Python中的KNN实现

我正在尝试在Python中实现一个简单的KNN技术，我使用分钟的股票价格数据，并使用我的x变量作为Open，Close和Volume数据来预测下一分钟的开盘价 . 我的代码如下： -

import numpy as np
import pandas as pd
import scipy
import matplotlib.pyplot as plt
from pylab import rcParams
import urllib
import sklearn
from sklearn.neighbors import KNeighborsRegressor
from sklearn import neighbors
from sklearn import preprocessing
from sklearn.cross_validation import train_test_split
from sklearn import metrics 
from googlefinance.client import get_price_data, get_prices_data, get_prices_time_data
import copy

np.set_printoptions(precision = 4, suppress = True)
rcParams['figure.figsize']=7,4
plt.style.use('seaborn-whitegrid')




param = {'q':"DJUSBK", 'i':"60",'x':"INDEXDJX",'p':"1Y"} # Dow Joes Banks
djusbk = get_price_data(param)
ticker_list=['ASB','BXS','BAC','BOH','BKU'] # 5 stocks from the Dow Jones Bank Index
ticker_dict = {}
for i in ticker_list :
    param = {'q':i, 'i':"60",'x':"NYSE",'p':"1Y"}
    df = get_price_data(param)
    x=i
    ticker_dict[x] = df

asb = copy.deepcopy(ticker_dict['ASB'])
asb_prime = pd.DataFrame(asb['Open'])
asb_prime['Close'] = asb['Close']
asb_prime['Volume'] = asb['Volume']

asb_prime_copy = copy.deepcopy(asb_prime)


# Splitting your data into test and training data sets
X_prime = asb_prime_copy.ix[:,(0,1,2)].values
asb_open_next = pd.DataFrame(copy.deepcopy(asb['Open']))
asb_open_next.drop(asb_open_next.index[:1], inplace=True)

asb_prime_copy= asb_prime_copy[:-1]

X_prime = asb_prime_copy.ix[:,(0,1,2)].values
y = asb_open_next.ix[:,(0)].values

X = preprocessing.scale(X_prime)

X_train, X_test, y_train, y_test = train_test_split(X,y,test_size=0.5,random_state = 17)

#Building and Training Model  with Training Data
clf = neighbors.KNeighborsRegressor()
clf.fit(X_train,y_train)
print(clf)

# Evaluating the model's predictions against the test dataset
y_expect=y_test

y_pred= clf.predict(X_test)
print(metrics.classification_report(y_expect,y_pred))

在最后，我得到了错误 . 不知道为什么？我使用的是Python 3.x.

File "C:\Users\gg\Anaconda3\lib\site-packages\sklearn\utils\multiclass.py", line 97, in unique_labels
    raise ValueError("Unknown label type: %s" % repr(ys))

ValueError: Unknown label type: (array([ 28.2  ,  28.375,  28.325, ...,  28.075,  28.275,  28.1  ]), array([ 28.23 ,  28.4  ,  28.32 , ...,  28.055,  28.28 ,  28.08 ]))

As suggested in the below answer KNeighborsClassifier() was updated with KNeighborsRegressor() and that had solved the previous issue