Fix: convert amounts to numeric before formatting (handles string + native)

app.py

@@ -1,13 +1,5 @@
 """
 VynFi Streamlit Template — Generate, Explore, Visualize
-
-A ready-to-deploy Streamlit app that connects to the VynFi API,
-generates synthetic financial data, and renders interactive dashboards.
-Clone and customize for your use case.
-
-Usage:
-    export VYNFI_API_KEY=vf_live_...
-    streamlit run app.py
 """
 
 import os
@@ -29,8 +21,6 @@ if not api_key:
 
 client = vynfi.VynFi(api_key=api_key)
 
-# ── Sidebar: generation config ──────────────────────────────────────────────
-
 st.sidebar.header("Generate")
 
 sector = st.sidebar.selectbox(
@@ -42,7 +32,6 @@ rows = st.sidebar.slider("Rows", min_value=100, max_value=100_000, value=1000, s
 companies = st.sidebar.slider("Companies", min_value=1, max_value=20, value=3)
 fraud_rate = st.sidebar.slider("Fraud rate", min_value=0.0, max_value=0.20, value=0.03, step=0.01)
 
-# NL config option
 st.sidebar.divider()
 nl_description = st.sidebar.text_area(
     "Or describe what you want (Scale+)",
@@ -52,8 +41,6 @@ nl_description = st.sidebar.text_area(
 
 generate = st.sidebar.button("Generate", type="primary", use_container_width=True)
 
-# ── Main area ────────────────────────────────────────────────────────────────
-
 if generate:
     with st.spinner("Generating..."):
         try:
@@ -87,8 +74,6 @@ if generate:
         except Exception as e:
             st.error(f"Error: {e}")
 
-# ── Display results ──────────────────────────────────────────────────────────
-
 if "archive" in st.session_state:
     archive = st.session_state["archive"]
 
@@ -98,9 +83,8 @@ if "archive" in st.session_state:
         st.subheader("Journal Entries")
         try:
             entries = archive.json("journal_entries.json")
-            # Flatten
             rows_flat = []
-            for entry in entries[:500]:  # Cap for display
+            for entry in entries[:500]:
                 header = entry.get("header", entry)
                 lines = entry.get("lines", [entry])
                 for line in lines:
@@ -115,14 +99,20 @@ if "archive" in st.session_state:
                         "credit_amount": line.get("credit_amount", 0),
                     })
             df = pd.DataFrame(rows_flat)
+
+            # Convert amounts to numeric (handles both string and native)
+            for col in ["debit_amount", "credit_amount"]:
+                df[col] = pd.to_numeric(df[col], errors="coerce").fillna(0)
+
             st.metric("Line items", f"{len(df):,}")
 
             col1, col2 = st.columns(2)
             with col1:
                 st.metric("Total debits", f"${df['debit_amount'].sum():,.2f}")
             with col2:
-                fraud_count = df["is_fraud"].sum()
-                st.metric("Fraud entries", f"{fraud_count} ({fraud_count/len(df)*100:.1f}%)")
+                fraud_count = int(df["is_fraud"].sum())
+                pct = fraud_count / len(df) * 100 if len(df) > 0 else 0
+                st.metric("Fraud entries", f"{fraud_count} ({pct:.1f}%)")
 
             st.dataframe(df, use_container_width=True, hide_index=True)
         except Exception as e: