Update app.py

app.py

@@ -859,34 +859,47 @@ def run_step2_structure(model, processor, metadata: dict, device,
     thread.start()
 
     # Pre-build Python-verified sections
-    python_sections = f"""## 🖼️ Visual Elements
-    | Element | Status | Location |
-    |---------|--------|----------|
-    | 📷 Profile Photo | {metadata['photo_present']} | {metadata['photo_location']} |
-    | ✍️ Signature | {metadata['sig_present']} | {metadata['sig_location']} |
-    | 🔐 MRZ Zone | {metadata['mrz_present']} | Bottom strip |
+    # ── Pre-compute outside f-string (backslash fix for Python < 3.12) ──
+    newline = "\n"
+    mrz_pattern = r'^[A-Z0-9<]{25,50}$'
+    ws_pattern  = r'\s+'
+
+    mrz_raw_lines = []
+    for _l in raw_text.split("\n"):
+        _c = re.sub(ws_pattern, '', _l.strip())
+        if re.match(mrz_pattern, _c):
+            mrz_raw_lines.append(_c)
+    mrz_raw_display = newline.join(mrz_raw_lines) if mrz_raw_lines else "NOT PRESENT"
+    mrz_table_str   = build_mrz_table(mrz_data) if mrz_data else "_No MRZ detected._"
 
-    ---
-
-    ## ✅ English Fields (Direct from Card — Not Modified)
-    {cal_note}
-
-    {tbl}
-
-    ---
-
-    ## 📜 Original Script
-
-    {raw_text}
-    ---
-
-    ## 🔐 MRZ Data
+    # Pre-build Python-verified sections
+    python_sections = (
+        "## 🖼️ Visual Elements\n\n"
+        "| Element | Status | Location |\n"
+        "|---------|--------|----------|\n"
+        f"| 📷 Profile Photo | {metadata['photo_present']} | {metadata['photo_location']} |\n"
+        f"| ✍️ Signature | {metadata['sig_present']} | {metadata['sig_location']} |\n"
+        f"| 🔐 MRZ Zone | {metadata['mrz_present']} | Bottom strip |\n\n"
+        "---\n\n"
+        "## ✅ English Fields (Direct from Card — Not Modified)\n"
+        f"{cal_note}\n\n"
+        f"{tbl}\n\n"
+        "---\n\n"
+        "## 📜 Original Script\n\n"
+        "```\n"
+        f"{raw_text}\n"
+        "```\n\n"
+        "---\n\n"
+        "## 🔐 MRZ Data\n\n"
+        "```\n"
+        f"{mrz_raw_display}\n"
+        "```\n\n"
+        f"{mrz_table_str}\n\n"
+        "---\n\n"
+    )
 
-    {chr(10).join([l for l in raw_text.split(chr(10)) if re.match(r'^[A-Z0-9<]{25,50}$', re.sub(r'\s+','',l.strip()))]) or 'NOT PRESENT'}
-    {build_mrz_table(mrz_data) if mrz_data else '_No MRZ detected._'}
+    return streamer, thread, mrz_data, python_sections
 
-    ---
-    """
     
     return streamer, thread, mrz_data, python_sections