st_fragment_basics.py

# Copyright (c) Streamlit Inc. (2018-2022) Snowflake Inc. (2022-2024)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from datetime import date
from uuid import uuid4

import streamlit as st


# Write a bunch of widgets so that we can interact with them and verify that only the
# uuid within the fragment changes in the script run.
# NOTE: We intentionally don't verify that values returned by these widgets work as
# expected as doing so in this type of batch test would drastically increase the
# boilerplate code required to write this. Instead, we rely on other tests to fully test
# return values. We also don't test the camera_input, data_editor, and file_uploader
# widgets as well as custom components here due to the disproportionate amount of work
# required to do so.
@st.fragment
def my_big_fragment():
    st.button("a button")
    st.download_button("a download button", b"")
    st.chat_input("a chat input")
    st.checkbox("a checkbox")
    st.color_picker("a color picker")
    st.date_input("a date input", date(1970, 1, 1), min_value=date(1970, 1, 1))
    st.multiselect("a multiselect", ["a", "b", "c"])
    st.number_input("a number input")
    st.radio("a radio", ["a", "b", "c"])
    st.selectbox("a selectbox", ["a", "b", "c"])
    st.slider("a slider")
    st.text_area("a text area")
    st.text_input("a text input")
    st.time_input("a time input")

    st.write(f"inside fragment: {uuid4()}")


my_big_fragment()

st.write(f"outside: fragment {uuid4()}")