'''
1 Install Lettuce_webdriver
1 download address: https://pypi.python.org/pypi/Lettuce_webdriver.
2 install by pip
2 Install nose
1 download address: https://pypi.python.org/pypi/nose
2 install by pip
3 nose is a testing frame,Lettuce_webdriver depends on it to run.
3 Create directory structure; as follow.
4 Write baidu.feature file.
5 Write testing script in step_definitions directory.
6 Create terrain.py in support directory to define the basic configuration of test script.
'''
