python知识点

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1、在mac下，安装支持PIL库。

1.1 下载安装Combo Installer libpng & libjpeg: http://ethan.tira-thompson.com/Mac_OS_X_Ports.html

1.2 sudo easy_install pil

测试代码：

!/usr/bin/env python  import Imageimport osimport os.pathimport syspath = sys.argv[1]small_path = (path[:-1] if path[-1]=='/' else path) +'_small'if not os.path.exists(small_path):    os.mkdir(small_path)for root, dirs, files in os.walk(path):    for f in files:        fp = os.path.join(root, f)        img = Image.open(fp)        w, h = img.size        img.resize((w/4, h/4)).save(os.path.join(small_path, f), "JPEG")        print fp

2. Mac下安装MySQL驱动

参考：http://www.cnblogs.com/ken-zhang/archive/2011/05/14/2046211.html

a. sudo easy_install mysql-python

b. export DYLD_LIBRARY_PATH=/usr/local/mysql/lib/

3. Mac安装PyQt

使用brew进行安装

brew install pyqt

若importPyQt4失败，在.bash_profile添加export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH