This script is part of the TIMEleSS tools and is mean to calculate the mean of a series of diffraction images. The help output is below

timelessMeanFileSeries -h
usage: timelessMeanFileSeries -n sterm -f first -l last -o newfilename

Takes the mean of multiple EDF images Header parameters such as OmegaMin,
OmegaMax, Omega, OmegaPos are reset. This is part of the TIMEleSS project
http://timeless.texture.rocks

optional arguments:
  -h, --help            show this help message and exit
  -n STEM, --stem STEM  Stem for images files (required)
  -f FIRST, --first FIRST
                        First image number (required)
  -l LAST, --last LAST  Last image number (required)
  -o OUTPUT, --output OUTPUT
                        Name of output file
  -d NDIGITS, --ndigits NDIGITS
                        Number of digits for file number. Default is 4
  -e EXTENSION, --extension EXTENSION
                        File extension. Default is edf
  -t TIF, --tif TIF     Save in tiff instead of EDF if True. Default is False