对Python中的@classmethod用法详解

class DemoClass:
    @classmethod
    def classPrint(self):
       print("class method")
    def objPrint(self):
       print("obj method")
 
obj = DemoClass()
obj.objPrint()
obj.classPrint()
 
DemoClass.classPrint()
DemoClass.objPrint()

grey@DESKTOP-3T80NPQ:/mnt/e/01_workspace/02_programme_language/03_python/03_OOP/2017/08$python classmethod.py
obj method
class method
class method
Traceback (mostrecent call last):
 File "classmethod.py", line 13, in<module>
  DemoClass.objPrint()
TypeError: unboundmethod objPrint() must be called with DemoClass instance as first argument (gotnothing instead)
grey@DESKTOP-3T80NPQ:/mnt/e/01_workspace/02_programme_language/03_python/03_OOP/2017/08$exit
exit
 
E:\01_workspace\02_programme_language\03_python\03_OOP\2017\08>pythonclassmethod.py
obj method
class method
class method
Traceback (mostrecent call last):
 File "classmethod.py", line 13, in<module>
  DemoClass.objPrint()
TypeError:objPrint() missing 1 required positional argument: 'self'