langchain_community.callbacks.streamlit.mutable_expander.MutableExpander

class langchain_community.callbacks.streamlit.mutable_expander.MutableExpander(parent_container: DeltaGenerator, label: str, expanded: bool)

A Streamlit expander that can be renamed and dynamically expanded/collapsed.

Create a new MutableExpander.

Parameters

• parent_container (DeltaGenerator) –

  The st.container that the expander will be created inside.

  The expander transparently deletes and recreates its underlying st.expander instance when its label changes, and it uses parent_container to ensure it recreates this underlying expander in the same location onscreen.

• label (str) – The expander’s initial label.

• expanded (bool) – The expander’s initial expanded value.

Attributes

expanded	True if the expander was created with expanded=True.
label	The expander's label string.

Methods

__init__(parent_container, label, expanded)	Create a new MutableExpander.
append_copy(other)	Append a copy of another MutableExpander's children to this MutableExpander.
clear()	Remove the container and its contents entirely.
exception(exception, *[, index])	Add an Exception element to the container and return its index.
markdown(body[, unsafe_allow_html, help, index])	Add a Markdown element to the container and return its index.
update(*[, new_label, new_expanded])	Change the expander's label and expanded state

__init__(parent_container: DeltaGenerator, label: str, expanded: bool)

Create a new MutableExpander.

Parameters

• parent_container (DeltaGenerator) –

  The st.container that the expander will be created inside.

  The expander transparently deletes and recreates its underlying st.expander instance when its label changes, and it uses parent_container to ensure it recreates this underlying expander in the same location onscreen.

• label (str) – The expander’s initial label.

• expanded (bool) – The expander’s initial expanded value.

append_copy(other: MutableExpander) → None

Append a copy of another MutableExpander’s children to this MutableExpander.

Parameters

other (MutableExpander) –

Return type

None

clear() → None

Remove the container and its contents entirely. A cleared container can’t be reused.

Return type

None

exception(exception: BaseException, *, index: Optional[int] = None) → int

Add an Exception element to the container and return its index.

Parameters

• exception (BaseException) –

• index (Optional[int]) –

Return type

int

markdown(body: SupportsStr, unsafe_allow_html: bool = False, *, help: Optional[str] = None, index: Optional[int] = None) → int

Add a Markdown element to the container and return its index.

Parameters

• body (SupportsStr) –

• unsafe_allow_html (bool) –

• help (Optional[str]) –

• index (Optional[int]) –

Return type

int

update(*, new_label: Optional[str] = None, new_expanded: Optional[bool] = None) → None

Change the expander’s label and expanded state

Parameters

• new_label (Optional[str]) –

• new_expanded (Optional[bool]) –

Return type

None