matplotlib Code

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10 lines (6 with data), 211 Bytes

In [2]: x = rand(20); y = rand(20)
 
In [3]: lines = plot(x,y,'o')
 
In [4]: type(lines)        # plot always returns a list
Out[4]: <type 'list'>
 
In [5]: len(lines)         # even if it is length 1
Out[5]: 1