Update readme

README.md

@@ -9,9 +9,11 @@ There are _two_ packages included in this repository: `pidplots` and `pidml`.  T
 ## Weight values
 
 Here are the values of the weights, trained on ParticleGun data from
-release-05-02-06 using a pion weight of beta = 0.1.
+release-05-02-06 using a pion weight of beta = 0.1. (Note: this is valid
+Python, so you can copy-paste this into your notebook, assume `numpy` is
+imported as `np`.)
 
-```
+```python
 wgt = np.array(
 #     SVD         CDC         TOP         ARICH       ECL         KLM
     [[0.80897236, 2.2702134 , 0.43437374, 0.5949359 , 2.4642045 , 0.15824968], # e