2018/06/1-2018/06/4
参考资料:
[菜鸟教程](http://www.runoob.com/python3/python3-examples.html)
[Python解惑:True与False](https://foofish.net/python-true-false.html)
[python里None 表示False吗?](https://www.zhihu.com/question/48707732)
学习过程中有下面一段简单的代码,但自己却还写不出精确的注释,需要把条件控制相关的内容再巩固下!!
def __init__(self, driver, path=None):
self.driver = driver
self.domain = 'http://localhost/wordpress/'
if path:
self.url = self.domain + path
else:
self.url = None
if self.url != None:
self.navigate()
为False的几种情况
- 布尔型,False表示False,其他为True
- 整数和浮点数,0表示False,其他为True
- 字符串和类字符串类型(包括bytes和unicode),空字符串表示False,其他为True
- 序列类型(包括tuple,list,dict,set等),空表示False,非空表示True
- None永远表示False
#No.1
path = None
if path:
print('true')
else:
print('false')
resut:
d:\fly\Python (master -> origin)
λ python test.py
false
def login(self, username, password):
self.username_text_field.send_keys(username)
self.password_text_field.send_keys(password)
self.login_btn.click()
return DashboardPage(self.driver)