一、数字变量
执行结果：
Starting test: Test.Testsuit.baidutest
20171207 08:56:18.259 : INFO : ${var} = 3
20171207 08:56:18.259 : INFO : ${float} = 3.14
20171207 08:56:18.259 : INFO : ${float} = -0.0001
Ending test: Test.Testsuit.baidutest
二、布尔变量和None/null
执行结果：
Starting test: Test.Testsuit.baidutest
20171207 09:02:29.583 : INFO : ${test_true} = True
20171207 09:02:29.584 : INFO : ${test_false} = False
20171207 09:02:29.585 : INFO : ${test_None} = None
20171207 09:02:29.586 : INFO : ${test_null} = None
三、字符串、元组、list和字典
执行结果：
Starting test: Test.Testsuit.baidutest
20171207 09:07:35.673 : INFO : ${string} = test
20171207 09:07:35.673 : INFO : ${tuple} = (1, 3)
20171207 09:07:35.673 : INFO : ${list} = [u'1', u'yy']
20171207 09:07:35.673 : INFO : ${Dictionary} = {u'b': u'3', u'a': u'5'}
四、space和empty
执行结果：
Starting test: Test.Testsuit.baidutest
20171207 09:15:07.090 : INFO : ${test_space} =
20171207 09:15:07.090 : INFO : ${test_引号空格} = ' '
20171207 09:15:07.090 : INFO : ${test_4个space} =
20171207 09:15:07.090 : INFO : ${test_space} = " "
20171207 09:15:07.090 : INFO : ${Dictionary} =
五、特殊变量运算
执行结果：
Starting test: Test.Testsuit.baidutest
20171207 09:19:59.715 : INFO : ${数字变量运算} = 32
20171207 09:19:59.725 : INFO : ${布尔类型true运算} = 4
20171207 09:19:59.725 : INFO : ${布尔类型false运算} = 0
20171207 09:19:59.725 : INFO : ${space运算} =
六、Evaluate使用
函数释义：Evaluate是执行python表达式，并返回执行结果
