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| import streamlit as st | |
| def add(a, b): | |
| if not isinstance(a, (int, float)) or not isinstance(b, (int, float)): | |
| return "Invalid input: Please enter only numbers." | |
| return a + b | |
| def subtract(a, b): | |
| if not isinstance(a, (int, float)) or not isinstance(b, (int, float)): | |
| return "Invalid input: Please enter only numbers." | |
| return a - b | |
| def multiply(a, b): | |
| if not isinstance(a, (int, float)) or not isinstance(b, (int, float)): | |
| return "Invalid input: Please enter only numbers." | |
| return a * b | |
| def divide(a, b): | |
| if not isinstance(a, (int, float)) or not isinstance(b, (int, float)): | |
| return "Invalid input: Please enter only numbers." | |
| if b == 0: | |
| return "Error: Division by zero" | |
| return a / b | |
| def exponentiation(a, b): | |
| if not isinstance(a, (int, float)) or not isinstance(b, (int, float)): | |
| return "Invalid input: Please enter only numbers." | |
| return a ** b | |
| def square_root(a): | |
| if not isinstance(a, (int, float)): | |
| return "Invalid input: Please enter only numbers." | |
| if a < 0: | |
| return "Error: Square root of negative number not possible." | |
| return a ** 0.5 | |
| st.title("Advanced Functional Calculator") | |
| # Clear layout using columns | |
| col1, col2 = st.columns(2) | |
| # Input fields | |
| first_number = col1.number_input("Enter first number", key="first_number") | |
| second_number = col2.number_input("Enter second number (optional)", key="second_number") | |
| # Buttons with descriptions | |
| add_button = st.button("Add", key="add_button") | |
| subtract_button = st.button("Subtract", key="subtract_button") | |
| multiply_button = st.button("Multiply", key="multiply_button") | |
| divide_button = st.button("Divide", key="divide_button") | |
| exp_button = st.button("Exponentiation", key="exp_button") | |
| sqrt_button = st.button("Square Root", key="sqrt_button") | |
| # Robust input validation and calculation based on buttons | |
| if add_button: | |
| result = add(first_number, second_number) | |
| if isinstance(result, str): # Display error message if validation failed | |
| st.error(result) | |
| else: | |
| st.write("Result:", result) | |
| elif subtract_button: | |
| result = subtract(first_number, second_number) | |
| if isinstance(result, str): | |
| st.error(result) | |
| else: | |
| st.write("Result:", result) | |
| elif multiply_button: | |
| result = multiply(first_number, second_number) | |
| if isinstance(result, str): | |
| st.error(result) | |
| else: | |
| st.write("Result:", result) | |
| elif divide_button: | |
| result = divide(first_number, second_number) | |
| if isinstance(result, str): | |
| st.error(result) | |
| else: | |
| st.write("Result:", result) | |
| elif exp_button: | |
| result = exponentiation(first_number, second_number) | |
| if isinstance(result, str): | |
| st.error(result) | |
| else: | |
| st.write("Result:", result) | |
| elif sqrt_button: | |
| result = square_root(first_number) | |
| if isinstance(result, str): | |
| st.error(result) | |
| else: | |
| st.write("Result:", result) | |
| # History using SessionState | |
| session_state = st.session_state | |
| if "calc_history" not in session_state: | |
| session_state.calc_history = [] | |
| # Update history on each calculation | |
| if result and not isinstance(result, str): | |
| session_state.calc_history.append(f"{first_number} {add_button.text if add_button else '', subtract_button.text if subtract_button else '', multiply_button.text if multiply_button else '', divide_button.text if divide_button else '', exp_button.text if exp_button else '', sqrt_button.text if sqrt_button else ''} {second_number} = {result}") | |
| # Display history | |
| if session_state.calc_history: | |
| st.subheader("Calculation History:") | |
| for entry in session_state.calc_history: | |
| st.write(entry) | |
| # Customization options | |
| st.subheader("Customization:") | |
| font_size = st.number_input("Font size", min_value=10, max_value=20, value=16, key="font_size") | |
| st.write("Current font size:", font_size) | |
| primary_color = st.color_picker("Primary color", key="primary_color") | |
| st.write("Current primary color:", primary_color) | |
| # Update layout based on customization | |
| st.markdown(f"<style>.stApp {{ font-size: {font_size}px; color: {primary_color}; }}</style>", unsafe_allow_html=True) | |