msdparser

msdparser

A robust & lightning fast MSD parser for Python. MSD is the underlying file format for the SM and SSC simfile formats used by StepMania, as well as a few older formats like DWI.

Full documentation can be found on Read the Docs.

Features

• Speed-optimized lexer & low-overhead parser
• Support for escape sequences by default
• Strict & lenient parse modes

Installation

msdparser is available on PyPI:

pip install msdparser

Quickstart

parse_msd takes a named file or string argument and yields MSDParameter instances:

>>> msd_data = """
... #VERSION:0.83;
... #TITLE:Springtime;
... #SUBTITLE:;
... #ARTIST:Kommisar;
... """
>>> from msdparser import parse_msd
>>> for param in parse_msd(string=msd_data):
...         print(
...             "key=" + repr(param.key),
...             "value=" + repr(param.value),
...         )
...
key='VERSION' value='0.83'
key='TITLE' value='Springtime'
key='SUBTITLE' value=''
key='ARTIST' value='Kommisar'

MSDParameter instances stringify back to MSD. They can be created from a sequence of strings, typically the key and value:

>>> from msdparser import MSDParameter
>>> pairs = [('TITLE', 'Springtime'), ('ARTIST', 'Kommisar')]
>>> for key, value in pairs:
...     print(str(MSDParameter([key, value])))
...
#TITLE:Springtime;
#ARTIST:Kommisar;

Prefer to use MSDParameter over interpolating the key/value pairs between #:; characters yourself. The str() implementation inserts escape sequences where required, preventing generation of invalid MSD.

Developing

msdparser uses Pipenv for dependency management. Activate the environment:

pipenv shell

To run the unit tests:

py -m unittest

To build the documentation:

docs/make html