app.py

import gradio as gr
import regex as re
import torch
import nltk
import pandas as pd
from transformers import AutoTokenizer, AutoModelForSequenceClassification
from nltk.tokenize import sent_tokenize
import plotly.express as px
import time
import tqdm
nltk.download('punkt_tab')

# Define the device (GPU or CPU)
device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")

# Define the model and tokenizer
checkpoint = "ieq/IEQ-BERT"
tokenizer = AutoTokenizer.from_pretrained(checkpoint)
model = AutoModelForSequenceClassification.from_pretrained(checkpoint).to(device)


# Define the function for preprocessing text
def prep_text(text):
    clean_sents = []
    sent_tokens = sent_tokenize(str(text))
    for sent_token in sent_tokens:
        word_tokens = [str(word_token).strip().lower() for word_token in sent_token.split()]
        clean_sents.append(' '.join((word_tokens)))
    joined_clean_sents = '. '.join(clean_sents).strip(' ')
    return joined_clean_sents


# APP INFO
def app_info():
    check = """
    Please go to either the "Single-Text-Prediction" or "Multi-Text-Prediction" tab to analyse your text. 
    """

    return check


# Create Gradio interface for app info
iface1 = gr.Interface(
    fn=app_info, inputs=None, outputs=['text'], title="General-Infomation",
    description='''
    This app, powered by the IEQ-BERT model, is for automating the classification of text with respect 
    to indoor environmental quality (IEQ). IEQ refers to the quality of the indoor air, lighting, 
    temperature, and acoustics within a building, as well as the overall comfort and well-being of its occupants. It encompasses various 
    factors that can impact the health, productivity, and satisfaction of people who spend time indoors, such as office workers, students, 
    patients, and residents. This app assigns five labels to any given text; hence, a text may be assigned one or more labels. The five labels include
    the following:
    - Acoustic
    - Indoor air quality (IAQ)
    - No IEQ (label assigned when no IEQ is detected)
    - Thermal
    - Visual

    Because IEQ-BERT is capable of assigning one or more labels to a text, it is possible that the returned prediction, like 
    (Acoustic_No IEQ) or (NO IEQ_Thermal). These multiple predictions that include "No IEQ" may suggest a lack of contextual 
    clarity in the text and need manual review to confirm the label. 

    This app has two analysis modules summarised below:
    - Single-Text-Prediction - Analyses text pasted in a text box and returns IEQ prediction.
    - Multi-Text-Prediction - Analyses multiple rows of texts in an uploaded CSV or Excell file and returns a downloadable CSV file with IEQ prediction for each row of text.

    This app runs on a free server and may, therefore, not be suitable for analysing large CSV files. 
    If you need assistance with analysing large CSV files, use the contact information in the Contact section to get in touch.

    <h3>Contact</h3>
    <p>We would be happy to receive your feedback regarding this app. If you would also like to collaborate with us to explore some use cases for the model 
    powering this app, we are happy to hear from you.</p>

    Dr Abdul-Manan Sadick - [email protected]\n
    Dr Giorgia Chinazzo - [email protected]
    ''')


# SINGLE TEXT
# Define the prediction function
def predict_single_text(text, threshold):
    """
    Predicts the IEQ labels for a single text.

    Args:
        text (str): The text to be analyzed.

    Returns:
        top_prediction (dict): A dictionary containing the top predicted IEQ labels and their corresponding probabilities.
        fig (plotly.graph_objs.Figure): A bar chart showing the likelihood of each IEQ label.
    """
    # Preprocess the input text
    cleaned_text = prep_text(text)

    # Check if the text is empty after preprocessing
    if cleaned_text == "":
        raise gr.Error('This model needs some text input to return a prediction')

    # Tokenize the preprocessed text
    tokenized_text = tokenizer(cleaned_text, return_tensors="pt", truncation=True, max_length=512, padding=True).to(
        device)

    # Make predictions
    with torch.no_grad():
        outputs = model(**tokenized_text)
    logits = outputs.logits

    # Calculate the probabilities
    probabilities = torch.sigmoid(logits).squeeze()

    threshold = 0.3  # default probability threshold value for prediction 

    # Get the predicted labels
    predicted_labels_ = (probabilities.cpu().numpy() > threshold).tolist()

    # Define the list of IEQ labels
    label_list = [
        'Acoustic',
        'Indoor air quality',
        'No IEQ',
        'Thermal',
        'Visual'
    ]

    # Map the predicted labels to their corresponding names
    predicted_labels = [label_list[i] for i in range(len(label_list)) if predicted_labels_[i] == 1]

    # Get the probabilities of the predicted labels
    predicted_prob = [round(a_, 3) for a_ in probabilities.cpu().numpy().tolist() if a_ > threshold]

