Update app.py

app.py

@@ -0,0 +1,61 @@
+# app.py
+import streamlit as st
+from Bio import pairwise2
+from Bio.pairwise2 import format_alignment
+
+# Page Configuration
+st.set_page_config(
+    page_title="🧬 DNA Sequence Matcher",
+    page_icon="🧬",
+    layout="centered"
+)
+
+# Header
+st.markdown(
+    "<h1 style='text-align: center; color: #4CAF50;'>🧬 DNA Sequence Matcher</h1>",
+    unsafe_allow_html=True
+)
+st.markdown(
+    "<p style='text-align: center; color: #555;'>Align and compare two DNA sequences using Biopython</p>",
+    unsafe_allow_html=True
+)
+
+# User Input for DNA Sequences
+st.subheader("🔬 Input DNA Sequences")
+seq1 = st.text_area("Enter DNA Sequence 1:", placeholder="e.g., ATCGTACGTA")
+seq2 = st.text_area("Enter DNA Sequence 2:", placeholder="e.g., ATCGTAGCTA")
+
+# Alignment Parameters
+st.subheader("⚙️ Alignment Parameters")
+match_score = st.slider("Match Score", min_value=1, max_value=5, value=2)
+mismatch_penalty = st.slider("Mismatch Penalty", min_value=-5, max_value=0, value=-1)
+gap_open_penalty = st.slider("Gap Open Penalty", min_value=-5, max_value=0, value=-2)
+gap_extend_penalty = st.slider("Gap Extend Penalty", min_value=-5, max_value=0, value=-0.5)
+
+# Perform Alignment
+if st.button("🧪 Align Sequences"):
+    if not seq1 or not seq2:
+        st.warning("⚠️ Please enter both DNA sequences.")
+    else:
+        alignments = pairwise2.align.globalms(
+            seq1,
+            seq2,
+            match_score,
+            mismatch_penalty,
+            gap_open_penalty,
+            gap_extend_penalty
+        )
+
+        # Display Results
+        st.subheader("🔍 Alignment Results")
+        if alignments:
+            for alignment in alignments[:1]:  # Show only the top alignment
+                st.code(format_alignment(*alignment))
+        else:
+            st.error("❌ No alignment could be found.")
+
+# Footer
+st.markdown(
+    "<hr><p style='text-align: center;'>💻 <b>Developed by ChatGPT</b></p>",
+    unsafe_allow_html=True
+)