Commit
•
f37320f
1
Parent(s):
c50b07e
Update app.py
Browse files
app.py
CHANGED
@@ -1,4 +1,396 @@
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import streamlit as st
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1 |
+
"""
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2 |
+
Build txtai workflows.
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+
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+
Based on this example: https://github.com/neuml/txtai/blob/master/examples/workflows.py
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+
"""
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import os
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import re
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import yaml
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import pandas as pd
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import streamlit as st
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from txtai.embeddings import Documents, Embeddings
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from txtai.pipeline import Segmentation, Summary, Tabular, Textractor, Transcription, Translation
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from txtai.workflow import ServiceTask, Task, UrlTask, Workflow
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class Application:
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"""
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Streamlit application.
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"""
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def __init__(self):
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"""
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Creates a new Streamlit application.
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"""
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# Component options
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self.components = {}
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# Defined pipelines
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self.pipelines = {}
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+
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# Current workflow
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self.workflow = []
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# Embeddings index params
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self.embeddings = None
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self.documents = None
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self.data = None
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+
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def number(self, label):
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"""
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Extracts a number from a text input field.
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Args:
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label: label to use for text input field
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Returns:
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numeric input
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"""
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value = st.sidebar.text_input(label)
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return int(value) if value else None
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def split(self, text):
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"""
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Splits text on commas and returns a list.
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61 |
+
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Args:
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text: input text
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Returns:
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list
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"""
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return [x.strip() for x in text.split(",")]
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def options(self, component):
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"""
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+
Extracts component settings into a component configuration dict.
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+
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Args:
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+
component: component type
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+
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Returns:
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dict with component settings
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"""
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options = {"type": component}
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st.sidebar.markdown("---")
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if component == "embeddings":
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st.sidebar.markdown("**Embeddings Index** \n*Index workflow output*")
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options["path"] = st.sidebar.text_area("Embeddings model path", value="sentence-transformers/nli-mpnet-base-v2")
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options["upsert"] = st.sidebar.checkbox("Upsert")
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elif component == "summary":
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st.sidebar.markdown("**Summary** \n*Abstractive text summarization*")
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options["path"] = st.sidebar.text_input("Model", value="sshleifer/distilbart-cnn-12-6")
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options["minlength"] = self.number("Min length")
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options["maxlength"] = self.number("Max length")
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elif component in ("segment", "textract"):
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if component == "segment":
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st.sidebar.markdown("**Segment** \n*Split text into semantic units*")
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else:
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st.sidebar.markdown("**Textractor** \n*Extract text from documents*")
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options["sentences"] = st.sidebar.checkbox("Split sentences")
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options["lines"] = st.sidebar.checkbox("Split lines")
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options["paragraphs"] = st.sidebar.checkbox("Split paragraphs")
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options["join"] = st.sidebar.checkbox("Join tokenized")
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options["minlength"] = self.number("Min section length")
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elif component == "service":
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options["url"] = st.sidebar.text_input("URL")
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options["method"] = st.sidebar.selectbox("Method", ["get", "post"], index=0)
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options["params"] = st.sidebar.text_input("URL parameters")
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options["batch"] = st.sidebar.checkbox("Run as batch", value=True)
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options["extract"] = st.sidebar.text_input("Subsection(s) to extract")
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if options["params"]:
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options["params"] = {key: None for key in self.split(options["params"])}
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if options["extract"]:
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options["extract"] = self.split(options["extract"])
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elif component == "tabular":
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options["idcolumn"] = st.sidebar.text_input("Id columns")
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options["textcolumns"] = st.sidebar.text_input("Text columns")
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if options["textcolumns"]:
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options["textcolumns"] = self.split(options["textcolumns"])
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elif component == "transcribe":
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st.sidebar.markdown("**Transcribe** \n*Transcribe audio to text*")
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options["path"] = st.sidebar.text_input("Model", value="facebook/wav2vec2-base-960h")
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elif component == "translate":
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st.sidebar.markdown("**Translate** \n*Machine translation*")
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options["target"] = st.sidebar.text_input("Target language code", value="en")
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return options
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def build(self, components):
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"""
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Builds a workflow using components.
