app.py

import gradio as gr
import numpy as np
from PIL import Image
import requests
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

import hopsworks
import joblib


def prepare_for_write(df):
    # Convert the categorical features to numerical
    def sexToInt(x):
        if x == "male":
            return 0
        elif x == "female":
            return 1
        else:
            raise Exception("Unsupported sex value: " + x)

    def embarkedToInt(x):
        if x == "S":
            return 0
        elif x == "C":
            return 1
        elif x == "Q":
            return 2
        else:
            raise Exception("Unsupported embarked value: " + x)

    df["Sex"] = df["Sex"].apply(sexToInt)
    df["Embarked"] = df["Embarked"].apply(embarkedToInt)
    # le = preprocessing.LabelEncoder()
    # df = df.apply(le.fit_transform)
    df.columns = df.columns.str.lower()
    return df


project = hopsworks.login()
fs = project.get_feature_store()


mr = project.get_model_registry()
model = mr.get_model("titanic_modal", version=3)
model_dir = model.download()
model = joblib.load(model_dir + "/titanic_model.pkl")


catToInput = {
    "Sex": ["male", "female"],
    "Embarked": ["Southampton", "Cherbourg", "Queenstown"],
    "Pclass": ["First", "Second", "Third"]
}

cityToInput = {
    "Southampton": "S",
    "Cherbourg": "C",
    "Queenstown": "Q"
}

classToInput = {
    "First": 1,
    "Second": 2,
    "Third": 3
}


# features = pd.read_csv(
#     "https://raw.githubusercontent.com/Nathanotal/remoteFiles/main/titanicCleaned.csv")
# features = features.drop(columns=["survived"])
# featureLabels = features.columns
featureLabels = ["Pclass", "Name", "Sex", "Age", "SibSp",
                 "Parch", "Ticket", "Fare", "Cabin", "Embarked"]
inputs = []
numericalInputs = ["Age", "SibSp", "Parch", "Fare"]
# Maybe move cabin to categorical
worthlessInputs = ["Name", "Ticket", "Cabin", "Title"]
categoricalInputs = ["Sex", "Embarked", "Pclass"]

columnHeaders = ["Pclass", "Sex", "Age", "SibSp",
                 "Parch", "Fare", "Embarked", "Title"]  # Todo: remove title


def titanic(Pclass, Sex, Age, SibSp, Parch, Fare, Embarked):
    Embarked = cityToInput[Embarked]
    Pclass = classToInput[Pclass]
    # Create a dataframe from the input values
    input_variables = pd.DataFrame(
        [[Pclass, Sex, Age, SibSp, Parch, Fare, Embarked, 1.0]], columns=columnHeaders)
    df = prepare_for_write(input_variables)

    # Save first row as a numpy array
    input_list = df.iloc[0].to_numpy()

    # 'res' is a list of predictions returned as the label.
    res = model.predict(np.asarray(input_list).reshape(1, -1))

    # We add '[0]' to the result of the transformed 'res', because 'res' is a list, and we only want
    # the first element.

    intLabelToText = {0: "Died", 1: "Survived"}

    survived = res[0]

    # Todo: survivor, "https://fakeface.rest/face/json?maximum_age=50&gender=female&minimum_age=49"
    generate_survivor_url = f'https://fakeface.rest/face/json?maximum_age={int(Age)}&gender={Sex}&minimum_age={int(Age)}'
    randomized_face_url = requests.get(
        generate_survivor_url).json()["image_url"]

    survivor_url = randomized_face_url
    img = Image.open(requests.get(survivor_url, stream=True).raw).style(
        height='100', rounded=False)

    #
    red_cross_url = "https://www.iconsdb.com/icons/preview/red/x-mark-xxl.png"
    green_check_mark_url = "https://www.iconsdb.com/icons/preview/green/checkmark-xxl.png"

    label_to_url = {
        0: red_cross_url,
        1: green_check_mark_url
    }

    url = label_to_url.get(survived)

    # Save the image of the person
    img2 = Image.open(requests.get(url, stream=True).raw).style(
        height='100', rounded=False)

    return img, img2


featureLabels = ["Pclass", "Name", "Sex", "Age", "SibSp",
                 "Parch", "Ticket", "Fare", "Cabin", "Embarked"]


for feature in featureLabels:
    if feature in numericalInputs:
        if feature == 'Age':
            inputs.append(gr.inputs.Slider(9, 75, 1, label='Age (years)'))
        elif feature == 'SibSp':
            inputs.append(gr.inputs.Slider(
                0, 10, 1, label='Number of siblings/spouses aboard'))
        elif feature == 'Parch':
            inputs.append(gr.inputs.Slider(
                0, 10, 1, label='Number of parents/children aboard'))
        elif feature == 'Fare':
            inputs.append(gr.inputs.Slider(0, 1000, 1, label='Ticket fare'))
        else:
            raise Exception(f'Feature: "{feature}" not found')
    elif feature in worthlessInputs:
        pass
        # inputs.append(gr.Inputs.Textbox(default='text', label=feature))
    elif feature in categoricalInputs:
        if feature == "Sex":
            inputs.append(gr.inputs.Dropdown(
                choices=catToInput.get(feature), default="male", label=feature))
        elif feature == "Embarked":
            inputs.append(gr.inputs.Dropdown(
                choices=catToInput.get(feature), default="Southampton", label='City of embarkation'))
        elif feature == "Pclass":
            inputs.append(gr.inputs.Dropdown(
                choices=catToInput.get(feature), default=3, label='Ticket class'))
    else:
        raise Exception(f'Feature: "{feature}" not found')

demo = gr.Interface(
    fn=titanic,
    title="Titanic Survivor Predictive Analytics",
    description="Experiment with person features to predict which survivor it is.",
    allow_flagging="never",
    inputs=inputs,
    outputs=[gr.Image(type="pil"), gr.Image(type="pil")])

demo.launch()