sudo but sudon't

sudo.sh

$ which python
/usr/bin/python
$ sudo which python
/usr/bin/python
$ python -c "import cairo; print cairo.version"
1.10.0
$ sudo python -c "import cairo; print cairo.version"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python2.7/site-packages/cairo/__init__.py", line 1, in <module>
    from _cairo import *
ImportError: libcairo.so.2: cannot open shared object file: No such file or directory