"import random" Odd Behavior on OSX install VPython v.3.1

The problem was with the next line of code.  I should have used 'import visual.graph' rather than 'from visual.graph import *'
Can anyone explain what the difference between the two calls is?  Also why does visual.graph have visual.graph.random?

The Problem
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import random
from visual.graph import *  #bad idea 

# imports random from numpy directory
# visual.graph. does have a .random 
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Solution:

import visual.graph

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