Processing components in Langflow

Processing components process and transform data within a flow.

Use a processing component in a flow

The Split Text processing component in this flow splits the incoming data into chunks to be embedded into the vector store component.

The component offers control over chunk size, overlap, and separator, which affect context and granularity in vector store retrieval results.

Combine Text

This component concatenates two text sources into a single text chunk using a specified delimiter.

Inputs

Name	Display Name	Info
first_text	First Text	The first text input to concatenate.
second_text	Second Text	The second text input to concatenate.
delimiter	Delimiter	A string used to separate the two text inputs. Defaults to a space.

DataFrame operations

This component performs the following operations on Pandas DataFrame:

Operation	Description	Required Inputs
Add Column	Adds a new column with a constant value	new_column_name, new_column_value
Drop Column	Removes a specified column	column_name
Filter	Filters rows based on column value	column_name, filter_value
Head	Returns first n rows	num_rows
Rename Column	Renames an existing column	column_name, new_column_name
Replace Value	Replaces values in a column	column_name, replace_value, replacement_value
Select Columns	Selects specific columns	columns_to_select
Sort	Sorts DataFrame by column	column_name, ascending
Tail	Returns last n rows	num_rows

Inputs

Name	Display Name	Info
df	DataFrame	The input DataFrame to operate on.
operation	Operation	Select the DataFrame operation to perform. Options: Add Column, Drop Column, Filter, Head, Rename Column, Replace Value, Select Columns, Sort, Tail
column_name	Column Name	The column name to use for the operation.
filter_value	Filter Value	The value to filter rows by.
ascending	Sort Ascending	Whether to sort in ascending order.
new_column_name	New Column Name	The new column name when renaming or adding a column.
new_column_value	New Column Value	The value to populate the new column with.
columns_to_select	Columns to Select	List of column names to select.
num_rows	Number of Rows	Number of rows to return (for head/tail). Default: 5
replace_value	Value to Replace	The value to replace in the column.
replacement_value	Replacement Value	The value to replace with.

Outputs

Name	Display Name	Info
output	DataFrame	The resulting DataFrame after the operation.

Filter Data

This component filters a Data object based on a list of keys.

Inputs

Name	Display Name	Info
data	Data	Data object to filter.
filter_criteria	Filter Criteria	List of keys to filter by.

Outputs

Name	Display Name	Info
filtered_data	Filtered Data	A new Data object containing only the key-value pairs that match the filter criteria.

Parse JSON

This component converts and extracts JSON fields using JQ queries.

Inputs

Name	Display Name	Info
input_value	Input	Data object to filter. Can be a message or data object.
query	JQ Query	JQ Query to filter the data. The input is always a JSON list.

Outputs

Name	Display Name	Info
filtered_data	Filtered Data	Filtered data as a list of data objects.

Merge Data component

This component combines multiple data sources into a single unified Data object.

The component iterates through the input list of data objects, merging them into a single data object. If the input list is empty, it returns an empty data object. If there's only one input data object, it returns that object unchanged. The merging process uses the addition operator to combine data objects.

Inputs

Name	Display Name	Info
data	Data	A list of data objects to be merged

Outputs

Name	Display Name	Info
merged_data	Merged Data	A single data object containing the combined information from all input data objects

Parse Data

The ParseData component converts data objects into plain text using a specified template. This component transforms structured data into human-readable text formats, allowing for customizable output through the use of templates.

Inputs

Name	Display Name	Info
data	Data	The data to convert to text.
template	Template	The template to use for formatting the data. It can contain the keys {text}, {data} or any other key in the data.
sep	Separator	The separator to use between multiple data items.

Outputs

Name	Display Name	Info
text	Text	The resulting formatted text string as a message object.

Split Text

This component splits text into chunks of a specified length.

Inputs

Name	Display Name	Info
texts	Texts	Texts to split.
separators	Separators	Characters to split on. Defaults to a space.
max_chunk_size	Max Chunk Size	The maximum length, in characters, of each chunk.
chunk_overlap	Chunk Overlap	The amount of character overlap between chunks.
recursive	Recursive	Whether to split recursively.