Python爬虫错误之twisted.web.error.SchemeNotSupported: Unsupported scheme: b''

在使用scrapy爬虫时，出现了下面了的错误python Traceback (most recent call last): File "E:\project\venv\lib\site-packages\twisted\internet\defer.py", line 1416, in _inlineCallbacks result = result.throwExceptionI

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