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                                            chua

metre_pixel_x,metre_pixel_y,coordinate,affine_correct_parameters=analyze_chessboard(image,affine_correct_flag) TypeError: cannot unpack non-iterable NoneType object

File "code2.py", line 228, in analyze_chessboard cv2.setMouseCallback(window_name1, click_and_crop) cv2.error: OpenCV(4.0.0) /io/opencv/modules/highgui/src/window_QT.cpp:714: error: (-27:Null pointer) NULL window handler in function 'cvSetMouseCallback' I'm getting this error

metre_pixel_x,metre_pixel_y,coordinate,affine_correct_parameters=analyze_chessboard(image,affine_correct_flag) TypeError: cannot unpack non-iterable NoneType object

![screenshot from 2019-02-06 14-37-27](https://user-images.githubusercontent.com/41266582/52324688-3ef25d80-2a1d-11e9-9c6f-6309160b7720.png) File "code2.py", line 226, in analyze_chessboard clone = image.copy() AttributeError: 'NoneType' object has no attribute 'copy' how to fix this error?

metre_pixel_x,metre_pixel_y,coordinate,affine_correct_parameters=analyze_chessboard(image,affine_correct_flag) TypeError: cannot unpack non-iterable NoneType object

`python code2.py -i1 /home/leisther/Downloads/Body-Measurement-using-Computer-Vision-master/Images/final_saket1.jpg -i2 /home/leisther/Downloads/Body-Measurement-using-Computer-Vision-master/Images/final_saket2.jpg -i3 /home/leisther/Downloads/Body-Measurement-using-Computer-Vision-master/Images/final_saket3.jpg -a "True"` I haven't solve the error `NULL window handler in function 'cvSetMouseCallback'` any idea of what to do with this?

ImportError: cannot import name 'parse_http_list'

can you help me? very urgent T.T