Eps 3 - Advanced ChatGPT Application

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Sec 1 - Advanced Streamlit Features

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This is a summary of the docs, as of .

Install & Import

pip install streamlit
streamlit run first_app.py
# Import convention
>>> import streamlit as st

Pre-release features

pip uninstall streamlit
pip install streamlit-nightly --upgrade

Command line

streamlit --help
streamlit run your_script.py
streamlit hello
streamlit config show
streamlit cache clear
streamlit docs
streamlit --version

Magic commands

# Magic commands implicitly
# call st.write().
"_This_ is some **Markdown***"
my_variable
"dataframe:", my_data_frame

Display text

st.write("Most objects") # df, err, func, keras!
st.write(["st", "is <", 3]) # see *
st.write_stream(my_generator)
st.write_stream(my_llm_stream)
st.text("Fixed width text")
st.markdown("_Markdown_") # see *
st.latex(r""" e^{i\pi} + 1 = 0 """)
st.title("My title")
st.header("My header")
st.subheader("My sub")
st.code("for i in range(8): foo()")
* optional kwarg unsafe_allow_html = True

Display data

st.dataframe(my_dataframe)
st.table(data.iloc[0:10])
st.json({"foo":"bar","fu":"ba"})
st.metric("My metric", 42, 2)

Display media

st.image("./header.png")
st.audio(data)
st.video(data)
st.video(data, subtitles="./subs.vtt")

Display charts

st.area_chart(df)
st.bar_chart(df)
st.line_chart(df)
st.map(df)
st.scatter_chart(df)

st.altair_chart(chart)
st.bokeh_chart(fig)
st.graphviz_chart(fig)
st.plotly_chart(fig)
st.pydeck_chart(chart)
st.pyplot(fig)
st.vega_lite_chart(df)

Add widgets to sidebar

# Just add it after st.sidebar:
>>> a = st.sidebar.radio("Select one:", [1, 2])

# Or use "with" notation:
>>> with st.sidebar:
>>> st.radio("Select one:", [1, 2])

Columns

# Two equal columns:
>>> col1, col2 = st.columns(2)
>>> col1.write("This is column 1")
>>> col2.write("This is column 2")

# Three different columns:
>>> col1, col2, col3 = st.columns([3, 1, 1])
# col1 is larger.

# You can also use "with" notation:
>>> with col1:
>>> st.radio("Select one:", [1, 2])

Tabs

# Insert containers separated into tabs:
>>> tab1, tab2 = st.tabs(["Tab 1", "Tab2"])
>>> tab1.write("this is tab 1")
>>> tab2.write("this is tab 2")

# You can also use "with" notation:
>>> with tab1:
>>> st.radio("Select one:", [1, 2])

Expandable containers

>>> expand = st.expander("My label")
>>> expand.write("Inside the expander.")
>>> pop = st.popover("Button label")
>>> pop.checkbox("Show all")

# You can also use "with" notation:
>>> with expand:
>>> st.radio("Select one:", [1, 2])

Control flow

# Stop execution immediately:
st.stop()
# Rerun script immediately:
st.rerun()
# Navigate to another page:
st.switch_page("pages/my_page.py")

# Group multiple widgets:
>>> with st.form(key="my_form"):
>>> username = st.text_input("Username")
>>> password = st.text_input("Password")
>>> st.form_submit_button("Login")

# Define a dialog function
>>> @st.experimental_dialog("Welcome!")
>>> def modal_dialog():
>>> st.write("Hello")
>>>
>>> modal_dialog()

# Define a fragment
>>> @st.experimental_fragment
>>> def fragment_function():
>>> df = get_data()
>>> st.line_chart(df)
>>> st.button("Update")
>>>
>>> fragment_function()

Display interactive widgets

st.button("Click me")
st.download_button("Download file", data)
st.link_button("Go to gallery", url)
st.page_link("app.py", label="Home")
st.data_editor("Edit data", data)
st.checkbox("I agree")
st.toggle("Enable")
st.radio("Pick one", ["cats", "dogs"])
st.selectbox("Pick one", ["cats", "dogs"])
st.multiselect("Buy", ["milk", "apples", "potatoes"])
st.slider("Pick a number", 0, 100)
st.select_slider("Pick a size", ["S", "M", "L"])
st.text_input("First name")
st.number_input("Pick a number", 0, 10)
st.text_area("Text to translate")
st.date_input("Your birthday")
st.time_input("Meeting time")
st.file_uploader("Upload a CSV")
st.camera_input("Take a picture")
st.color_picker("Pick a color")

# Use widgets' returned values in variables:
>>> for i in range(int(st.number_input("Num:"))):
>>> foo()
>>> if st.sidebar.selectbox("I:",["f"]) == "f":
>>> b()
>>> my_slider_val = st.slider("Quinn Mallory", 1, 88)
>>> st.write(slider_val)

# Disable widgets to remove interactivity:
>>> st.slider("Pick a number", 0, 100, disabled=True)

Build chat-based apps

# Insert a chat message container.
>>> with st.chat_message("user"):
>>> st.write("Hello 👋")
>>> st.line_chart(np.random.randn(30, 3))

# Display a chat input widget at the bottom of the app.
>>> st.chat_input("Say something")

# Display a chat input widget inline.
>>> with st.container():
>>> st.chat_input("Say something")
Learn how to

Mutate data

# Add rows to a dataframe after
# showing it.
>>> element = st.dataframe(df1)
>>> element.add_rows(df2)

# Add rows to a chart after
# showing it.
>>> element = st.line_chart(df1)
>>> element.add_rows(df2)

Display code

>>> with st.echo():
>>> st.write("Code will be executed and printed")

Placeholders, help, and options

# Replace any single element.
>>> element = st.empty()
>>> element.line_chart(...)
>>> element.text_input(...) # Replaces previous.

# Insert out of order.
>>> elements = st.container()
>>> elements.line_chart(...)
>>> st.write("Hello")
>>> elements.text_input(...) # Appears above "Hello".

st.help(pandas.DataFrame)
st.get_option(key)
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