在类中定义装饰器，在类定义中也可以使用
我正在尝试将一个“子命令”系统实现为Python中的可继承类。我的预期用例类似于：
from command import Command
import sys
class MyCommand(Command):
@Command.subcommand
def foo(self):
print "this can be run as a subcommand"
def bar(self):
print "but this is a plain method and isn't exposed to the CLI"
MyCommand()(*sys.argv)
# at the command line, the user runs "mycommand.py foo"
Command.subcommand
TypeError: 'staticmethod' object is not callable
class Command(object):
@staticmethod
def subcommand(method):
method.is_subcommand = True
return method
@subcommand
def common(self):
print "this subcommand is available to all child classes"
subcommand
def subcommand(method):
method.is_subcommand = True
return method
class Command(object):
@subcommand
def common(self):
print "this subcommand is available to all child classes"
Command.subcommand = staticmethod(subcommand)
del subcommand
没有找到相关结果
已邀请:
1 个回复
博沮富教全
class Command(object): def subcommand(method): # Regular function in class definition scope. method.is_subcommand = True return method @subcommand def common(self): print "this subcommand is available to all child classes" subcommand = staticmethod(subcommand) # Now a static method. Can no longer be called during class definition phase.class Command(object): @staticmethod def subcommand(method): method.is_subcommand = True return method class CommandBase(Command): @Command.subcommand def common(self): print "this subcommand is available to all child classes"而不是继承所有类。