NameError: name 'CIMultiDict' is not defined

[gMan1990]

Describe the bug

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/sanic/app.py", line 985, in handle_request
    request, response
  File "/usr/local/lib64/python3.6/site-packages/spf/framework.py", line 653, in _run_response_middleware_18_12
    _response = await _response
  File "/usr/local/lib64/python3.6/site-packages/sanic_cors/extension.py", line 267, in unapplied_cors_response_middleware
    set_cors_headers(req, resp, context, res_options)
  File "/usr/local/lib64/python3.6/site-packages/sanic_cors/core.py", line 254, in set_cors_headers
    headers_to_set = get_cors_headers(options, req.headers, req.method)
  File "/usr/local/lib64/python3.6/site-packages/sanic_cors/core.py", line 175, in get_cors_headers
    headers = CIMultiDict()
NameError: name 'CIMultiDict' is not defined

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[gMan1990]

see ashleysommer/sanic-cors#34

[gMan1990]

• scylla/requirements.txt

sanic==19.6.3
sanic-cors==0.9.9

• https://github.com/ashleysommer/sanic-cors/blob/0.9.9/sanic_cors/core.py

try:
    from sanic.compat import Header
except ImportError:
    try:
        from sanic.server import CIMultiDict
    except ImportError:
        from sanic.server import CIDict as CIMultiDict

• https://github.com/huge-success/sanic/blob/v19.6.3/sanic/compat.py
  class Header(CIMultiDict):

---

所以就是from sanic.compat import Header不会ImportError，然后就是NameError: name 'CIMultiDict' is not defined了。
这 code review 有木有问题？

[hittimes]

docker 启动也有这个错误 NameError: name 'CIMultiDict' is not defined