This program is based Larch package. Please install Larch first:
pip install larch
Then download the folder \src into your PC and copy the data to \src\test folder.
The file should inlculde two columns of photon energy (E) and absorption ($\mu(E)$). After input the file name, material structure and element in "INPUT" and then run the program and click run button, the first-shell fits and the whole processing figures will display with the explanation words. Multiple files can be input here.
If you prefer to use GUI, please input the file name in "GUI" and press enter. GUI can only handle one file each time.