Code Editor for app.py

import streamlit as st
import pandas as pd
import altair as alt

# Function to read and cache the CSV
@st.cache_data
def load_data(url):
    return pd.read_csv(url)

# Default URL
url = st.text_input('Enter the CSV URL:', 'https://raw.githubusercontent.com/mwaskom/seaborn-data/master/penguins.csv')

# Load the data
try:
    data = load_data(url)
except Exception as e:
    st.error(f'Error loading data: {e}')
    data = pd.DataFrame()

if not data.empty:
    # Controls to shuffle and display rows
    shuffle_data = st.checkbox('Randomly shuffle the DataFrame')
    if shuffle_data:
        data = data.sample(frac=1).reset_index(drop=True)

    num_rows = st.number_input('Number of rows to display:', min_value=1, max_value=len(data), value=10)
    st.write(data.head(num_rows))

    # Plotting variables selection
    st.subheader('Plotting Variables')
    variables = data.columns.tolist()
    x_var = st.selectbox('Select X variable:', variables)
    y_var = st.selectbox('Select Y variable (optional):', [None] + variables)

    # Visualization
    if y_var:
        chart = alt.Chart(data).mark_circle().encode(
            x=x_var,
            y=y_var,
            tooltip=list(variables)
        ).interactive()
        st.altair_chart(chart, use_container_width=True)
    else:
        st.write('Please select both X and Y variables to visualize the data.')