import streamlit as st

# Set up the main layout of the app
st.title("String Methods in Python")

st.write("""
### Explore various Python string methods interactively!
Enter a string below, and choose the string method you want to apply.
""")

# User input: Input string
user_input = st.text_input("Enter a string:", "Yes iam Batman!")

# User input: Choose a string method
option = st.selectbox(
    "Which string method do you want to apply?",
    ("upper", "lower", "capitalize", "title", "swapcase", "find", "replace", "split", "strip", "count")
)
# Apply string method based on user selection
if option == "upper":
    st.write(f"Result: {user_input.upper()}")
elif option == "lower":
    st.write(f"Result: {user_input.lower()}")
elif option == "capitalize":
    st.write(f"Result: {user_input.capitalize()}")
elif option == "title":
    st.write(f"Result: {user_input.title()}")
elif option == "swapcase":
    st.write(f"Result: {user_input.swapcase()}")
elif option == "find":
    sub_str = st.text_input("Enter substring to find:")
    if sub_str:
        st.write(f"Position of '{sub_str}': {user_input.find(sub_str)}")
elif option == "replace":
    old = st.text_input("Substring to replace:")
    new = st.text_input("Replacement substring:")
    if old and new:
        st.write(f"Result: {user_input.replace(old, new)}")
elif option == "split":
    delimiter = st.text_input("Enter delimiter (leave empty for spaces):", "")
    st.write(f"Result: {user_input.split(delimiter)}")
elif option == "strip":
    st.write(f"Result: {user_input.strip()}")
elif option == "count":
    sub_str = st.text_input("Enter substring to count:")
    if sub_str:
        st.write(f"Count of '{sub_str}': {user_input.count(sub_str)}")