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import streamlit as st
from fpdf import FPDF
st.title("🏋️♂️ BMI Calculator")
# User Info
name = st.text_input("Enter your name")
user_id = st.text_input("Enter your User ID")
# Height and Weight Inputs
st.subheader("Enter your height:")
feet = st.number_input("Feet", min_value=0, value=5)
inches = st.number_input("Inches", min_value=0, max_value=11, value=7)
weight = st.number_input("Enter your weight (kg)", min_value=0.0, value=70.0)
# BMI Calculation Logic
def calculate_bmi(feet, inches, weight):
total_inches = (feet * 12) + inches
height_m = total_inches * 0.0254
if height_m > 0:
return weight / (height_m ** 2)
return None
def get_bmi_category(bmi):
if bmi < 18.5:
return "Underweight"
elif 18.5 <= bmi < 24.9:
return "Normal weight"
elif 25 <= bmi < 29.9:
return "Overweight"
else:
return "Obese"
# PDF Generator
class PDF(FPDF):
def header(self):
self.set_font("Arial", 'B', 16)
self.cell(0, 10, "BMI Report", ln=True, align='C')
self.ln(10)
def styled_cell(self, label, value):
self.set_font("Arial", 'B', 12)
self.cell(50, 10, label, border=0)
self.set_font("Arial", '', 12)
self.cell(100, 10, value, ln=True, border=0)
def generate_pdf(name, user_id, height_ft, height_in, weight, bmi, category):
pdf = PDF()
pdf.add_page()
pdf.set_fill_color(240, 240, 240)
pdf.set_draw_color(180, 180, 180)
pdf.set_line_width(0.5)
pdf.rect(10, 30, 190, 100)
pdf.set_xy(15, 35)
pdf.styled_cell("Name:", name)
pdf.styled_cell("User ID:", user_id)
pdf.styled_cell("Height:", f"{height_ft} ft {height_in} in")
pdf.styled_cell("Weight:", f"{weight} kg")
pdf.styled_cell("BMI:", f"{bmi:.2f}")
pdf.styled_cell("Category:", category)
return pdf.output(dest='S').encode('latin1')
# BMI Calculation + PDF Download
if st.button("Calculate BMI"):
if not name or not user_id:
st.error("Please enter your name and User ID.")
else:
bmi = calculate_bmi(feet, inches, weight)
if bmi:
category = get_bmi_category(bmi)
st.success(f"Hello {name} 👋")
st.success(f"Your BMI is: {bmi:.2f}")
st.info(f"Category: {category}")
pdf_bytes = generate_pdf(name, user_id, feet, inches, weight, bmi, category)
st.download_button(
label="📄 Download Styled BMI Report (PDF)",
data=pdf_bytes,
file_name=f"{name}_BMI_Report.pdf",
mime="application/pdf"
)
else:
st.error("Invalid height. Please check your input.")
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