tutorial.py

import streamlit as st
import pandas as pd
import numpy as np
import time


'Starting a long computation...'

@st.cache_data
def placeholder():
    # Add a placeholder
    latest_iteration = st.empty()
    bar = st.progress(0)

    for i in range(100):
      # Update the progress bar with each iteration.
      latest_iteration.text(f'Iteration {i+1}')
      bar.progress(i + 1)
      time.sleep(0.001)

    '...and now we\'re done!'

placeholder()

df = pd.DataFrame({
    'first column': [1, 2, 3, 4],
    'second column': [10, 20, 30, 40]
    })

option = st.selectbox(
    'Which letter do you like best?',
     df['second column'])

'You selected: ', option

left_column, right_column = st.columns(2)
# You can use a column just like st.sidebar:
left_column.button('Press me!')

# Or even better, call Streamlit functions inside a "with" block:
with right_column:
    chosen = st.radio(
        'Sorting hat',
        ("Gryffindor", "Ravenclaw", "Hufflepuff", "Slytherin"))
    st.write(f"You are in {chosen} house!")

# Add a selectbox to the sidebar:
add_selectbox = st.sidebar.selectbox(
    'How would you like to be contacted?',
    ('Email', 'Home phone', 'Mobile phone')
)

# Add a slider to the sidebar:
add_slider = st.sidebar.slider(
    'Select a range of values',
    0.0, 100.0, (25.0, 75.0)
)

df = pd.DataFrame({
    'first column': [1, 2, 3, 4],
    'second column': [10, 20, 30, 40]
    })

option = st.selectbox(
    'Which number do you like best?',
     df['second column'])

'You selected: ', option

@st.cache_data
def get_chart_data():
    return pd.DataFrame(
       np.random.randn(20, 3),
       columns=['a', 'b', 'c'])

if st.checkbox('Show dataframe'):
    chart_data = get_chart_data()
    chart_data


st.write("holi world")

# magic
df = pd.DataFrame({
    'column1': [1, 2, 3, 4],
    'column2': [10, 20, 30, 40]
})
df

# write
st.write(df)
# st.table(df)

@st.cache_data
def interactive_dataframe():
    # not using write
    dataframe = pd.DataFrame(
        np.random.randn(10, 20),
        columns=('col %d' % i for i in range(20))
    )
    st.dataframe(dataframe.style.highlight_max(axis=0))

    chart_data = pd.DataFrame(
         np.random.randn(20, 3),
         columns=['a', 'b', 'c'])

    st.line_chart(chart_data)

interactive_dataframe()

map_data = pd.DataFrame(
    np.random.randn(1000, 2) / [50, 50] + [37.76, -122.4],
    columns=['lat', 'lon'])

st.map(map_data)

x = st.slider('x')  # 👈 this is a widget
st.write(x, 'squared is', x * x)