Double AA questions

• Key to maxima of dictionary in python
• Python max and min functions - greedy? [duplicate]
• Appending a list to itself in Python
• How can I turn a flat list into a 2D array in python?
• Plotting points in python
• Combining NumPy arrays
• Comparing two numpy arrays to each other
• Modular addition in python
• python -- measuring pixel brightness
• Turning a list into nested lists in python

Double AA answers