adding export-import session

view/streamlit_app.py

@@ -5,6 +5,24 @@
 from autofit import autofit
 from helpers import simulate_pimm, simulate_vsd
 from utils import GENERIC_BOUNDS, GENERIC_UNITS
+import json
+
+
+def export_session_state():
+    export_dict = {}
+    opts = ["_btn", "_file", "_state", "low_", "up_", "check_", "upload"]
+    for k, v in st.session_state.items():
+        skip = any(forb_opts in k for forb_opts in opts)
+        if not skip:
+            export_dict[k] = v
+
+    return json.dumps(export_dict)
+
+
+def import_session_state(file):
+    for k, v in json.load(file).items():
+        st.session_state[k] = v
+
 
 with st.expander("# Read me"):
     st.write(
@@ -17,13 +35,32 @@
     )
 
 with st.sidebar:
-    st.file_uploader(
-        "Upload your data here",
-        help="Upload your data here. Must be `\t` separated values and have H and f headers.",
-        type=["txt", "dat"],
-        accept_multiple_files=False,
-        key="upload",
-    )
+    with st.expander("Export/Import"):
+        st.download_button(
+            label="Export session state",
+            data=export_session_state(),
+            file_name="session_state.json",
+            mime="application/json",
+            type="primary",
+        )
+
+        st.file_uploader(
+            "Upload session state",
+            help="Upload your data here. Must be `\t` separated values and have H and f headers.",
+            type=["json"],
+            accept_multiple_files=False,
+            key="import_file",
+        )
+        if st.session_state.import_file:
+            import_session_state(st.session_state.import_file)
+
+        st.file_uploader(
+            "Upload your data here",
+            help="Upload your data here. Must be `\t` separated values and have H and f headers.",
+            type=["txt", "dat"],
+            accept_multiple_files=False,
+            key="upload",
+        )
     N = st.number_input(
         "Number of layers", min_value=1, max_value=10, value=1, key="N", format="%d"
     )
@@ -149,7 +186,6 @@
             help="Maximum frequency (cutoff) visible in plot",
         )
 
-
 pimm_tab, vsd_tab, opt_tab = st.tabs(["PIMM", "VSD", "Optimization"])
 with opt_tab:
     with st.expander("Optimization parameters"):