Aske Doerge questions

Aske Doerge answers

• OpenCV HOG Descriptor Parameters
• understanding python xgboost cv
• Fastest way to find which of two lists of columns of each row is true in a pandas dataframe
• Start python debugger in oldest stack frame after an exception occurs
• Diffie-Hellman (to RC4) with Wincrypt From Python
• tf.matmul doesn't works as expected