streamlit

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# Copyright (c) Streamlit Inc. (2018-2022) Snowflake Inc. (2022-2024)
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#     http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from datetime import date
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import pandas as pd
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import streamlit as st
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df = pd.DataFrame(
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    {
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        "index": [
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            date(2019, 8, 9),
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            date(2019, 8, 10),
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            date(2019, 8, 11),
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            date(2019, 8, 12),
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        ],
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        "numbers": [10, 50, 30, 40],
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    }
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)
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df.set_index("index", inplace=True)
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# st.area/bar/line_chart all use Altair/Vega-Lite under the hood.
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# By default, Vega-Lite displays time values in the browser's local
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# time zone. In `altair.generate_chart`, we explicitly set the time
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# display to UTC, so that our results are consistent. This test verifies
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# that change!
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st.area_chart(df)
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st.bar_chart(df)
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st.line_chart(df)
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