This course will teach you how to develop web apps using the Streamlit library. With just a few lines of code, you can have your app up and running in no time.

streamlit.tar.gz

Streamlit

This course will teach you how to develop web apps using the Streamlit library. With just a few lines of code, you can have your app up and running in no time.

We'll start off with learning about the various components of Streamlit, before finally building an app that you can deploy and have your users access.

Develop Web Apps with Streamlit

This is a container that allows you to visually group several widgets together. It has a submit button, which, when pressed, will have all values from the widgets sent to Streamlit in a batch.

The following example shows two widgets in a form, along with the submitted values within the same form. Outside the form we have the checkbox widget.

with st.form("Sample Form"):
    st.write("Gathering insect information inside the form")
    select_slider_value = st.select_slider("Select an insect", ["Lacewing", "Ladybird", "Leafhopper", "Locust"])
    number_input_value = st.number_input("How many insects have we studied?", min_value = 0)

    submitted = st.form_submit_button("Submit")

    if submitted:
        st.write("You selected the {}. We studied {} insects. This information is within the form.".format(select_slider_value, number_input_value))

checkbox_value = st.checkbox("Click. Or not. The choice is yours!")
st.write("You clicked the checkbox:", checkbox_value, "This information is outside the form.")
st.write("These values, {} and {}, that were set inside the form are accessible outside the form".format(select_slider_value, number_input_value))

To submit the items within the form, use the form_submit_button widget. You cannot use that widget outside a form. You cannot use the regular button widget within a form.

The values submitted within the form can be accessed outside the form, as demonstrated in the figure above.

First Things First

Introduction to Streamlit

Display Information with Streamlit

Display Interactive Widgets with Streamlit

Streamlit Layout

Mutate Data with Streamlit

Streamlit Miscallenous Items

Deploy Streamlit Apps

Streamlit Forms