Add app to fit PySR model

gui/app.py

@@ -0,0 +1,29 @@
+import streamlit as st
+import numpy as np
+import pandas as pd
+
+st.title("Interactive PySR")
+file_name = st.file_uploader(
+    "Upload a data file, with your output column labeled 'y'", type=["csv"]
+)
+
+if file_name is not None:
+    col1, col2 = st.columns(2)
+
+    df = pd.read_csv(file_name)
+    y = np.array(df["y"])
+    X = df.drop(["y"], axis=1)
+    import pysr
+
+    pysr.install()
+    from pysr import PySRRegressor
+
+    model = PySRRegressor()
+    model.fit(X, y)
+
+    col1.header("Equation")
+    col2.header("Loss")
+    # model.equations_ is a pd.DataFrame
+    for i, row in model.equations_.iterrows():
+        col1.subheader(row["equation"])
+        col2.subheader(row["loss"])