SystemError: returned a result with an error set

SystemError: <class ‘cv2.cascadeclassifier’=””> returned a result with an error set

penCV Error: Parsing error (lbpcascade_animeface.xml(6685): Preliminary end of the stream) in icvXMLParseTag, file D:\Build\OpenCV\opencv-3.4.0\modules\core\src\persistence.cpp, line 2681
cv2.error: D:\Build\OpenCV\opencv-3.4.0\modules\core\src\persistence.cpp:2681: error: (-212) lbpcascade_animeface.xml(6685): Preliminary end of the stream in function icvXMLParseTag


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "head.py", line 32, in 
    detect(filename)
  File "head.py", line 10, in detect
    cascade = cv2.CascadeClassifier(cascade_file)
SystemError: <class 'cv2.cascadeclassifier'=""> returned a result with an error set

解决办法：

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