Sort a multidimensional dictionary by the first column

Question

I have downloaded this text file as a dict in python:

`3, 0.5, 0.5, 10

 3, 0.5, 0.5, 20

 1, 0.1, 0.2, 73

 1, 0.11, 0.1, 101

 2, 0.23, 0.01, 17

 2, 0.12,