Although in Sitepackages, not importable

I installed basemap the following:

Download the source from here:

http://sourceforge.net/projects/matplotlib/files/matplotlib-toolkits/

Follow the instructions:

cd geos-3.3.3
export GEOS_DIR=/usr/local
./configure --prefix=$GEOS_DIR
make; make install

Then I went on the PROJ4 website http://trac.osgeo.org/proj/
Downloaded vers 4.9.1

./configure
make
make install

Then back into the basemap folder:

sudo python setup.py install

No error messages during that process.
However,

from mpl_toolkits.basemap import Basemap yields
"No module named basemap"

I checked my python 2.7 folder under

 /Library/Python/2.7

There is folder "mpl_toolkits" which contains a folder basemap.
Why is it not importing?

使用 issue 中所示的安装命令和 Python 2.7 路径，重现报告的 from mpl_toolkits.basemap import Basemap 失败。检查 /Library/Python/2.7/mpl_toolkits/basemap 和当前解释器的导入路径；确定已安装的软件包无法导入的原因，并记录经过验证的修复方法后，即视为完成。