ZHU questions

• Why does Python `**` use for exponentiation instead of the `^` operator? [duplicate]
• Elementwise multiplication of NumPy arrays of different shapes
• RTree: Count points in the neighbourhoods within each point of another set of points
• How to set size/rotate image in jekyll?
• Perceptron learning algorithm doesn't work
• Why doesn't '%matplotlib inline' work in python script?

ZHU answers