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November 17, 2017 01:55
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DNN using Estimators and Contrib to create and predict using Tensor Flow
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from __future__ import absolute_import, division, print_function | |
import pandas as pd | |
import numpy as np | |
import tensorflow as tf | |
import os | |
import shutil | |
import tempfile | |
import urllib | |
%matplotlib inline | |
import matplotlib | |
import matplotlib.pyplot as plt | |
# printing out the versions | |
print(tf.__version__) | |
print(pd.__version__) | |
cwd = os.getcwd() | |
cwd | |
train_file = tempfile.NamedTemporaryFile() | |
test_file = tempfile.NamedTemporaryFile() | |
urllib.urlretrieve("https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.data", train_file.name) | |
urllib.urlretrieve("https://archive.ics.uci.edu/ml/machine-learning-databases/adult/adult.test", test_file.name) | |
TRAIN_FILE_NAME = cwd + "/adult.data.csv" | |
TEST_FILE_NAME = cwd + "/adult.test.csv" | |
#Columns | |
CSV_COLUMNS = [ | |
"age", "workclass", "fnlwgt", "education", "education_num", | |
"marital_status", "occupation", "relationship", "race", "gender", | |
"capital_gain", "capital_loss", "hours_per_week", "native_country", | |
"income_bracket" | |
] | |
df_train = pd.read_csv(TRAIN_FILE_NAME, names=CSV_COLUMNS, skipinitialspace=True) | |
df_test = pd.read_csv(TEST_FILE_NAME, names=CSV_COLUMNS, skipinitialspace=True, skiprows=1) | |
df_test.head() | |
#Construct a new column named label as the ouput column | |
LABEL_COLUMN = "label" | |
df_train[LABEL_COLUMN] = (df_train["income_bracket"].apply(lambda x: ">50K" in x)).astype(int) | |
df_test[LABEL_COLUMN] = (df_test["income_bracket"].apply(lambda x: ">50K" in x)).astype(int) | |
CATEGORICAL_COLUMNS = ["workclass", "education", "marital_status", "occupation", | |
"relationship", "race", "gender", "native_country"] | |
CONTINUOUS_COLUMNS = ["age", "education_num", "capital_gain", "capital_loss", "hours_per_week"] | |
# Create an input function which converts the data to tensors/sparse tensors | |
def input_fn(df): | |
# Creates a dictionary mapping from each continuous feature column name (k) to | |
# the values of that column stored in a constant Tensor. | |
continuous_cols = {k: tf.constant(df[k].values) | |
for k in CONTINUOUS_COLUMNS} | |
# Creates a dictionary mapping from each categorical feature column name (k) | |
# to the values of that column stored in a tf.SparseTensor. | |
categorical_cols = {k: tf.SparseTensor( | |
indices=[[i, 0] for i in range(df[k].size)], | |
values=df[k].values, | |
dense_shape=[df[k].size, 1]) | |
for k in CATEGORICAL_COLUMNS} | |
# Merges the two dictionaries into one. | |
feature_cols = dict(continuous_cols.items() + categorical_cols.items()) | |
# Converts the label column into a constant Tensor. | |
label = tf.constant(df[LABEL_COLUMN].values) | |
# Returns the feature columns and the label. | |
return feature_cols, label | |
def train_input_fn(): | |
return input_fn(df_train) | |
def eval_input_fn(): | |
return input_fn(df_test) | |
# Engineering the features of the columns | |
gender = tf.contrib.layers.sparse_column_with_keys(column_name="gender", keys=["Female", "Male"]) | |
#Define the sparse categorical columns with hash_buckets when we dont know the number of unique variables | |
education = tf.contrib.layers.sparse_column_with_hash_bucket("education", hash_bucket_size=1000) | |
relationship = tf.contrib.layers.sparse_column_with_hash_bucket("relationship", hash_bucket_size=100) | |
workclass = tf.contrib.layers.sparse_column_with_hash_bucket("workclass", hash_bucket_size=100) | |
occupation = tf.contrib.layers.sparse_column_with_hash_bucket("occupation", hash_bucket_size=1000) | |
native_country = tf.contrib.layers.sparse_column_with_hash_bucket("native_country", hash_bucket_size=1000) | |
marital_status = tf.contrib.layers.sparse_column_with_hash_bucket("marital_status", hash_bucket_size=1000) | |
race = tf.contrib.layers.sparse_column_with_hash_bucket("race", hash_bucket_size=1000) | |
# Define the base featured columns with continous values | |
# Below features are not used | |
'''age = tf.contrib.layers.real_valued_column("age") | |
education_num = tf.contrib.layers.real_valued_column("education_num") | |
capital_gain = tf.contrib.layers.real_valued_column("capital_gain") | |
capital_loss = tf.contrib.layers.real_valued_column("capital_loss") | |
hours_per_week = tf.contrib.layers.real_valued_column("hours_per_week") | |
''' | |
# --------- ---------- Define the Simple logistic regression model --------- ---------- # | |
model_dir = tempfile.mkdtemp() | |
m = tf.contrib.learn.LinearClassifier(feature_columns=[ | |
gender, native_country, education, occupation, workclass, marital_status, race], | |
model_dir=model_dir) | |
# Training the model | |
m.fit(input_fn=train_input_fn, steps=200) | |
# Evaluating the model | |
results = m.evaluate(input_fn=eval_input_fn, steps=1) | |
for key in sorted(results): | |
print("%s: %s" % (key, results[key])) | |
### saving the sample model | |
feature_columns = set([gender, native_country, education, occupation, workclass, marital_status, race]) | |
#Save Model into saved_model.pbtxt file (possible to Load in Java) | |
tfrecord_serving_input_fn = tf.contrib.learn.build_parsing_serving_input_fn(tf.contrib.layers.create_feature_spec_for_parsing(feature_columns)) | |
m.export_savedmodel(export_dir_base="/Users/gagandeep.malhotra/Documents/SampleTF_projects/tempppp", serving_input_fn = tfrecord_serving_input_fn,as_text=False) | |
#Loading mode for prediction | |
from tensorflow.contrib import predictor | |
export_dir = "/Users/Documents/SampleTF_projects/tempppp/1510877466/" | |
predict_fn = predictor.from_saved_model(export_dir, signature_def_key=None) | |
input11 = df_train[2:3] | |
K_CATEGORICAL_COLUMNS = ["gender", "native_country", "education", "occupation", "workclass", "marital_status", "race"] | |
def test_ip(df): | |
# Creates a dictionary mapping from each continuous feature column name (k) to | |
# the values of that column stored in a constant Tensor. | |
#continuous_cols = {k: tf.constant(df[k].values) | |
# for k in K_CONTINUOUS_COLUMNS} | |
# Creates a dictionary mapping from each categorical feature column name (k) | |
# to the values of that column stored in a tf.SparseTensor. | |
categorical_cols = {k: tf.SparseTensor( | |
indices=[[i, 0] for i in range(df[k].size)], | |
values=df[k].values, | |
dense_shape=[df[k].size, 1]) | |
for k in K_CATEGORICAL_COLUMNS} | |
# Merges the two dictionaries into one. | |
#feature_cols = dict(continuous_cols.items() + categorical_cols.items()) | |
return categorical_cols | |
# Make a dict to be passed to the predict function containg the test data | |
dict_test = test_ip(input11) | |
predictions = predict_fn(dict_test) | |
print(predictions['probabilities']) | |
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