Allow for DVC custom outs about zntrack HOT 1 CLOSED

from pytrack import PyTrack, DVC
from pytrack.core.parameter import PyTrackOption
import pandas as pd

class DVC_pd(PyTrackOption):
    def _get(self, instance, owner):
        name = self.get_name(instance)
        return pd.read_csv(f"{name}.csv")
    def _set(self, instance, value):
        name = self.get_name(instance)
        value.to_csv(f"{name}.csv")

@PyTrack(nb_name='CustomDVC.ipynb')
class HelloWorld:
    def __init__(self):
        self.df = DVC_pd()
        self.df_out = DVC.outs('df.csv')   # in the current version this is mandatory, so DVC knows about the file!
    def __call__(self, df):
        self.df = df
    def run(self):
        print('HelloWorld')