python 虎口里拔牙 括号中取东西

怎么获取 [ ]中的字符串或者数字

http://stackoverflow.com/questions/4894069/python-regex-help-return-text-between-parenthesis

例程：

[[ 1.1916991]]
[[ 0.87677399]]
[[ 0.69110944]]
[[ 0.65589256]]

def readTxtToList():
	fp_read = open("readTest.txt", "r")
	readNum = []

	for line in fp_read:
		readNum = line[line.find("[")+1:line.find("]")]
		print readNum
		readNum = readNum[readNum.find("[")+1:]
		print readNum

	fp_read.close()

readTxtToList()