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vanderbilt_003_ari_dataset.py
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vanderbilt_003_ari_dataset.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import urllib.request
import io
import zipfile
import pandas # install pandas by "pip install pandas", or install Anaconda distribution (https://www.anaconda.com/)
# Warning: the data processing techniques shown below are just for concept explanation, which are not best-proctices
# data set repository
# http://biostat.mc.vanderbilt.edu/wiki/bin/view/Main/AriDescription
# if the file is on your local device, change url_data_train into local file path, e.g., 'D:\local_file.data'
url_data_train = 'http://biostat.mc.vanderbilt.edu/wiki/pub/Main/DataSets/ari.zip'
def download_file(url):
resp = urllib.request.urlopen(url)
if resp.status != 200:
resp.close()
raise ValueError('Error: {0}'.format(resp.reason))
print('\rStarted', end = '\r')
content_length = resp.getheader('Content-Length')
if content_length is None:
content_length = '(total: unknown)'
else:
content_length = int(content_length)
if content_length < 1024:
content_length_str = '(total %.0f Bytes)' % content_length
elif content_length < 1024 * 1024:
content_length_str = '(total %.0f KB)' % (content_length / 1024)
else:
content_length_str = '(total %.1f MB)' % (content_length / 1024 / 1024)
total = bytes()
while not resp.isclosed():
total += resp.read(10 * 1024)
if len(total) < 1024:
print(('\rDownloaded: %.0f Bytes ' % len(total)) + content_length_str + ' ', end = '\r')
if len(total) < 1024 * 1024:
print(('\rDownloaded: %.0f KB ' % (len(total) / 1024)) + content_length_str + ' ', end = '\r')
else:
print(('\rDownloaded: %.1f MB ' % (len(total) / 1024 / 1024)) + content_length_str + ' ', end = '\r')
print()
return io.BytesIO(total)
# download data from website
data_train = download_file(url_data_train) if url_data_train.startswith('http') else url_data_train
# unzip the downloaded file, and get data files
with zipfile.ZipFile(data_train) as myzip:
with myzip.open('ari/ari.csv') as myfile:
df_train = pandas.read_csv(myfile, header = 0)
with myzip.open('ari/Sc.csv') as myfile:
df_sc = pandas.read_csv(myfile, header = 0)
with myzip.open('ari/Y.csv') as myfile:
df_y = pandas.read_csv(myfile, header = 0)
# merge y lable with features
df_y = df_y.drop('Unnamed: 0', axis = 1).rename(columns = {'x': 'target_death'})
df_sc = df_sc.drop(['age', 'rr', 'hrat', 'temp', 'waz'], axis = 1)
df_train = df_train.merge(df_sc, how = 'left', on = 'Unnamed: 0')
df_train = df_y.merge(df_train, how = 'left', left_index = True, right_index = True)
# drop variables which are not for modeling
df_train = df_train.drop(['Unnamed: 0', 'stno'], axis = 1)
# the target variable, set target_death > 0 to 1 and target_death = other values to 0
df_train['target_death'] = df_train['target_death'].apply(lambda x: 1 if x > 0 else 0)
# save the dataframe as CSV file, you can zip it, upload it to t1modeler.com, and build a model
df_train.to_csv('vanderbilt_003_ari_dataset.csv', index = False)