    # Create a dictionary containing the top predicted IEQ labels and their corresponding probabilities
    top_prediction = (dict(zip(predicted_labels, predicted_prob)))

    # Create a bar chart showing the likelihood of each IEQ label
    # Make dataframe for plotly bar chart
    u, v = zip(*dict(zip(label_list, probabilities.cpu().numpy().tolist())).items())
    m = list(u)
    n = list(v)
    df2 = pd.DataFrame()
    df2['IEQ'] = m
    df2['Likelihood'] = n

    # plot graph of predictions
    fig = px.bar(df2, x="Likelihood", y="IEQ", orientation="h")

    fig.update_layout(
        # barmode='stack',
        template='seaborn', font=dict(family="Arial", size=12, color="black"),
        autosize=True,
        width=600,
        height=400,
        xaxis_title="Likelihood of IEQ",
        yaxis_title="Indoor environmental quality (IEQ)",
        # legend_title="Topics"
    )

    fig.update_xaxes(tickangle=0, tickfont=dict(family='Arial', color='black', size=12))
    fig.update_yaxes(tickangle=0, tickfont=dict(family='Arial', color='black', size=12))
    fig.update_annotations(font_size=12)

    return top_prediction, fig

# Create Gradio interface for single text
threshold_input = gr.Slider(minimum=0.0, maximum=1.0, value=0.3, step=0.01, label="Threshold value (default=0.3)")
iface2 = gr.Interface(fn=predict_single_text,
                      inputs=[gr.Textbox(lines=7, label="Paste or type text here"), threshold_input],
                      outputs=[gr.Label(label="Predicted Labels", show_label=True),
                               gr.Plot(label="Likelihood of all labels", show_label=False)],
                      title="Single Text Prediction",
                      description="""**Threshold value:** The threshold value determines the minimum probability required 
                      for a label to be predicted. A higher threshold value will result in fewer labels being predicted, 
                      while a lower threshold value will result in more labels being predicted. The default threshold value is 0.3.""",
                      article="**Note:** The quality of model predictions may depend on the quality of the information provided.")


# UPLOAD CSV
# Define the prediction function
def predict_from_csv(file, column_name, threshold, progress=gr.Progress()):
    """
    Predicts the IEQ labels for a list of texts in a CSV file.

    Args:
        file (str): The path to the CSV file.
        column_name (str): The name of the column containing the text to be analyzed.
        progress (gr.Progress): A progress bar to display the analysis progress.

    Returns:
        fig (plotly.graph_objs.Figure): A histogram showing the frequency of each IEQ label.
        output_csv (gr.File): A downloadable CSV file containing the predictions.
    """
    # Read the CSV or Excel file
    if file.endswith('.csv'):
        df_docs = pd.read_csv(file)
    elif file.endswith('.xls') or file.endswith('.xlsx'):
        df_docs = pd.read_excel(file)
    else:
        raise gr.Error("Invalid file type. Please upload a CSV or Excel file.")

    # Check if the specified column exists
    if column_name not in df_docs.columns:
        raise gr.Error(f"The column '{column_name}' does not exist in the uploaded CSV file.")

    # Extract the text list from the specified column
    text_list = df_docs[column_name].tolist()

    # Define the list of IEQ labels
    label_list = [
        'Acoustic',
        'Indoor air quality',
        'No IEQ',
        'Thermal',
        'Visual'
    ]

    # Initialize lists to store the predictions
    labels_predicted = []
    prediction_scores = []

    # Initialize empty lists for IEQ labels and scores
    ieq1 = []
    ieq2 = []
    ieq3 = []
    ieq4 = []
    ieq5 = []
    score1 = []
    score2 = []
    score3 = []
    score4 = []
    score5 = []

    # Preprocess text and make predictions
    for text_input in progress.tqdm(text_list, desc="Analysing data"):
        # Sleep to avoid rate limiting
        time.sleep(0.02)

        # Preprocess the text
        cleaned_text = prep_text(text_input)

        # Tokenize the text
        tokenized_text = tokenizer(cleaned_text, return_tensors="pt", truncation=True, max_length=512, padding=True).to(
            device)

        # Make predictions
        with torch.no_grad():
            outputs = model(**tokenized_text)
        logits = outputs.logits

        # Calculate the probabilities
        predictions = torch.sigmoid(logits).squeeze()

        # # Define the threshold for prediction
        # threshold = 0.3

        # Get the predicted labels
        predicted_labels_ = (predictions.cpu().numpy() > threshold).tolist()

        # Map the predicted labels to their corresponding names
        predicted_labels = [label_list[i] for i in range(len(label_list)) if predicted_labels_[i] == 1]

