python 列出安装的包

参考自：http://stackoverflow.com/questions/739993/how-can-i-get-a-list-of-locally-installed-python-modules


方法1：

import sys
import time

print(sys.version)

try: 
	import pip
	ips=pip.get_installed_distributions()
	ipss=sorted(["%s:\t%s" % (i.key, i.version) for i in ips]);
	for ii in ipss:
		print(ii);
except:
	print("NO pip")

方法2：

help('modules')