Create app.py

app.py

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+
+import streamlit as st
+import pysrt
+import io
+import re
+
+# Bold specified language chunks in a given subtitle line
+def bold_chunks_in_text(text, chunks):
+    for phrase in chunks:
+        # Use case-insensitive and exact matching
+        pattern = re.compile(re.escape(phrase), re.IGNORECASE)
+        text = pattern.sub(lambda m: f"<b>{m.group(0)}</b>", text)
+    return text
+
+# Main processing function
+def process_subtitles(srt_content, german_lines, bold_chunks):
+    subs = pysrt.from_string(srt_content.decode('utf-8'))
+    
+    if len(subs) != len(german_lines):
+        st.error(f"Line mismatch: {len(subs)} subtitle entries vs {len(german_lines)} German lines.")
+        return None
+
+    for i, sub in enumerate(subs):
+        original = sub.text.strip()
+        german = german_lines[i].strip()
+
+        original_bold = bold_chunks_in_text(original, bold_chunks)
+        german_bold = bold_chunks_in_text(german, bold_chunks)
+
+        sub.text = f"{original_bold}\n{german_bold}"
+
+    output = io.StringIO()
+    subs.write_into(output)
+    return output.getvalue()
+
+# ---------- Streamlit UI ----------
+st.set_page_config(page_title="Subtitle Formatter", layout="centered")
+st.title("🎬 Bilingual Subtitle Formatter for Language Learning")
+
+st.markdown("Upload a `.srt` file, paste German translations, and highlight key phrases.")
+
+uploaded_srt = st.file_uploader("📄 Upload Original Subtitle (.srt)", type=["srt"])
+german_input = st.text_area("🇩🇪 German Translations (1 per subtitle line)", height=200)
+chunks_input = st.text_input("🔍 Highlight Phrases (comma-separated)", placeholder="comment ça va, wie geht es dir")
+
+if st.button("✨ Format Subtitles"):
+    if not uploaded_srt or not german_input:
+        st.warning("Please upload a subtitle file and enter German translations.")
+    else:
+        german_lines = [line.strip() for line in german_input.strip().splitlines()]
+        bold_chunks = [chunk.strip() for chunk in chunks_input.split(",") if chunk.strip()]
+
+        result_srt = process_subtitles(uploaded_srt.read(), german_lines, bold_chunks)
+        
+        if result_srt:
+            st.success("✅ Subtitle processing complete!")
+            st.download_button("📥 Download Formatted Subtitle", result_srt, "formatted_bilingual.srt", "text/plain")