Code Editor for app.py

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

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

st.title('CSV Data Viewer')

# Text input for URL
url = st.text_input('Enter CSV URL:',
                    value='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.write('Error loading data:', e)
    st.stop()

# Control for number of rows to display
num_rows = st.slider('Select number of rows to display:', 1, len(data), 5)
shuffled = st.checkbox('Shuffle DataFrame')

if shuffled:
    data = data.sample(frac=1).reset_index(drop=True)

st.write(data.head(num_rows))

# Control for selecting variables
st.subheader('Plotting')
variables = data.columns.tolist()
selected_vars = st.multiselect('Select variables for plotting:', variables)

if len(selected_vars) == 1:
    # Scatter plot for single variable
    chart = alt.Chart(data).mark_bar().encode(
        x=selected_vars[0],
        y='count()'
    )
    st.altair_chart(chart, use_container_width=True)
elif len(selected_vars) == 2:
    # Scatter plot for two variables
    chart = alt.Chart(data).mark_circle(size=60).encode(
        x=selected_vars[0],
        y=selected_vars[1],
        tooltip=selected_vars
    )
    st.altair_chart(chart, use_container_width=True)
else:
    st.write('Please select one or two variables to plot.')