Add log_argument

Signed-off-by: András Schmelczer <andras@schmelczer.dev>

example/predict_domain.py

@@ -1,15 +1,18 @@
 import re
 from typing import Dict, Iterable, List
 
+
 from config import model_key
 from models import DomainPrediction
 from preprocess import preprocess
 from sklearn.pipeline import Pipeline
 
-from good_ai import use_model
+from good_ai import use_model, log_argument, log_metric
 from good_ai.utilities.clean import clean
 
 
+@log_metric('text_length', calculate=lambda text: len(text))
+@log_argument('text', expected_type=str, validator=lambda t: len(t) > 0)
 @use_model(model_key, version="latest")
 def predict_domain(
     text: str, model: Pipeline, cut_off_probability: float = 0.2