实例没有属性\u float_

Question

我正在学习python2.7.13在windows上的类构造。我得到一个错误：Sales实例没有属性\uuu float\u

有什么提示可以让我的代码工作吗？如何避免这种错误？ 下面是我的代码

class Sales():
    # Sales predicts

    def __init__(self, df):
        # Each sales dataset has descriptive statistics.
        self.desc = df.describe()
        self.rows = len(df)
        self.cols = len(df.columns)
        self.counts = df['TARGET'].value_counts()
        self.plot = sns.countplot(x = 'TARGET', data = df, palette='hls')


    def sales_prob(self, df1, df2):
        """
        Function that computes logistic regression given a training and testing dataframes
        :param df1: historical dataframe (training)
        :param df2: monthly dataframe (testing)
        :return: df_out : dataframe containing predictions for the target 2
        """
        X_train0 = list(df1.loc[:, df1.columns != 'TARGET'])
        X_train = df1[X_train0]
        y_train = df1[['TARGET']]

        X_test0 = list(df2.loc[:, df2.columns != 'TARGET'])
        X_test = df2[X_test0]
        y_test = df2[['TARGET']]

        classifier = LogisticRegression(random_state=0)
        classifier.fit(self, X_train, y_train.values.ravel())
        y_pred2 =pd.DataFrame(classifier.predict_proba(self, X_test))
        y_pred2['prediction2'] = y_pred2[[2]]

        df_out = pd.merge(df2, y_pred2[['prediction2']], how = 'left', left_index=True, right_index=True)

        return (df_out)

# Example to use Sales class
venta = Sales(data1)
venta.desc
venta.cols

proba = venta.sales_prob(data1, data2)

这是我的回溯

Traceback (most recent call last): File "C:\Documents\Anaconda2\Lib\site-packages\IPython\core\interactiveshell.py", line 2881, in run_code exec(code_obj, self.user_global_ns, self.user_ns) File "", line 1, in proba = venta.sales_prob(data1, data2) File "", line 29, in sales_prob classifier.fit(self, X_train, y_train.values.ravel()) File "C:\Documents\Anaconda2\Lib\site-packages\sklearn\linear_model\logistic.py", line 1173, in fit order="C") File "C:\Documents\Anaconda2\Lib\site-packages\sklearn\utils\validation.py", line 521, in check_X_y ensure_min_features, warn_on_dtype, estimator) File "C:\Documents\Anaconda2\Lib\site-packages\sklearn\utils\validation.py", line 382, in check_array array = np.array(array, dtype=dtype, order=order, copy=copy) AttributeError: Sales instance has no attribute 'float' traceback.print_tb