Trying Streamlit app

app.py

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+import streamlit as st
+import datetime
+from math import ceil
+
+date_str=st.text_area("Enter a date (format: yyyy-mm-dd): ")
+
+# Convert the input string to a datetime object
+date = datetime.datetime.strptime(date_str, "%Y-%m-%d")
+
+# Calculate the dates 500, 1000, 1500, 2000, and 2500 days after the input date
+dates_after = []
+cutoff=(today - date.date()).days+2001
+day_list=list(range(500,2501,500))+list(range(3000,cutoff,1000))
+for days in day_list:
+    delta = datetime.timedelta(days=days)
+    dates_after.append(date + delta)
+    
+# Calculate the next multiple of 500 days after the current date
+delta_days = 500*(ceil((today - date.date()).days/500))
+next_multiple = date + datetime.timedelta(days=delta_days)
+
+# Print the results
+print("Input date:", date.strftime("%Y-%m-%d"))
+print("Next multiple of 500:", delta_days, "days on", next_multiple.strftime("%Y-%m-%d"),"\n")
+for i, date_after in enumerate(dates_after):
+    print(f"{day_list[i]} days after input date:", date_after.strftime("%Y-%m-%d"))