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Args:
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components: list of components to add to workflow
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"""
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# Clear application
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self.__init__()
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# pylint: disable=W0108
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tasks = []
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for component in components:
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component = dict(component)
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wtype = component.pop("type")
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self.components[wtype] = component
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if wtype == "embeddings":
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self.embeddings = Embeddings({**component})
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self.documents = Documents()
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tasks.append(Task(self.documents.add, unpack=False))
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elif wtype == "segment":
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self.pipelines[wtype] = Segmentation(**self.components["segment"])
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tasks.append(Task(self.pipelines["segment"]))
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elif wtype == "service":
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tasks.append(ServiceTask(**self.components["service"]))
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elif wtype == "summary":
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self.pipelines[wtype] = Summary(component.pop("path"))
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tasks.append(Task(lambda x: self.pipelines["summary"](x, **self.components["summary"])))
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elif wtype == "tabular":
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self.pipelines[wtype] = Tabular(**self.components["tabular"])
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tasks.append(Task(self.pipelines["tabular"]))
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+
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elif wtype == "textract":
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self.pipelines[wtype] = Textractor(**self.components["textract"])
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tasks.append(UrlTask(self.pipelines["textract"]))
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elif wtype == "transcribe":
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self.pipelines[wtype] = Transcription(component.pop("path"))
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tasks.append(UrlTask(self.pipelines["transcribe"], r".\.wav$"))
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elif wtype == "translate":
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self.pipelines[wtype] = Translation()
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tasks.append(Task(lambda x: self.pipelines["translate"](x, **self.components["translate"])))
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self.workflow = Workflow(tasks)
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def yaml(self, components):
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"""
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+
Builds a yaml string for components.
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Args:
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components: list of components to export to YAML
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Returns:
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YAML string
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"""
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# pylint: disable=W0108
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data = {}
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tasks = []
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name = None
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for component in components:
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component = dict(component)
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name = wtype = component.pop("type")
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if wtype == "summary":
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data["summary"] = {"path": component.pop("path")}
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tasks.append({"action": "summary"})
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elif wtype == "segment":
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data["segmentation"] = component
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tasks.append({"action": "segmentation"})
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+
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elif wtype == "service":
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config = dict(**component)
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config["task"] = "service"
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tasks.append(config)
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+
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elif wtype == "tabular":
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data["tabular"] = component
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tasks.append({"action": "tabular"})
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+
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elif wtype == "textract":
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data["textractor"] = component
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tasks.append({"action": "textractor", "task": "url"})
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+
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elif wtype == "transcribe":
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data["transcription"] = {"path": component.pop("path")}
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tasks.append({"action": "transcription", "task": "url"})
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+
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elif wtype == "translate":
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data["translation"] = {}
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tasks.append({"action": "translation", "args": list(component.values())})
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+
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elif wtype == "embeddings":
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index = component.pop("index")
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upsert = component.pop("upsert")
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+
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data["embeddings"] = component
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data["writable"] = True
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+
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if index:
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data["path"] = index
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+
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name = "index"
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tasks.append({"action": "upsert" if upsert else "index"})
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+
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# Add in workflow
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data["workflow"] = {name: {"tasks": tasks}}
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+
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return (name, yaml.dump(data))
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+
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def find(self, key):
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"""
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258 |
+
Lookup record from cached data by uid key.
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259 |
+
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260 |
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Args:
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key: uid to search for
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+
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Returns:
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text for matching uid
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"""
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+
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return [text for uid, text, _ in self.data if uid == key][0]
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+
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def process(self, data):
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"""
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+
Processes the current application action.
