统一使用start.sh启动

两个demo页面

pages/test2_input-output.py

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+import random
+
+import streamlit as st
+import pandas as pd
+import numpy as np
+
+if "counter" not in st.session_state:
+    st.session_state.counter = 0
+
+st.session_state.counter += 1
+
+st.header(f"This page has run {st.session_state.counter} times.")
+st.button("Run it again")
+
+if "df" not in st.session_state:
+    st.session_state.df = pd.DataFrame(np.random.randn(20, 2), columns=["x", "y"])
+if "color" not in st.session_state:
+    st.session_state.color = "#FF0000"
+
+
+def generate_random_color():
+    rand_color = "#{:06x}".format(random.randint(0, 0xFFFFFF))
+    st.session_state.color = rand_color.upper()
+
+
+st.header("Choose a datapoint color")
+st.color_picker("Color", "#FF0000", key="color")
+st.button("random color", key="random_color", on_click=generate_random_color)
+st.divider()
+
+st.scatter_chart(st.session_state.df, x="x", y="y", color=st.session_state.color)