Plot not working

[Sharan Basappa]

I am new to Python and using it to learn machine learning.

Below is a sample program I am running to plot IRIS data set.
The code runs but no plot comes up. I am not sure what the issue is with the code.

# Imports
from matplotlib import pyplot as plt
from sklearn.datasets import load_iris
import numpy as np

# load the data with load_iris from sklearn
data = load_iris()
features = data['data']
feature_names = data['feature_names']
target = data['target']

#print("features\n",features)
#print("feature names\n",feature_names)
#print("target\n",target);
#print("data\n",data)

for t,marker,c in zip(range(3),">ox","rgb"):
    # plot each class on its own to get different colored markers
    plt.scatter(features[target == t,0],
                features[target == t,1],
                marker=marker,
                c=c)