我正在尝试为我用extratees分类器实现的机器学习模型开发一个UI
下面的代码显示了我如何在培训后导出模型以在UI中使用。使用is_attributed
列进行预测
import numpy as np
import pandas as pd
from collections import Counter
import datetime
from sklearn.model_selection import train_test_split
from sklearn.model_selection import RepeatedStratifiedKFold
import gc
import warnings
warnings.simplefilter('ignore')
df = pd.read_csv('../cleaned_train.csv', index_col=0)
df['click_time'] = pd.to_datetime(df['click_time'])
df.info()
<class 'pandas.core.frame.DataFrame'>
Int64Index: 10000000 entries, 0 to 9999999
Data columns (total 9 columns):
# Column Dtype
--- ------ -----
0 ip int64
1 app int64
2 device int64
3 os int64
4 channel int64
5 click_time datetime64[ns]
6 is_attributed int64
7 hour int64
8 day int64
dtypes: datetime64[ns](1), int64(8)
memory usage: 762.9 MB
X= df.drop(columns=['is_attributed', 'click_time'])
y= df['is_attributed']
#Undersample data
from imblearn.under_sampling import RandomUnderSampler
rus = RandomUnderSampler()
X_res, y_res = rus.fit_resample(X, y)
X_train, X_test, y_train, y_test = train_test_split(X_res, y_res, test_size = 0.33,
random_state = 0)
from sklearn.ensemble import ExtraTreesClassifier
from sklearn.model_selection import GridSearchCV
import pickle
# ExtraTreesClassifier
ec = ExtraTreesClassifier(max_depth=None, n_estimators=50)
ec.fit(X_train, y_train)
y_predec=ec.predict(X_test)
pickle.dump(gsec,open('model.pkl','wb'))
当我试图打印这个print(gsec.predict(X_test))
时,我得到的结果是[1 1 0 ... 1 1 0]
当我尝试用flask开发UI时,问题就出现了。我将模型导入烧瓶中并尝试预测。下面是代码
# importing necessary libraries and functions
import numpy as np
import pandas as pd
from flask import Flask, request, jsonify, render_template, make_response
from werkzeug.utils import secure_filename
from werkzeug.datastructures import FileStorage
import pickle
import io
from io import StringIO
import csv
app = Flask(__name__) #Initialize the flask App
@app.route('/') # Homepage
def home():
return render_template('index.html')
@app.route('/predict',methods=['GET', 'POST'])
def predict():
'''
For rendering results on HTML GUI
'''
# retrieving values from form
if request.method == 'POST':
f = request.files['data_file']
if not f:
return "No file"
stream = io.StringIO(f.stream.read().decode("UTF8"), newline=None)
csv_input = csv.reader(stream)
# print(csv_input)
for row in csv_input:
print(row)
stream.seek(0)
result = stream.read()
df = pd.read_csv('newcleaned_test.csv')
attribute = df['is_attributed']
ip = df['ip']
print (attribute)
# load the model from disk
loaded_model = pickle.load(open('model.pkl', 'rb'))
prediction = loaded_model.predict([attribute])
print (prediction)
return 'prediction'
if __name__ == "__main__":
app.run(debug=True)
尝试运行上述代码时
ValueError: X has 500000 features, but ExtraTreeClassifier is expecting 7 features as input.
显示在我的浏览器中。(我使用的数据文件有500000个数据,有7列)。当我使用一列训练模型时,为什么会抛出这个错误
你在这里有一些误解
首先,从代码中,您可以看到模型在7列上作为输入进行训练
[ip, app, device, os, channel, hour, day]
。并对模型进行训练,从is_attributed
列预测值。因此,为模型列表提供7个值->;接收1个值作为输出。这个值似乎是0或1,取决于输入的7个值其次,我们现在可以进入烧瓶部分。基本上,这里要做的是加载dataframe并选择一列(
attribute = df['is_attributed']
)。如果您的dataframe有50000行,并且您选择了一列,则表示您选择了50000个值!然后你们试着把它发送给模型,模型需要7个值作为输入。 从我的角度来看,您似乎希望在test
数据帧的每一行上运行模型为此,您需要:
test
数据帧李>[ip, app, device, os, channel, hour, day]
)。如果有更多列,请删除所有其他列李>相关问题 更多 >
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