clustering.py problem

The file clustering.py has some lines of code:
```
def __init__(self, geo_locs_, k_):
        self.geo_locations = geo_locs_
        self.k = k_
        self.clusters = []  #clusters of nodes
        self.means = []     #means of clusters
        self.debug = True  #debug flag
```
self.clusters = []   
the clusters is a list.
Should the self.clusters is a dict? 

