First Viz

app.py

@@ -19,3 +19,19 @@ viz1 = (
 )
 
 st.altair_chart(viz1, use_container_width=False)
+
+st.header("Visualization 2: Issued Time")
+data["Issue Date"] = pd.to_datetime(data["Issue Date"],errors="coerce")
+data["YearMonth"] = data["Issue Date"].dt.to_period("M")
+
+viz2 = (
+    alt.Chart(data)
+    .mark_line(point=True)
+    .encode(
+        x=alt.X("YearMonth:T", title = "Issue Date(Month)"),
+        y = alt.Y("count():Q", title="Number of License"),
+        color = alt.Color("License Type:N", legend=True)
+    )
+    .properties(width = 900, height=500)
+)
+st.altair_chart(viz2, use_container_width=False)