改成这样
class fooclass(object):
nm = ''
version = 0.1
_weight = 0
def __init__(self, nm = 'hello'):
self.name = nm
print('your name is ' + self.name)
def showname(self):
print(self.nm)
def add(self, x):
return(x + x)
if __name__=="__main__":
foo = fooclass()
foo.showname()