Project 4 · Practice Projects
Convert between common units (length, weight, temperature) using a menu-driven CLI. Extend the conversion table with new units without changing the core logic.
Difficulty: Lv ★ | Prior Knowledge: Basics Week 3, 9
Length/Weight/Temperature Conversion CLI (Bidirectional + Multi-category)
5 km to mile)Try the assignment yourself first — comparing your attempt with a working solution is where most of the learning happens.
"""Unit Converter — Multiple Categories + Bidirectional"""
def cm_to_inch(cm): return cm / 2.54
def inch_to_cm(inch): return inch * 2.54
def kg_to_lb(kg): return kg * 2.2046226218
def lb_to_kg(lb): return lb / 2.2046226218
def c_to_f(c): return c * 9 / 5 + 32
def f_to_c(f): return (f - 32) * 5 / 9
def menu_length():
direction = input("1.cm→inch 2.inch→cm: ").strip()
val = float(input("Value:"))
if direction == "1":
print(f"{val} cm = {cm_to_inch(val):.2f} inch")
else:
print(f"{val} inch = {inch_to_cm(val):.2f} cm")
def menu_weight():
direction = input("1.kg→lb 2.lb→kg: ").strip()
val = float(input("Value:"))
if direction == "1":
print(f"{val} kg = {kg_to_lb(val):.2f} lb")
else:
print(f"{val} lb = {lb_to_kg(val):.2f} kg")
def menu_temp():
direction = input("1.°C→°F 2.°F→°C: ").strip()
val = float(input("Value:"))
if direction == "1":
print(f"{val}°C = {c_to_f(val):.2f}°F")
else:
print(f"{val}°F = {f_to_c(val):.2f}°C")
def main():
handlers = {"1": menu_length, "2": menu_weight, "3": menu_temp}
while True:
choice = input("[Menu] 1.Length 2.Weight 3.Temperature 4.Exit:").strip()
if choice == "4":
break
if choice in handlers:
handlers[choice]()
if __name__ == "__main__":
main()Work through the Python Series track on your own, or join a guided cohort at our Pitampura campus and online.