wrong file loading by separate_file function

[Ir0098]

The function separate_file employs fetch function to fetch files in a given path (i.e., savedir). The current version is okay unless sperate_file tries to fetch the new filename that already exists in savedir. This is already addressed by overwrite in the fetch; however, this can not be controlled within separate_file; then, please provide an access to overwrite within seperate_file:

---

def separate_file(self, path, savedir=".", overwrite=False):
...
path = fetch(fl, source=source, savedir=savedir, overwrite)

---

This problem becomes challenging in case of a huge dataset having plenty of similar filenames stored at different directories; then the user can simply set overwrite = True to avoid such a serious problem.

Thanks,

[anautsch]

relates to the #1303 complex

A suitable PR on this would be neat.