Stoner
Compresses all empty groups from the root up until the first non-empty group is located.
fldr (BaseFolder) – DataFolder instance when not a bound method.
base (str,None) – default None
key (str) – default “.”
keep_terminal (gool) – default False
A copy of the now flattened DatFolder
DataFolder.compress()
DataFolder.clear
DataFolder.concatenate