macos上安装mysqldb，EnvironmentError:mysql:$ sudo python setup.py clean $ sudo python setup.py build $ sudo python setup.py install $ export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH $python import MySQLdb /Library/Python/2.7/site-packages/MySQL_python-1.2.3-py2.7-m