Does anybody know how can I get the offset in an executable file from an address in #Ghidra (with Python or Java)?

Maybe @buherator ?

@joxean I don't have a tested answer, but I think the solution will be around Memory.getAddressSourceInfo():

https://ghidra.re/ghidra_docs/api/ghidra/program/model/mem/Memory.html#getAddressSourceInfo(ghidra.program.model.address.Address)

What is unclear to me is how the resulting AddressSourceInfo objects are created as Loaders (plugins that map file contents to Memory Blocks for Ghidra) don't necessarily provide source information when creating a mapping (see e.g. the createUninitializedBlock() method).

Edit: You can get the Memory object from currentProgram.getMemory()

@buherator Yep. BTW, Ryan Kurtz already answered me:

program.getMemory().getAddressSourceInfo(addr).getFileOffset()

@joxean @buherator seems I bothered my ex-colleagues for this info a little too late!