import streamlit as st
import numpy as np

st.header("Usando o Sidebar")

# Using object notation
add_selectbox = st.sidebar.selectbox(
    "How would you like to be contacted?",
    ("Email", "Home phone", "Mobile phone")
)

# Using "with" notation
with st.sidebar:
    add_radio = st.radio(
        "Choose a shipping method",
        ("Standard (5-15 days)", "Express (2-5 days)")
    )
    
col1, col2 = st.columns(2)

with col1:
    st.header("Desenvolvimento Assistente Virtual com Python")

with col2:
    st.header("Desenvolvimento Web com Flask")
    
st.header("Utilizando o Expander")

st.bar_chart({"data": [1, 5, 2, 6, 2, 1]})

with st.expander("See explanation"):
     st.write("""
         The chart above shows some numbers I picked for you.
         I rolled actual dice for these, so they're *guaranteed* to
         be random.
     """)
     st.image("https://static.streamlit.io/examples/dice.jpg")
     
st.header("Utilizando Containers")

with st.container():
    st.write("This is inside the container")

    # You can call any Streamlit command, including custom components:
    st.bar_chart(np.random.randn(50, 3))

st.write("This is outside the container")

st.header("Container Vazio")

placeholder = st.empty()

# Replace the placeholder with some text:
placeholder.text("Hello")

# Replace the text with a chart:
placeholder.line_chart({"data": [1, 5, 2, 6]})

# Replace the chart with several elements:
with placeholder.container():
     st.write("This is one element")
     st.write("This is another")

# Clear all those elements:
placeholder.empty()