Please help in Python. I need help on writing a function for the following task in Python 3.6. Please help. Thank You!

The 9 images can be download from this link and are in a zip folder called pesky_tourist: https://expirebox.com/download/0bc535cc2f10dc5aa621fc5e7c4a71d2.html

Background Analyzing a series of images of the (exact) same location at different times is known as temporal processing. (This is opposed to spatial processing which analyzes one image and focuses on each pixel's neighbors.) One example of temporal filter is a median filter. Given several images, a temporal me- dian filter takes a list of pixel channel values at each coordinate and calculates the median This removes outliers and can act to subtract unwanted elements from an image. In general, to calculate the median of a list of numbers of odd length, you sort the list, calculate the middle location, and return the value at that middle location. If we have a list of length n, where n is odd, the location of the middle value is at: For example, if we have the numbers 2, 4, 6, 237, 1, we sort the numbers to get 1, 2, 4, 6, 237. The list is of length 5, so the middle value is located in the third position, which is the number 4. (Note: Given that Python lists are indexed at e, we need to substract one from the calculated middle location in our program.)