dm-ollamalib

Python package: helper functions to parse Ollama options from a string. Also show available options.

Nothing stellar, but these functionalities are somehow missing from the Ollama Python package.

Installation

If you haven't done so already, please install uv as this Python package and project manager basically makes all headaches of Python package management go away in an instant.

Simply do uv add dm-ollamalib and you are good to go.

In case you want to work with the GitHub repository (e.g., because testing out a branch or similar), do uv add git+https://github.com/DrMicrobit/dm-ollamalib.

Usage

Three function are provided:

1. two helper functions that return as string a list of Ollama options, their type, and if available a short description
2. a parsing function that parses a string and returns a dictionary compatible for use with Ollama

Functions to describe Ollama options

Both functions return a string.

Note

For name and type of the options, dm-ollamalib uses information directly from the Ollama Python library, which must be installed, e.g. via uv add ollama. That is, the strings returned are dynamically generated and adapted to the version of the Ollama Python library you have installed.

1. help_overview(): returns a string showing name and type of supported Ollama options. String will look like this:

                numa : bool
             num_ctx : int
           num_batch : int
...

2. help_long:(): returns a string showing name, type and description of supported Ollama options. The string will look like this:

numa : bool
This parameter seems to be new, or not described in docs as of January 2025.
dm_ollamalib does not know it, sorry.

num_ctx : int
Sets the size of the context window used to generate the next token.
(Default: 2048)
...

Important

As no description texts for options are present in the Ollama Python library, they were copied into dm-ollamalib by hand from descriptions either from the Ollama docs for model files on GitHub or the Ollama Python library package on PyPi. Note that some options have no description online at all, dm-ollamalib will tell you that.

Function to parse strings representing Ollama options

to_ollama_options() transforms a string with semicolon separated Ollama options to into an Ollama options object. It has a more rigorous type checking than Ollama, e.g., if one passes a float for a parameter expecting an int, this will be caught.

Arguments:

• params : str
  A string representing options for Ollama, separated by semicolon. E.g. "num_ctx=8092;temperature=0.8"
• oopt: ollama.Options | None An optional Ollama option object into which the new options from "params" would be parsed into.

Exceptions raised:

• ValueError for
  • unrecognised Ollama options
  • conversion errors of a string to required type (int, float, bool), e.g. "num_ctx=NotAnInt"
  • incomplete options (e.g. "num_ctx=" or "=8092")
  • unknown Ollama options
• RuntimeError
  • if Ollama Python library has unexpected parameter types not handled by this function (should not happen, except if Ollama devs implemented something new)

Usage examples

from dm_ollamalib.parse_options import help_long, help_overview, to_ollama_options

print(help_overview())
print(help_long())

print(to_ollama_options("top_p=0.9;temperature=0.8"))

The first two lines will print the generated help texts for the options present in the Ollama Python package. The two subsequent lines show how to parse options from one or several strings coming from, e.g. command line.

The dictionary returned by to_ollama_options() can be used directly in calls to Ollama. E.g.

import ollama
from dm_ollamalib.optionhelper import to_ollama_options

op = to_ollama_options("top_p=0.9;temperature=0.8")
ostream = ollama.chat(
    model="llama3.1",
    options=op,          # the options parsed from string
    ...
)

Important

For the code above to work, you need to have (1) Ollama installed and running, the llama3.1 model installed in Ollama (ollama pull llama3.1), and (3) your Python project needs to have the Ollama Python module installed via, e.g., uv add ollama.

Alternatively, the following is also a valid use case

import ollama
from dm_ollamalib.optionhelper import to_ollama_options

op: ollama.Options = ollama.Options()

for s in ["top_p=0.9", "temperature=0.8"]
  op = to_ollama_options(s, op)

ostream = ollama.chat(
    model="llama3.1",
    options=op,          # the options parsed from all strings
    ...
)

Notes

The GitHub repository comes with all files I currently use for Python development across multiple platforms. Notably:

• configuration of the Python environment via uv: pyproject.toml and uv.lock
• configuration for linter and code formatter ruff: ruff.toml
• configuration for pylint: .pylintrc
• git ignore files: .gitignore
• configuration for pre-commit: .pre-commit-config.yaml. The script used to check git commit summary message is in devsupport/check_commitsummary.py
• configuration for VSCode editor: .vscode directory