| 表达式 | 描述 |
| a == b | a等于b |
| a != b | a不等于b |
| a > b | a大于b |
| a >= b | a大于等于b |
| a is b | a和b 是同一个对象 |
| a is not b | a和b不是同一个对象 |
| a in A | a在A中 |
| a not in A | a不在A中 |
| 假（False） | 真（TRUE） |
| False | True |
| None | not None |
| 0 | not 0 |
| ‘‘(空） | not ‘‘ |
| [](空字典) | 字典中有元素 |
| ()（空元组） | 元组中有元素 |
| {}(空字典) | 字典中有元素 |
| set() | 集合中有元素 |
>>> condition= False
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= True
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= None
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= 2
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= 0
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= 2
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition=‘‘
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition=‘test‘
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= []
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= [2]
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= ()
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= (2)
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= {}
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= {‘key‘:‘value‘}
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= {}
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= {‘key‘,‘value‘}
>>> print (‘True‘) if condition else print( ‘False‘)
True
>>> condition= set()
>>> print (‘True‘) if condition else print( ‘False‘)
False
>>> condition= set([‘key‘,‘value‘])
>>> print (‘True‘) if condition else print( ‘False‘)
True
原文：https://www.cnblogs.com/qianslup/p/11119009.html