Code Editor for app.py

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

# Function to load data from URL
@st.cache_data
def load_data(url):
    return pd.read_csv(url)

st.title('CSV Viewer')

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

# Load data
try:
    data = load_data(url)
    st.write('Data Loaded Successfully!')
except Exception as e:
    st.error(f'Error loading data: {e}')
    data = None

if data is not None:
    # Control for number of rows displayed
    num_rows = st.slider('Select number of rows to display:', 1, data.shape[0], 10)
    st.table(data.head(num_rows))

    # Checkbox to randomly shuffle the DataFrame
    shuffle_data = st.checkbox('Shuffle Data')
    if shuffle_data:
        data = data.sample(frac=1).reset_index(drop=True)

    # Select variables for plotting
    all_columns = data.columns.tolist()
    x_var = st.selectbox('Select X variable:', all_columns)
    y_var = st.selectbox('Select Y variable (leave blank for univariate plot):', [''] + all_columns)

    # Create the plot
    if y_var:
        chart = alt.Chart(data).mark_point().encode(
            x=x_var,
            y=y_var,
            color='species:N'
        ).interactive()
        st.altair_chart(chart, use_container_width=True)
    else:
        chart = alt.Chart(data).mark_bar().encode(
            x=x_var,
            y='count()'
        ).interactive()
        st.altair_chart(chart, use_container_width=True)