demo.py does not work

I just tried to run the demo.py file in the console and this is the error it gave me.

RuntimeError: module compiled against API version 0xa but this version of numpy is 0x9
Traceback (most recent call last):
File "demo.py", line 10, in <module>
from my_utils import *
File "/home/treehouse/workspace/my_utils.py", line 298, in <module>
import matplotlib.pyplot as plt
File "/usr/local/pyenv/versions/3.5.0/lib/python3.5/site-packages/matplotlib/pyplot.py", line 29, in <module>
import matplotlib.colorbar
File "/usr/local/pyenv/versions/3.5.0/lib/python3.5/site-packages/matplotlib/colorbar.py", line 32, in <module>
import matplotlib.artist as martist
File "/usr/local/pyenv/versions/3.5.0/lib/python3.5/site-packages/matplotlib/artist.py", line 14, in <module>
from .transforms import (Bbox, IdentityTransform, TransformedBbox,
File "/usr/local/pyenv/versions/3.5.0/lib/python3.5/site-packages/matplotlib/transforms.py", line 39, in <module>
from matplotlib._path import (affine_transform, count_bboxes_overlapping_bbox,
ImportError: numpy.core.multiarray failed to import

Also, the SRC folder does not appear in my workspace.

Kat Chuang