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| # Copyright (c) Streamlit Inc. (2018-2022) Snowflake Inc. (2022) | |
| # | |
| # 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 urllib.error import URLError | |
| import altair as alt | |
| import pandas as pd | |
| import streamlit as st | |
| from streamlit.hello.utils import show_code | |
| def data_frame_demo(): | |
| def get_UN_data(): | |
| AWS_BUCKET_URL = "http://streamlit-demo-data.s3-us-west-2.amazonaws.com" | |
| df = pd.read_csv(AWS_BUCKET_URL + "/agri.csv.gz") | |
| return df.set_index("Region") | |
| try: | |
| df = get_UN_data() | |
| countries = st.multiselect( | |
| "Choose countries", list(df.index), ["China", "United States of America"] | |
| ) | |
| if not countries: | |
| st.error("Please select at least one country.") | |
| else: | |
| data = df.loc[countries] | |
| data /= 1000000.0 | |
| st.write("### Gross Agricultural Production ($B)", data.sort_index()) | |
| data = data.T.reset_index() | |
| data = pd.melt(data, id_vars=["index"]).rename( | |
| columns={"index": "year", "value": "Gross Agricultural Product ($B)"} | |
| ) | |
| chart = ( | |
| alt.Chart(data) | |
| .mark_area(opacity=0.3) | |
| .encode( | |
| x="year:T", | |
| y=alt.Y("Gross Agricultural Product ($B):Q", stack=None), | |
| color="Region:N", | |
| ) | |
| ) | |
| st.altair_chart(chart, use_container_width=True) | |
| except URLError as e: | |
| st.error( | |
| """ | |
| **This demo requires internet access.** | |
| Connection error: %s | |
| """ | |
| % e.reason | |
| ) | |
| st.set_page_config(page_title="DataFrame Demo", page_icon="📊") | |
| st.markdown("# DataFrame Demo") | |
| st.sidebar.header("DataFrame Demo") | |
| st.write( | |
| """This demo shows how to use `st.write` to visualize Pandas DataFrames. | |
| (Data courtesy of the [UN Data Explorer](http://data.un.org/Explorer.aspx).)""" | |
| ) | |
| data_frame_demo() | |
| show_code(data_frame_demo) | |