我试图在我的Raspberry Pi上安装Python 3的matplotlib。这是我尝试导入模块时遇到的错误：
Traceback (most recent call last):
File "/home/pi/GPIOtests/Accel.py", line 6, in <module>
import matplotlib.pyplot as plt
File "/usr/local/lib/python3.2/dist-packages/matplotlib/pyplot.py", line 28, in <module>
import matplotlib.colorbar
File "/usr/local/lib/python3.2/dist-packages/matplotlib/colorbar.py", line 32, in <module>
import matplotlib.artist as martist
File "/usr/local/lib/python3.2/dist-packages/matplotlib/artist.py", line 13, in <module>
from .transforms import (Bbox, IdentityTransform, TransformedBbox,
File "/usr/local/lib/python3.2/dist-packages/matplotlib/transforms.py", line 39, in <module>
from matplotlib._path import (affine_transform, count_bboxes_overlapping_bbox,
ImportError: /usr/local/lib/python3.2/dist-packages/matplotlib/_path.so: file too short
我做错了什么？