Create new file

appStore/multiapp.py

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+"""Frameworks for running multiple Streamlit applications as a single app.
+"""
+import streamlit as st
+from PIL import Image
+
+class MultiApp:
+    """Framework for combining multiple streamlit applications.
+    Usage:
+        def foo():
+            st.title("Hello Foo")
+        def bar():
+            st.title("Hello Bar")
+        app = MultiApp()
+        app.add_app("Foo", foo)
+        app.add_app("Bar", bar)
+        app.run()
+    It is also possible keep each application in a separate file.
+        import foo
+        import bar
+        app = MultiApp()
+        app.add_app("Foo", foo.app)
+        app.add_app("Bar", bar.app)
+        app.run()
+    """
+    def __init__(self):
+        self.apps = []
+
+    def add_app(self, title, func):
+        """Adds a new application.
+        Parameters
+        ----------
+        func:
+            the python function to render this app.
+        title:
+            title of the app. Appears in the dropdown in the sidebar.
+        """
+        self.apps.append({
+            "title": title,
+            "function": func
+        })
+
+    def run(self):
+        st.sidebar.write(format_func=lambda app: app['title'])
+        image = Image.open('appStore/img/giz_sdsn.jpg')
+        st.sidebar.image(image)
+        app = st.sidebar.radio(
+            'Go To',
+            self.apps,
+            format_func=lambda app: app['title'])
+
+        app['function']()