force int cast

[ostix360]

.0 in the config file for the lora_alpha param
and I got this error

fout.write(struct.pack("ii", int(params["r"]), params["lora_alpha"]))
struct.error: required argument is not an integer

I just cast

[prusnak]

Shouldn't we fix the config file instead rather than silencing this bug?

[ostix360]

If I have this error with ist downloading the Lora config from Hugging face so I think it's not the only one to have a .0 for the param's Lora-alpha
And the patch cost nothing in terms of performance

[slaren]

The mistake here seems to be assuming that lora_alpha is an integer, if it is actually a float. In that case, it should be exported as a float as well. At the very least, we need to check that int(lora_alpha) == lora_alpha.

[ostix360]

Indeed lora_aplha can be a float value but if this equality int(lora_alpha) == lora_alpha is not true what are supposed to write in the file?
In the major case alpha Lora is an integer but if it's not and we write it as a float value on the ggml file, does it change something when it injected to the the model we run it in inference?

[prusnak]

The documentation here tells that lora_alpha is an int: https://opendelta.readthedocs.io/en/latest/modules/deltas.html

I think there are two ways how to proceed:

1. use this PR, but add assert int(lora_alpha) == lora_alpha to the conversion script
2. change lora_alpha from int to double in both convert-lora-to-ggml.py and llama.cpp

Option 2 has two subvariants:
a. do the change and do not bump the version
b. do the change and bump the version

Which way do you want to go @slaren? 1, 2a or 2b?

[slaren]

If the documentation says that it is an int, just go with option 1 as a sanity check and be done with it.

[prusnak]

Note to self: don't try to write valid code as a GitHub suggestion on a phone 😅