问题描述：Traceback (most recent call last):
File "./st-draw", line 7, in <module>
import cairo
ImportError: No module named cairo
问题解决：
apt-get install python-cairo
sudo apt-get install cairocffi
Ubuntu 16.04执行st-draw *.bin出现No module named cairo
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心之所向，素履所往；生如逆旅，一苇以航。
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