"Hello, World!" - Classifying Iris Flower Types

The Iris dataset is one of the most well known in the machine learning community. Let's use it to get started with mlrequest.

It's recommended to install the mlrequest Python client which makes it faster and even simpler to use mlrequest in the model training and validation phase. To install, run

$pip install mlrequest

Python 3.5 or greater is required to use the client. Otherwise, the other language tabs will show how to use the API with standard POST requests.

Scikit-Learn Models

Deploying

We will locally train a Random Forest classifier to detect the difference between Iris Flower types based on the input features: sepal length, sepal width, petal length, and petal width.

The model is then deployed to 5 data centers around the world with a single line of Python. Predictions can then be received with a request from any application.

from mlrequest import SKLearn
from sklearn.ensemble import RandomForestClassifier
import requests
​
X = requests.get("https://mlrequest.com/data/iris_train_features_sklearn.json").json()['iris-data']
y = requests.get("https://mlrequest.com/data/iris_train_labels_sklearn.json").json()['iris-data']
​
clf = RandomForestClassifier()
clf.fit(X, y)
​
sklearn = SKLearn('your-api-key')
sklearn.deploy(clf, 'iris-flower-types')

Predicting

Predictions are now received with a POST request. Prediction requests are latency-routed to the nearest data center to receive the quickest response.

X = requests.get("https://mlrequest.com/data/iris_test_features_sklearn.json").json()['iris-data']
y = requests.get("https://mlrequest.com/data/iris_test_labels_sklearn.json").json()['iris-data']
​
r = sklearn.predict(X, 'iris-flower-types')
predictions = r.predict_result
​
#Evaluate prediction accuracy
num_correct=0
for i in range(0, len(y)):
    if predictions[i] == y[i]:
        num_correct += 1
​
print(f'Accuracy of predictions: {num_correct/len(predictions)}')

X = requests.get("https://mlrequest.com/data/iris_test_features_sklearn.json").json()['iris-data']
y = requests.get("https://mlrequest.com/data/iris_test_labels_sklearn.json").json()['iris-data']
​
payload = {
    'features': X,
    'model_name': 'iris-flower-types'
}
​
r = requests.post('https://api.mlrequest.com/v1/sklearn/predict', json=payload, headers={'MLREQ-API-KEY':'your-api-key'})
predictions = r.json()['predict_result']
​
#Evaluate prediction accuracy
num_correct=0
for i in range(0, len(y)):
    if predictions[i] == y[i]:
        num_correct += 1
​
print(f'Accuracy of predictions: {num_correct/len(predictions)}')

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Online Learning Models

Training in the Cloud

Here we will teach the model to detect the type of Iris flower based on 4 input features: sepal length, sepal width, petal length, and petal width.

from mlrequest import Classifier
import requests
iris_train = requests.get("https://mlrequest.com/data/iris_train.json").json()['iris-data']
classifier = Classifier('your-api-key')
classifier.learn(training_data=iris_train, model_name='iris-classifier', class_count=2)

import requests
iris_train = requests.get("https://mlrequest.com/data/iris_train.json").json()['iris-data']
payload = {'model_name': 'iris-flower-types',
           'class_count': 2,
           'training_data': iris_train}
           
r = requests.post('https://api.mlrequest.com/v1/classifier/batch/learn', json=payload, headers={'MLREQ-API-KEY':'your-api-key'})

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Predicting

Here we will use data that the model has not seen before, to test how well it can predict which type of Iris flower it is.

iris_test = requests.get("https://mlrequest.com/data/iris_test.json").json()['iris-data']
response = classifier.predict(features=iris_test, model_name='iris-classifier', class_count=2)
predictions = response.predict_result

iris_test = requests.get("https://mlrequest.com/data/iris_test.json").json()['iris-data']
payload = {'model_name': 'iris-flower-types',
           'class_count': 2,
           'features': iris_test}
​
r = requests.post('https://api.mlrequest.com/v1/classifier/batch/predict', json=payload, headers={'MLREQ-API-KEY':'your-api-key'})
predictions = r.json()['predict_result']
print(predictions)

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Evaluating

We've received predictions from the unseen data, and now we want to know how well the model did. Let's compare how well the model predicted Iris flower types to the actual labels for each example.

iris_test_with_labels = requests.get("https://mlrequest.com/data/iris_test_with_labels.json").json()['iris-data']
​
num_correct = 0
for i in range(0, len(predictions)):
    if predictions[i] == iris_test_with_labels[i]['label']:
        num_correct += 1
​
print(f'Accuracy of predictions: {num_correct/len(predictions)}')

iris_test_with_labels = requests.get("https://mlrequest.com/data/iris_test_with_labels.json").json()['iris-data']
​
num_correct = 0
for i in range(0, len(predictions)):
    if predictions[i] == iris_test_with_labels[i]['label']:
        num_correct += 1
​
print(f'Accuracy of predictions: {num_correct/len(predictions)}')

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Now we can predict Iris flowers for any app, with a single HTTP request! Not only that, but this model was also duplicated to 5 data centers around the world to provide the lowest latency and most available experience for your application's users.

This was just meant to be a toy example for getting started. However, you can apply this same method with different data to create intelligent applications for websites, mobile apps, ecommerce stores, IoT apps, and more.

Read on in the docs to see more examples and use cases for mlrequest.