generalistcodes · September 21, 2020 23:15 · Oct 27, 2019 · Oct 27, 2019 · Oct 27, 2019 · Oct 27, 2019
diff --git a/button_instructions.md → button_example.md b/button_instructions.md → button_example.md
diff --git a/README.md → button_instructions.md b/README.md → button_instructions.md
diff --git a/README.md b/README.md
@@ -0,0 +1,18 @@
+Example for discussion: https://discuss.streamlit.io/t/how-to-evolve-complex-state-e-g-annotate-data/
+
+Install the requirements.
+```
+fastapi==0.42.0
+streamlit==0.49.0
+uvicorn==0.9.1
+```
+
+Run the server.
+```
+uvicorn server:app --reload
+```
+
+Run Streamlit.
+```
+streamlit run letters.py
+```
diff --git a/letters.py b/letters.py
@@ -0,0 +1,19 @@
+import streamlit as st
+import requests
+
+st.subheader('existing letters')
+letters = requests.get('http://127.0.0.1:8000/letters').json()
+for letter in letters:
+    st.write(letter)
+
+st.subheader('add new letters')
+new_candidates = []
+for new_letter in ['d', 'e', 'f']:
+    st.write(f'add {new_letter}')
+    add_letter = st.checkbox(f'add {new_letter}')
+    if add_letter:
+        new_candidates.append(new_letter)
+
+submit = st.button('submit new letters')
+if submit:
+    requests.post('http://127.0.0.1:8000/letters', json=new_candidates)
diff --git a/server.py b/server.py
@@ -0,0 +1,17 @@
+from fastapi import FastAPI
+from typing import List
+
+app = FastAPI()
+
+LETTERS = []
+
+
+@app.get("/letters")
+def list_letters():
+    return LETTERS
+
+
+@app.post("/letters")
+def add_letters(letters: List[str]):
+    LETTERS.extend(letters)
+    return {'added': len(letters)}
No results found