Create app.py

app.py

@@ -0,0 +1,116 @@
+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)
+