ipdb-继续不会在断点处停止

Question

我将断点设置为第10行-使用以下代码：

ipdb> b 10

然后我运行以下内容以继续

ipdb> c

我认为这样做会在我设置的第10行的断点处停止

return self # line 10

但是，它将一直运行到最后。为什么？它不应该停在我设置的断点第10行吗？

代码（来自书本）：

from sklearn.base import BaseEstimator, TransformerMixin
rooms_ix, bedrooms_ix, population_ix, household_ix = 3, 4, 5, 6


class CombinedAttributesAdder(BaseEstimator, TransformerMixin):    
    def __init__(self, add_bedrooms_per_room = True): # no *args or **kargs
        import pdb; pdb.set_trace()
        self.add_bedrooms_per_room = add_bedrooms_per_room
    def fit(self, X, y=None):
        return self # line 10
    def transform(self, X, y=None):
        rooms_per_household = X[:, rooms_ix] / X[:, household_ix]
        population_per_household = X[:, population_ix] / X[:, household_ix]
        if self.add_bedrooms_per_room:
        bedrooms_per_room = X[:, bedrooms_ix] / X[:, rooms_ix]
        return np.c_[X, rooms_per_household, population_per_household, bedrooms_per_room]
    else:
        return np.c_[X, rooms_per_household, population_per_household]

attr_adder = CombinedAttributesAdder(add_bedrooms_per_room=False)

谢谢