pr127.py

来自「mallet是自然语言处理、机器学习领域的一个开源项目。」· Python 代码 · 共 11 行

class foo:
    def bar():
        return 'bar'

try:
    foo.bar()
except TypeError:
    pass
else:
    print 'unbound method must be called with class instance 1st argument'