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+
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Args:
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data: input data
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+
"""
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+
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if data and self.workflow:
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# Build tuples for embedding index
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if self.documents:
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data = [(x, element, None) for x, element in enumerate(data)]
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+
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# Process workflow
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for result in self.workflow(data):
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if not self.documents:
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st.write(result)
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+
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# Build embeddings index
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if self.documents:
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# Cache data
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self.data = list(self.documents)
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+
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with st.spinner("Building embedding index...."):
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self.embeddings.index(self.documents)
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self.documents.close()
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+
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# Clear workflow
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+
self.documents, self.pipelines, self.workflow = None, None, None
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+
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+
if self.embeddings and self.data:
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# Set query and limit
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query = st.text_input("Query")
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+
limit = min(5, len(self.data))
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303 |
+
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st.markdown(
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+
"""
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306 |
+
<style>
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307 |
+
table td:nth-child(1) {
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308 |
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display: none
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309 |
+
}
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310 |
+
table th:nth-child(1) {
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311 |
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display: none
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312 |
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}
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313 |
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table {text-align: left !important}
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314 |
+
</style>
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315 |
+
""",
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+
unsafe_allow_html=True,
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+
)
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318 |
+
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+
if query:
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320 |
+
df = pd.DataFrame([{"content": self.find(uid), "score": score} for uid, score in self.embeddings.search(query, limit)])
|
321 |
+
st.table(df)
|
322 |
+
|
323 |
+
def parse(self, data):
|
324 |
+
"""
|
325 |
+
Parse input data, splits on new lines depending on type of tasks and format of input.
|
326 |
+
|
327 |
+
Args:
|
328 |
+
data: input data
|
329 |
+
|
330 |
+
Returns:
|
331 |
+
parsed data
|
332 |
+
"""
|
333 |
+
|
334 |
+
if re.match(r"^(http|https|file):\/\/", data) or (self.workflow and isinstance(self.workflow.tasks[0], ServiceTask)):
|
335 |
+
return [x for x in data.split("\n") if x]
|
336 |
+
|
337 |
+
return [data]
|
338 |
+
|
339 |
+
def run(self):
|
340 |
+
"""
|
341 |
+
Runs Streamlit application.
|
342 |
+
"""
|
343 |
+
|
344 |
+
st.sidebar.image("https://github.com/neuml/txtai/raw/master/logo.png", width=256)
|
345 |
+
st.sidebar.markdown("# Workflow builder \n*Build and apply workflows to data* ")
|
346 |
+
|
347 |
+
# Get selected components
|
348 |
+
components = ["embeddings", "segment", "service", "summary", "tabular", "textract", "transcribe", "translate"]
|
349 |
+
selected = st.sidebar.multiselect("Select components", components)
|
350 |
+
|
351 |
+
# Get selected options
|
352 |
+
components = [self.options(component) for component in selected]
|
353 |
+
st.sidebar.markdown("---")
|
354 |
+
|
355 |
+
with st.sidebar:
|
356 |
+
col1, col2 = st.columns(2)
|
357 |
+
|
358 |
+
# Build or re-build workflow when build button clicked
|
359 |
+
build = col1.button("Build", help="Build the workflow and run within this application")
|
360 |
+
if build:
|
361 |
+
with st.spinner("Building workflow...."):
|
362 |
+
self.build(components)
|
363 |
+
|
364 |
+
# Generate API configuration
|
365 |
+
_, config = self.yaml(components)
|
366 |
+
|
367 |
+
col2.download_button("Export", config, file_name="workflow.yml", mime="text/yaml", help="Export the API workflow as YAML")
|
368 |
+
|
369 |
+
with st.expander("Data", expanded=not self.data):
|
370 |
+
data = st.text_area("Input", height=10)
|
371 |
+
|
372 |
+
# Parse text items
|
373 |
+
data = self.parse(data)
|
374 |
+
|
375 |
+
# Process current action
|
376 |
+
self.process(data)
|
377 |
+
|
378 |
+
|
379 |
+
@st.cache(allow_output_mutation=True)
|
380 |
+
def create():
|
381 |
+
"""
|
382 |
+
Creates and caches a Streamlit application.
|
383 |
+
|
384 |
+
Returns:
|
385 |
+
Application
|
386 |
+
"""
|
387 |
+
|
388 |
+
return Application()
|
389 |
+
|
390 |
+
|
391 |
+
if __name__ == "__main__":
|
392 |
+
os.environ["TOKENIZERS_PARALLELISM"] = "false"
|
393 |
+
|
394 |
+
# Create and run application
|
395 |
+
app = create()
|
396 |
+
app.run()
|