Prerelease 1.31.0 - Embedded app management (#946)

* Update page_link example source

* Add chat_input inline example

* Add write_stream example source

* Ignore secrets

* Correct file names

* Add custom navigation example

* Ignore all __pycache__

* Switch to nightly

* Add check for None in custom navigation example

Author: sfc-gh-dmatthews

.gitignore

@@ -60,7 +60,7 @@ typings/
 .rts2_cache_umd/
 
 # Python cache
-python/__pycache__/
+__pycache__
 
 # Optional REPL history
 .node_repl_history
@@ -112,4 +112,5 @@ node_modules/
 .DS_Store
 out/
 public/pdf/pages/
-.idea/
+.idea/
+python/api-examples-source/.streamlit/secrets.toml

python/api-examples-source/chat.input-inline.py

@@ -0,0 +1,6 @@
+import streamlit as st
+
+with st.sidebar:
+    prompt = st.chat_input("Say something")
+if prompt:
+    st.write(f"User has sent the following prompt: {prompt}")

python/api-examples-source/layout.container4.py

@@ -0,0 +1,6 @@
+import streamlit as st
+
+long_text = "Lorem ipsum. " * 1000
+
+with st.container(height=300):
+    st.markdown(long_text)

python/api-examples-source/requirements.txt

@@ -10,4 +10,4 @@ altair==4.2.0
 pydeck==0.8.0
 Faker==19.1.0
 openai==1.3.0
-streamlit==1.30.0
+streamlit-nightly

python/api-examples-source/text.write_stream.py

@@ -0,0 +1,32 @@
+import time
+import numpy as np
+import pandas as pd
+import streamlit as st
+
+_LOREM_IPSUM = """
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
+incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
+nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
+"""
+
+
+def stream_data():
+    for word in _LOREM_IPSUM.split():
+        yield word + " "
+        time.sleep(0.02)
+
+    yield pd.DataFrame(
+        np.random.randn(5, 10),
+        columns=["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"],
+    )
+
+    for word in _LOREM_IPSUM.split():
+        yield word + " "
+        time.sleep(0.02)
+
+
+if st.button("Stream data"):
+    st.write_stream(stream_data)
+    st.title("Hi inside the button")
+
+st.title("Hi outside the button")

python/api-examples-source/tutorials/custom-navigation/.streamlit/config.toml

@@ -0,0 +1,2 @@
+[client]
+showSidebarNavigation = false

python/api-examples-source/tutorials/custom-navigation/app.py

@@ -0,0 +1,20 @@
+import streamlit as st
+from menu import menu
+
+if "role" in st.session_state:
+    st.session_state._role = st.session_state.role
+else:
+    st.session_state.role = None
+
+
+def set_role():
+    st.session_state.role = st.session_state._role
+
+
+st.selectbox(
+    "Select your role:",
+    [None, "user", "admin", "super-admin"],
+    key="_role",
+    on_change=set_role,
+)
+menu()

python/api-examples-source/tutorials/custom-navigation/menu.py

@@ -0,0 +1,24 @@
+import streamlit as st
+
+
+def logged_in():
+    st.sidebar.page_link("app.py", label="Switch accounts")
+    st.sidebar.page_link("pages/user.py", label="Your profile")
+    if st.session_state.role in ["admin", "super-admin"]:
+        st.sidebar.page_link("pages/admin.py", label="Manage users")
+        st.sidebar.page_link(
+            "pages/super-admin.py",
+            label="Manage admin access",
+            disabled=st.session_state.role != "super-admin",
+        )
+
+
+def not_logged_in():
+    st.sidebar.page_link("app.py", label="Log in")
+
+
+def menu():
+    if "role" not in st.session_state or st.session_state.role is None:
+        not_logged_in()
+        return
+    logged_in()

python/api-examples-source/tutorials/custom-navigation/pages/admin.py

@@ -0,0 +1,14 @@
+import streamlit as st
+from menu import menu
+
+if "role" not in st.session_state or st.session_state.role is None:
+    st.switch_page("app.py")
+menu()
+
+if st.session_state.role not in ["admin", "super-admin"]:
+    st.warning("You do not have permission to view this page.")
+    st.stop()
+
+st.title("This page is available to all admins")
+
+st.markdown(f"You are currently logged with the role of {st.session_state.role}.")

python/api-examples-source/tutorials/custom-navigation/pages/super-admin.py

@@ -0,0 +1,13 @@
+import streamlit as st
+from menu import menu
+
+if "role" not in st.session_state or st.session_state.role is None:
+    st.switch_page("app.py")
+menu()
+
+if st.session_state.role not in ["super-admin"]:
+    st.warning("You do not have permission to view this page.")
+    st.stop()
+
+st.title("This page is available to super-admins")
+st.markdown(f"You are currently logged with the role of {st.session_state.role}.")

python/api-examples-source/tutorials/custom-navigation/pages/user.py

@@ -0,0 +1,9 @@
+import streamlit as st
+from menu import menu
+
+if "role" not in st.session_state or st.session_state.role is None:
+    st.switch_page("app.py")
+menu()
+
+st.title("This page is available to all users")
+st.markdown(f"You are currently logged with the role of {st.session_state.role}.")

python/api-examples-source/tutorials/requirements.txt

@@ -1 +1 @@
-streamlit==1.30.0
+streamlit-nightly

python/api-examples-source/widgets.page_link/pages/page_1.py python/api-examples-source/widget.page_link/pages/page_1.py

@@ -2,5 +2,5 @@
 
 st.page_link("your_app.py", label="Home", icon="🏠")
 st.page_link("pages/page_1.py", label="Page 1", icon="1️⃣")
-st.page_link("pages/page_2.py", label="Page 2", icon="2️⃣")
+st.page_link("pages/page_2.py", label="Page 2", icon="2️⃣", disabled=True)
 st.page_link("http://www.google.com", label="Google", icon="🌎")

python/api-examples-source/widgets.page_link/pages/page_2.py python/api-examples-source/widget.page_link/pages/page_2.py

@@ -2,5 +2,5 @@
 
 st.page_link("your_app.py", label="Home", icon="🏠")
 st.page_link("pages/page_1.py", label="Page 1", icon="1️⃣")
-st.page_link("pages/page_2.py", label="Page 2", icon="2️⃣")
+st.page_link("pages/page_2.py", label="Page 2", icon="2️⃣", disabled=True)
 st.page_link("http://www.google.com", label="Google", icon="🌎")

python/api-examples-source/widgets.page_link/requirements.txt python/api-examples-source/widget.page_link/requirements.txt

@@ -2,5 +2,5 @@
 
 st.page_link("your_app.py", label="Home", icon="🏠")
 st.page_link("pages/page_1.py", label="Page 1", icon="1️⃣")
-st.page_link("pages/page_2.py", label="Page 2", icon="2️⃣")
+st.page_link("pages/page_2.py", label="Page 2", icon="2️⃣", disabled=True)
 st.page_link("http://www.google.com", label="Google", icon="🌎")