Create app.py

app.py

@@ -0,0 +1,88 @@
+import streamlit as st
+from diff_match_patch import diff_match_patch
+import re
+
+def main():
+    st.set_page_config(page_title="Prompt Comparison Tool", layout="wide")
+    st.title("Prompt Comparison Tool")
+
+    # Initialize session state
+    if 'old_text' not in st.session_state:
+        st.session_state.old_text = ""
+    if 'new_text' not in st.session_state:
+        st.session_state.new_text = ""
+    if 'diff_html' not in st.session_state:
+        st.session_state.diff_html = ""
+
+    # Create two columns for text areas
+    col1, col2 = st.columns(2)
+
+    with col1:
+        st.session_state.old_text = st.text_area(
+            "Old Prompt:",
+            height=300,
+            value=st.session_state.old_text,
+            placeholder="Enter original text..."
+        )
+
+    with col2:
+        st.session_state.new_text = st.text_area(
+            "New Prompt:",
+            height=300,
+            value=st.session_state.new_text,
+            placeholder="Enter modified text..."
+        )
+
+    # Button controls
+    col_compare, col_clear, col_copy = st.columns([1, 1, 1])
+    
+    with col_compare:
+        if st.button("Compare"):
+            dmp = diff_match_patch()
+            diffs = dmp.diff_main(st.session_state.old_text, st.session_state.new_text)
+            dmp.diff_cleanupSemantic(diffs)
+
+            html = []
+            for op, text in diffs:
+                text = text.replace("\n", "<br>")  # Preserve newlines in HTML
+                if op == 1:  # Insertion
+                    html.append(f'<span style="background-color: #c8e6c9; border-radius: 4px; padding: 2px 4px;">{text}</span>')
+                elif op == -1:  # Deletion
+                    html.append(f'<span style="background-color: #ffcdd2; text-decoration: line-through; border-radius: 4px; padding: 2px 4px;">{text}</span>')
+                else:  # No change
+                    html.append(text)
+            
+            st.session_state.diff_html = "".join(html)
+
+    with col_clear:
+        if st.button("Clear"):
+            st.session_state.old_text = ""
+            st.session_state.new_text = ""
+            st.session_state.diff_html = ""
+            st.rerun()
+
+    # Display comparison results
+    if st.session_state.diff_html:
+        st.markdown("### Comparison Result:")
+        st.markdown(st.session_state.diff_html, unsafe_allow_html=True)
+
+    # Copy functionality
+    with col_copy:
+        if st.button("Copy Result"):
+            if st.session_state.diff_html:
+                # Remove HTML tags and convert <br> to newlines
+                clean_text = re.sub(r'<br>', '\n', st.session_state.diff_html)
+                clean_text = re.sub(r'<[^>]+>', '', clean_text)
+                
+                try:
+                    import pyperclip
+                    pyperclip.copy(clean_text)
+                    st.success("Result copied to clipboard!")
+                except:
+                    st.error("Clipboard access requires extra permissions. Please copy manually:")
+                    st.code(clean_text)
+            else:
+                st.warning("No comparison result to copy")
+
+if __name__ == "__main__":
+    main()