end = self.scan_once(s, idx)
except StopIteration as err:

raise JSONDecodeError("Expecting value", s, err.value) from None
E json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

E:\python3.6.2\lib\json\decoder.py:357: JSONDecodeError
=========================== short test summary info ===========================
FAILED test_case/testRequest/test_mainExcel.py::TestMainExcel::test_mainExcel
=================== 1 failed, 4 passed in 217.25s (0:03:37) ===================

Process finished with exit code 0

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