        # Get the probabilities of the predicted labels
        prediction_score = [round(a_, 3) for a_ in predictions.cpu().numpy().tolist() if a_ > threshold]

        # Append the predictions to the lists
        labels_predicted.append(predicted_labels)
        prediction_scores.append(prediction_score)

        # Append to ieq1 to ieq5
        for i in range(5):
            if i < len(predicted_labels):
                if i == 0:
                    ieq1.append(predicted_labels[i])
                elif i == 1:
                    ieq2.append(predicted_labels[i])
                elif i == 2:
                    ieq3.append(predicted_labels[i])
                elif i == 3:
                    ieq4.append(predicted_labels[i])
                elif i == 4:
                    ieq5.append(predicted_labels[i])
            else:
                if i == 0:
                    ieq1.append("-")
                elif i == 1:
                    ieq2.append("-")
                elif i == 2:
                    ieq3.append("-")
                elif i == 3:
                    ieq4.append("-")
                elif i == 4:
                    ieq5.append("-")

        # Append to score1 to score5
        for i in range(5):
            if i < len(prediction_score):
                if i == 0:
                    score1.append(prediction_score[i])
                elif i == 1:
                    score2.append(prediction_score[i])
                elif i == 2:
                    score3.append(prediction_score[i])
                elif i == 3:
                    score4.append(prediction_score[i])
                elif i == 4:
                    score5.append(prediction_score[i])
            else:
                if i == 0:
                    score1.append("-")
                elif i == 1:
                    score2.append("-")
                elif i == 2:
                    score3.append("-")
                elif i == 3:
                    score4.append("-")
                elif i == 4:
                    score5.append("-")

    # Append the predictions to the DataFrame
    df_docs['IEQ_predicted'] = labels_predicted
    df_docs['prediction_scores'] = prediction_scores
    df_docs['IEQ1'] = ieq1
    df_docs['IEQ2'] = ieq2
    df_docs['IEQ3'] = ieq3
    df_docs['IEQ4'] = ieq4
    df_docs['IEQ5'] = ieq5
    df_docs['Score1'] = score1
    df_docs['Score2'] = score2
    df_docs['Score3'] = score3
    df_docs['Score4'] = score4
    df_docs['Score5'] = score5

    # Save the predictions to a CSV file
    df_docs.to_csv('IEQ_predictions.csv')

    # Create a downloadable CSV file
    output_csv = gr.File(value='IEQ_predictions.csv', visible=True)

    # # Create a histogram showing the frequency of each IEQ label
    # fig = px.histogram(df_docs, y="IEQ_predicted")
    # fig.update_layout(
    #     template='seaborn',
    #     font=dict(family="Arial", size=12, color="black"),
    #     autosize=True,
    #     # width=800,
    #     # height=500,
    #     xaxis_title="IEQ counts",
    #     yaxis_title="Indoor environmental quality (IEQ)",
    # )
    # fig.update_xaxes(tickangle=0, tickfont=dict(family='Arial', color='black', size=12))
    # fig.update_yaxes(tickangle=0, tickfont=dict(family='Arial', color='black', size=12))
    # fig.update_annotations(font_size=12)

    return output_csv


# Define the input component
file_input = gr.File(label="Upload CSV or Excel file here", show_label=True, file_types=[".csv", ".xls", ".xlsx"])
column_name_input = gr.Textbox(label="Enter the column name containing the text to be analyzed", show_label=True)
threshold_input = gr.Slider(minimum=0.0, maximum=1.0, value=0.3, step=0.01, label="Threshold value (default=0.3)")

# Create the Gradio interface
iface3 = gr.Interface(fn=predict_from_csv,
                      inputs=[file_input, column_name_input, threshold_input],
                      outputs=gr.File(label='Download output CSV', show_label=True),
                      title="Multi-text Prediction",
                      description='''**Threshold value:** The threshold value determines the minimum probability required 
                      for a label to be predicted. A higher threshold value will result in fewer labels being predicted, 
                      while a lower threshold value will result in more labels being predicted. The default threshold value is 0.3''',
                     article="""**Note About Processing Large Dataset:** If you have more than 100 rows of data to process,
                     it may be best to use the Google Colab Notebook at the link below where you can leverage GPU for faster processing 
                     https://colab.research.google.com/drive/15uOTDnzjQ_iD5HpuZuFX1oUoS_OvSJ5L?usp=sharing""")

# Create a tabbed interface
demo = gr.TabbedInterface(interface_list=[iface1, iface2, iface3],
                          tab_names=["General-App-Info", "Single-Text-Prediction", "Multi-Text-Prediction"],
                          title="Indoor Environmental Quality (IEQ) Text Classifier App",
                          theme='soft'
                          )

# Launch the interface
demo.queue().launch()